Rockwool Sandwich Panel Manufacturer
- Fire Rating A1 Degree
- Perfect for Clean Room, Electronic Medicine Production Facility
- High Mechanical Strength
- Strong Corrosion Resistant
- Short Delivery Time
Your Reliable Partner and Rockwool Sandwich Panel Manufacturer in China
Sunnyda rockwool sandwich panel has outstanding advantage of 70mins fire resistant, rating A1. When rockwool sandwich panel is integrated with two layers of 9mm MGO board, this fire resistant time extends to 4 hours.
Sunnyda rockwool sandwich panel features high mechanical strength, excellent shearing resistant, strong corrosion resistant, high durability, and weather fastness. Steel used for rockwool sandwich panel can be specially processed to reach unique needs on self-cleaning, high durable color, corrosion resistance, acid and alkali resistant, or anti-fingerprint.
Rockwool sandwich panel density ranges from 80-120 kg/m3, this leads to panel is heavy. We recommend rockwool sandwich panel length less than 4m, no bending caused by heavy weight, also good for moving by hand. Once your design requires rockwool sandwich panel longer than 4m, must put steel bars inside for reinforcement.
Rockwool sandwich panel tongue and groove joint are easy to install without additional tools except for screw.
Sunnyda rockwool sandwich panel is widely used for industrial building wall, roof, partition, construction enclosure, and modular building. But, rockwool sandwich panel is most fit for clean room, electronic and medicine production facility.
Welcome your visit to our production facility and showroom. Contact us for a free sample!
Rockwool sandwich panel
Adopt sandwich panel with appropriative rock wool, the fire endurance scope within 30-120 minutes or more.
The standard panel is 3m to 12.5m in height. We also provide our customers with short or supernormal panel. Considering the weight of mineral wool, we do not recommend too long.
The standard density is 120kg/m3, water-intake rate is 5%, thermal conductivity less than 0.034 w/mk, durothermic temperature within the scope -240 – +650 °C。
The panel can prevent cold bridge effectively, and its heat retaining and energy-saving meet the requirement of low-carbon.
Panel meets the requirement of permanent building with excellent mechanical stability.
Panel do not contain formaldehyde and excitant particle.
Due to continuous modern production technology with high pressure glue spraying, panel has perfect completeness with good mechanical properties.
Ceiling and surround for clean factory, workshop for clean products, warehouse, cold room., long span panel, reinforcing the original structure, temporary office, shop, market, koist.
1, Fire rating: A1
2, Thickness: 50mm, 60mm, 80mm, 100mm, 150mm
3, Width: Wall and roof – 1200mm (effective 1150mm), 1000mm (effective 950mm)
4, Length: recommend less than 6m
5, Steel thickness: 0.4-0.8mm
6, Rock wool density: 90-120 kg/m3
7, Surface: Wall flat or groove, roof corrugated
8, Joint: Tongue and groove
9, Paint: PE, PVDF, HDPE, SMP, RMP
10, Color: Any RAL color
11, Delivery: 4-7 days
12, Production capacity: 3500m2 per day
13, Free sample
Ultimate Guide to Rockwool Sandwich Panel
Sunnyda rockwool sandwich panel production capacity is 3000m2 per day and delivery time takes 4-7 days.
The steel of rockwool sandwich panel, be PPGI or galvalume steel ranges from 0.4-0.8mm. The density of rockwool sandwich panel range is 80-120 kg/m3. The thickness of rockwool sandwich panel range is 40-200mm. The wide of rockwool sandwich panel is 1120mm. The length of rockwool sandwich panel has no limit, can be cut to size as per your project needs, one order could include dozens of hundreds of lengths, but restricted by sea container 40HQ maximum length 11.85m.
Sunnyda is equipped with full set of accessories for clean room, ceiling hanging materials, various channels and profiles which are shipped together with rockwool sandwich panel. Clean room special airtight door, window and pass box could also be included in your purchase.
Sunnyda has exported rockwool sandwich panels to dozens of countries during the last 10 years, trusted by clients and keeping long term relationship. Order or no order, we’ll be happy to support your business.
Welcome your visit to our production facility and showroom. Contact us for a free sample!
Rockwool Sandwich Panel: The Ultimate FAQ Guide
- Chapter 1: What is the Rockwool Sandwich Panel?
- Chapter 2: Why use the Rockwool Sandwich Panel?
- Chapter 3: What are the Disadvantages of the Rockwool Sandwich Panel?
- Chapter 4: Where can you use the Rockwool Sandwich Panel?
- Chapter 5: Is Rockwool Sandwich Panel Fire Resistant?
- Chapter 6: What are the Components of the Rockwool Sandwich Panel?
- Chapter 7: What are the Characteristics of the Rockwool Sandwich Panel?
- Chapter 8: What is the Thickness of Rockwool Sandwich Panel?
- Chapter 9: How do you Install a Rockwool Sandwich Panel?
- Chapter 10: Why is Rockwool Sandwich Panel Best of Acoustic Insulation?
- Chapter 11: When should you Choose Rockwool Sandwich Panel Insulation?
- Chapter 12: What Determines Rockwool Sandwich Panel Price?
- Chapter 13: How does PUF Insulation compare to Rockwool Sandwich Panel Insulation?
- Chapter 14: How do you Manufacture Rockwool Sandwich Panel?
- Chapter 15: What are the Quality Standards for Rockwool Sandwich Panel?
- Chapter 16: Are Rockwool Sandwich Panels Safe?
- Chapter 17: Which Materials are Rockwool Sandwich Panel made of?
- Chapter 18: What Thermal Properties Affect Efficiency of Rockwool Sandwich Panel?
- Chapter 19: How Long do Rockwool Sandwich Panel Last?
- Chapter 20: Can you Recycle a Rockwool Sandwich Panel?
- Chapter 21: How does Polyurethane Sandwich Panel compare to a Rockwool Sandwich Panel?
- Chapter 22: What is the Difference between Rockwool Sandwich Panel and Sandwich Panel Roof?
- Chapter 23: Is there any difference between Rockwool Sandwich Panel and Polystyrene Sandwich Panel?
- Chapter 24: How does a Rockwool Sandwich Panel compare to Glass Wool Sandwich Panel?
- Chapter 25: Can you use a Rockwool Sandwich Panel to Construct Walls and Roof Panels?
In this guide, I am going to answer all questions about the Rockwool sandwich panel.
Whether you want to learn about fire resistance capability, design, insulation, thermal properties, limitations or characteristics, you’ll find everything here.
What is the Rockwool Sandwich Panel?
A Rock wool sandwich panel is an insulation material constructed from stone wool that is enclosed between two metal sheet surfaces.
The stone wool has a high density with exceptional compression, and tensile strength which makes it suitable for constructing buildings.
Figure 1 Rockwool sandwich panel
Why use the Rockwool Sandwich Panel?
Rockwool sandwich panel will offer you numerous advantages over other insulating materials.
Some of the benefits of Rockwool sandwich panel include:
· Good Thermal Efficiency
Rockwool has outstanding thermal resistance properties which will enable you to reduce the energy bills spent on heating, and cooling your building.
· Noise Insulation
You can use Rockwool in places like meeting rooms or offices in busy towns to reduce noise nuisance.
The material can trap sound waves, and deaden the vibration due to random fiber orientation, and high density.
The material has good fire resistance properties and is suitable for constructing safety buildings that require fire protection.
Using the Rockwool sandwich panel to construct your building will greatly improve its capability to protect life, and property in case of a fire outbreak.
You can use Rockwool if you want to minimize risks of bacteria and mold infestation inside the building. This is because Rockwool provides room for moisture escape in the construction.
Using Rockwool for constructing your buildings offers you a durable property that will serve you for a very longtime because of the unlimited lifetime of the material.
The durability of the material reduces the cost of maintenance, replacements, and repairs.
· Resistance to Compression
Rockwool sandwich panels are very firm, and not easily damaged through compression.
This makes it suitable for constructing buildings whose layout or use may change with time, and require additional portions as well as thermal insulations for domestic buildings.
· Environmental Friendly
The material reduces carbon footprints thanks to its natural origin and hazards free rating.
Besides, using Rockwool sandwich panels reduces air pollution because you will not heavily rely on non-renewable energy sources like electricity, and gas.
The materials for making a Rockwool sandwich panel is naturally sourced and can be recycled over and over again.
You can use old Rockwool sandwich panels to construct new panels when the building has served its purpose, and therefore reducing the cost of production.
· Fast Construction/Installation
You can use fast to install Rockwool sandwich panels that are producedfollowing the layout of your building drawing. Hence, you will shorten the installation period with more than 40%.
What are the Disadvantages of the Rockwool Sandwich Panel?
The main disadvantages of a Rockwool sandwich panel include:
- The core material is heavier compared to core materials for other insulating sandwich metals
- Rockwool is non-biodegradable and will cause a huge environmental nuisance if carelessly disposed of.
- Handling the material can cause discomfort through skin irritations
- The dust from Rockwool can cause serious allergic reactions to people with compromised respiratory health issues. Wearing a dust mask is advisable.
- It takes longer to dry should it wet.
Where can you use the Rockwool Sandwich Panel?
Rockwool sandwich panels can be used in many industries for building the roofing, walls, modular buildings, and construction enclosures.
You can also use Rockwool sandwich panels to:
- Construct storehouses
- Protect medium, and high-level buildings from fire
- Acoustic insulation in residential,commercial buildings, studios, offices, etc.
However, the material is most suitable for the construction of cleanrooms, pharmaceutical and electronic industries most
Is Rockwool Sandwich Panel Fire Resistant?
Yes, Rockwool Sandwich panels can withstand temperatures above 1000°C, and the core material itself is non-combustible.
The material’s high density will stop the fire from penetrating the fibers, prolonging the spread of fire to enable people to leave the building.
Figure 2 Rockwool panel
What are the Components of the Rockwool Sandwich Panel?
The Rockwool sandwich is composed of surface material and the Rockwool filling material.
· Surface Material
You can select Rockwool sandwich panels constructed from PPGI or galvalume steel
· Galvalume Steel
Galvalume steel coating consists of aluminum, zinc, and silicon to protect the underlying metal (steel) from oxidation.
The components ratio in galvalume steel is 50% zinc, just under 50% aluminum, and traces of silicon.
It helps the metal resist rust, and offers enhanced long-term protection when exposed to a fluid which increases the speed of oxidation compared to normal galvanizing.
This type of coating is best suited for metal paneling, and roofing for outdoor applications since it can withstand intense corrosion than standard galvanizing.
However, you should not use galvalume steel in an alkaline environment because the aluminum in the coating is less stable under such conditions.
The cut edges of galvalume steel are more prone to corrosion given that the honeycomb structure of the coating of the steel provides insufficient protection to exposed edges.
When corrosion occurs in galvalume steel, it will spread from the point of original contact whereas the corrosion remains localized in PPGI coating.
You should also avoid using this type of steel in an application where the chances of damages, scratches, and indentation are high.
· PPGI Coating
These are pre-painted galvanized iron steel. The coating has an evenly distributed layer of zinc cover which protects the underlying steel sheet from oxidation and rust.
The steel that has this type of surface treatment is very durable and highly resistant to attack UV sunlight rays and weather.
· Insulating Core Material: Rockwool steel
Rockwool is wool manufactured from molten rocks which include a mixture of anorthosite, basalt, and cemented briquettes. You can also make Rockwool through melting basalt, dolomite, diabase, and combining them with Bakelite.
The rocks are subject to heat overabout 1600°C to melt the rock mixtures and spun them into fibers. The spun rock wool is stabilized through adding a mineral oil and a binder, which also makes it water repellant.
What are the Characteristics of the Rockwool Sandwich Panel?
A good Rockwool panel should possess the following features:
Figure 3 Joining rockwool panel
- High fire resistance
- Anti-pressure, anti-impact, and anti-quake
- Waterproof and wet proof
- Eco friendly and energy saving
- Great sound insulation rating
- God thermal properties
- Asbestos-free: Non-toxic
- Fast and easy to install
Does Rockwool Sandwich Panel have Size Limitations?
Yes, the length of the Rockwool sandwich panel is limited to the size of shipment vessels, which can only house 11.85 meters.
The standard width of the panels is usually 1120mm while the thickness can vary from 40mm to 200mm.
However, you should use panels that are less than 4 meters that are easy to handle and move around without bending.
When your requirements exceed 4 meters, insert internal steel bars to reinforce against bending.
How do you Install a Rockwool Sandwich Panel?
When installing a Rockwool sandwich panel, you must take the following precautions to ensure good installation and safety to installing personnel.
- Check the suitability of the existing structures and ensure that the surface width is sufficient for installation.
- The installation personnel should wear rubber shoes to avoid damaging the panel surfaces and walk on roof ribs while mounting roof panels.
- Ensure that all the safety measures on the working site have been put in place as per the regulations.
When installing roofing, follow the following steps:
- Lift the panels to points of installation using a U shaped hook or avacuum suction.
- Place the panels close to the main trusses on the roof purlins and distribute them across the roof length while considering the direction of installation.
- When working with log and heavy panels, you should use a crane and special lifting clamps to lift them one by one. Lift the loads using at least two clamps to move the panels to the desired location.
- Ensure that you remove all the protective films on the inside before installation. Similarly, partially remove the protectives on the panel edges and joints and remove the rest by the end of the installation shift.
- When installing the panels, place them in the opposite direction to that of the prevailing wind.
- Place the first panel in perfect alignment and square to the roof structure. You will fix the panel on the ‘valley’ found next to the first empty rib to secure it.
- Overlap the first empty rib on the second panel to the last full rib of the first panel and screw them together on the roof purlin.
- You should place the fixing elements centrally and perpendicularly to the surface of the panel.
- Use original saddle caps because they ensure that you correctly position the fixing and evenly distribute the pressure.
- Install the panels in strips where the length of the roof pitch has more than one-panel cover. Install the second panel by overlapping the first one longitudinally.
- You can apply secondary fixing elements along the joints to enhance the tightness of the joints and uniform distribution of the panel effects.
- Remove all the metal chippings that you produce in the course of installation with a vacuum cleaner to avoid scratching the panel surface.
Figure 4 Rockwool panel
For wall installation, observe the following:
- Place the first panel in perfect alignment with the wall structure.
When installing the panels, insert a spacer between the base drip and steel-cut edges of the panel to prevent corrosion from starting and spreading from the edges.
- Fix the panels to the wall substructure using a screw with a gasket and a metal washer.
- Install the remaining panels by slightly inclining it towards the first one and gently pushing it against the first panel to get the best coupling.
- Inspect the panels verticals atleast once every 4 months to ensure that they are in good condition.
- You should install panels in bands where the height of the building requires more than a single panel.
- You should fix the panels using stainless steel screws if it is exposed to the weather. Perpendicularly fix the screw together with a metal washer and gasket to ensure water tightness of the fix.
- Use a jigsaw or a circular saw for cutting the panels at the installation site.
- Before cutting the panel, use adhesive tape to protect the area you want to cut, mark it using a felt pen, cut, and then clean the chippings off the surface. You can also strengthen the cut area using angle braces since cutting will weaken the panels.
- Ensure that all possible leakages are sealed in heat preservation facilities.
- You can add a layer of waterproof material on the surface when installing under cold weather conditions.
What is the Thickness of Rockwool Sandwich Panel?
The thickness of surface galvalume steel or PPGI steel can range from 0.4 to 0.8 mm while that of the whole Rockwool sandwich panel will range from 40 to 200 mm.
The thicker the Rockwool sandwich panel, the more efficient the insulation.
Why is Rockwool Sandwich Panel Best of Acoustic Insulation?
Noise insulation provided by Rockwool sandwich panels isdue to the structure of fibers. They possess a characteristic high sound absorption coefficient over a very wide range of frequencies.
The fibers have an orthogonal arrangement towards the sheets.
They are also very densely compacted to achieve monolithic blocks which are perfect for the absorption of sound.
You can also include an internal steel sheet that has been micro-perforated to enhance the sound absorption properties and reduction of reverberation.
When you lineyour room with a Rockwool sandwich panel, you can reduce the sound by more than 10Db and further reduction is dependent on other details of the room.
When should you Choose Rockwool Sandwich Panel Insulation?
You should use select Rockwool sandwich panels when your main aim is to insulate against fire and sound.
Rockwool has the best fire performance of all the insulating materials and can achieve up to 4 hours of fire resistance, which is sufficient enough to allow people to leave the building.
Similarly, it is perfect for insulation against sound and is fundamental for applications that need to be soundproof such as television and radio studios among others.
What Determines Rockwool Sandwich Panel Price?
Figure 5 Rockwool sandwich panel
The price of a Rockwool Sandwich panel will vary to the following factors;
- The quality and thickness of the surface steel sheets
- The Thickness and density of Rockwool
- The number of ribs in the roof
- Type of fixation, that is, visible or hidden
- Aesthetic finishing, that is, type of paint, varnish material and it’s color
How does PUF Insulation compare to Rockwool Sandwich Panel Insulation?
PUF is an acronym for polyurethane foam insulation which you can construct through filling the void of the insulating material by an insulating gas/air.
When you release the pressurized PUF sprays in the insulating region, they mix with air and solidifies, a process that traps numerous air pockets inside the solid.
On the other hand, Rockwool is constructed from stone fibers.
Rockwool is heavier and more densely packed than PUF insulation.
As such, Rockwool offers higher fire resistance and more temperature tolerant compared to PUF.
PUF insulation also has a high resistance to water absorption and low permeability to moisture compared to Rockwool.
In terms of thermal insulation, PUF offers superior thermal insulation compared to Rockwool sandwich panels.
How do you Manufacture Rockwool Sandwich Panel?
Figure 6 Sandwich panel production
Production of commercial Rockwool sandwich starts from heating basalt rocks and other raw materials at 1600°C.
The molten rocks are then subjected to air or a current of steam.
You can add oil to during the production process to reduce dust formation.
The molten rock is then rotated in a spinning wheel at a very high speed, producing a finished fibrous product.
An automatic machine uncoils the inner and outer sheet layers. The Roll forming machine designs the sheets to the desired shape for either roof or wall panels.
You then cut slabs of Rockwool into filler strips and feed them between the sheets when making the sandwich panels.
For roof panels, you cut the slabs into trapezoidal shapes that fit them.
Run the sheet layer through a preheating station to obtain a uniform reaction.
Apply the appropriate amounts of components using two or multi-component high-pressure metering machines.
An oscillating coating gantry then evenly distributes the foam mix.
The reacting foam moves to a double belt where the foam cures in a slat conveyor visible as a continuous moving mold.
Using a cross cutter, cut the endless formed sandwich ribbon into the desired length and set it to cool in the conveyor.
Stack the cooled panels on pallets and wrap them using a PVC foil then deliver it to the customer.
The whole production unit should be automated and control systems configured to ensure uniform and constant product quality.
What are the Quality Standards for Rockwool Sandwich Panel?
The fire protection qualities of the Rockwool are tested and classified according to TS EN 13501-1, A2-s standards.
Similarly, the product specification should meet the specifications of TS EN 14509 which deals with self-supporting double skin metal faced insulating panels.
Are Rockwool Sandwich Panels Safe?
Rockwool has been classified by the International Agency for Research on Cancer under materials that are not classifiable as to human carcinogenic.
However, exposure to dust from Rockwool can cause temporary skin irritation which can be very discomforting to personnel working with it.
As a standard practice, you should always observe these safety measures to avoid any discomfort from Rockwool dust:
- Properly store the materials to avoid damages that can release chippings and dust
- Unload the materials at the installation site
- Ensure that the room you are working on is properly ventilated
- Always wear protective gloves when handling the Rockwool. You should also put on protective dust masks and goggles in poorly ventilated rooms.
- Clean the working area using a vacuum to avoid any whirling dust
- Should Rockwool dust get to your hands, wash it off with running tap water rather than rubbing the particulate off.
- You should cover the open ventilation ducts to minimize the distribution of Rockwool particulates in the dust.
Which Materials are Rockwool Sandwich Panel made of?
Figure 7 Assembling rockwool sandwich panel
A Rockwool Sandwich Panel comprises of steel sheets that are either galvanized or galvalume.
The core is constructed using different types of natural materials including:
- Basalt: Rock of volcanic origin
- Dolomite: Rock comprising mineral dolomite
- Bauxite: Rock rich in aluminum
- Slag: Energy-efficient since has already been melted before
- Recycled mineral wool
- De-dusting oil: Reduces dust in the product
- Binder: Holds the fibers together
- Coal: For melting the raw material
What Thermal Properties Affect Efficiency of Rockwool Sandwich Panel?
The efficiency of Rockwool in thermal insulation is determined by the following factors:
· Thermal Conductivity
This parameter is expressed as (W/mK) and is the measure of how heat is transferred through the Rockwool core.
You should consider selecting a material with very low thermal conductivity for enhanced thermal insulation.
· Thermal Resistance
This is also known as the R-value and is calculated as thickness (m) divided by conductivity (W/mK).
This measures the ability of the Rockwool to resist heat loss per unit thickness.
Thicker Rockwool core has lower heat conductivity.
When considering the R-value of the material, also consider the specific heat capacity, density and weight of the material to help you maximize the insulation abilities of the Rockwool.
· Specific Heat Capacity
A Rockwool material with high specific heat capacity will absorb more heat with an increase in temperature.
· Material Density
The density of a material is measured as material mass per unit volume. A good Rockwool core should have a high density which supports high thermal mass and results in low thermal conductivity.
· Thermal Diffusivity
To work out thermal diffusivity, you will use the formula: Thermal Conductivity / Density x Specific heat capacity.
This parameter will let you know the ability of the Rockwool to store thermal energy in comparison to its ability to conduct it.
The lower the figure, the better the performance of the Rockwool sandwich panel as an insulator.
· Time-temperature Curve
You can use this method as provided under ISO 834 to test and rate the performance of different Rockwool materials in withstanding similar levels or intensity of a fire.
The curves will indicate how long it takes to reach the maximum temperature and how long the Rockwool sandwich panel can hold its stability.
How Long do Rockwool Sandwich Panel Last?
A Rockwool sandwich panels can last the service life of your building when you do proper installation and maintenance.
The panels can maintain their original fire protection, insulation, and acoustic properties incase no physical damage affects them.
Can you Recycle a Rockwool Sandwich Panel?
Yes, you can use old Rockwool sandwich panels to construct new panels since a Rockwool comprise of products from natural sources.
Likewise, one of the construction materials for a new Rockwool sandwich panel is a recycled steel slag. The recycled content can vary from 16 to 40% depending on the manufacturing factory.
The number of recycled materials should be optimized to achieve the best fire, thermal and acoustic properties at maximum allowable recycled content.
How does Polyurethane Sandwich Panel compare to a Rockwool Sandwich Panel?
The main difference between the two Is the composition of core material used for manufacturing and their functional abilities.
Figure 8 PU Panel
· Isolation Core
A Polyurethane Sandwich Panel is constructed using a polyurethane foam which is a polymer comprising organic units linked by carbamates.
When the molten foam contacts air it solidifies and sticks on to the metal sheets that form the internal and external surfaces.
It forms a monolithic insulating material with high insulating capabilities.
On the contrary, a Rockwool sandwich panel is constructed from an assortment of natural rocks treated to temperatures of about 1600°C.
· Functional Properties
The main functional difference includes:
i. Insulation Value
Polyurethane Sandwich Panels have a higher insulation value compared to a Rockwool sandwich panel.
For instance, you will use a Rockwool sandwich panel that is about 80 mm thick to achieve the same level of insulation that is provided by a 50mm polyurethane Sandwich Panels.
ii. Fire Protection
Rockwool sandwich panel is by far the best material to use when you want to achieve maximum resistance from fire.
In contrast, the organic nature of polyurethane makes it susceptible to burning and will, therefore, fuel the fire rather than resist it.
iii. Acoustic Properties
The Rockwool panel has superior noise insulation properties compared to polyurethane Sandwich Panels thanks to the structure of their fibers.
Rockwool has more weight compared to polyurethane which makes it a bit challenging to handle and install.
What is the Difference between Rockwool Sandwich Panel and Sandwich Panel Roof?
A Rockwool Sandwich Panel has to contain Rockwool as the main insulating core.
There are both wall and roof Rockwool sandwich panels for construction or cladding of walls and roofs respectively.
Sandwich Panel roof can comprise an assortment of insulating material as long as the desired insulation needs are met.
You can select from sandwich panel roofs with corrugated upper sheets or with rabbets.
Is there any difference between Rockwool Sandwich Panel and Polystyrene Sandwich Panel?
When sourcing for these panels, you should take note of the following:
· Insulating Core
Polystyrene (PIR) sandwich panels comprise a polymer that has been impregnated with a foaming agent.
The foaming agent is exposed to steam to form a cell structure that is uniformly closed with great insulation properties.
· Thermal Performance
Polystyrene has superior insulation properties per unit core compared to a Rockwool sandwich panel.
Breathability, also commonly referred to as vapor permeability, has gained a lot of emphasis as a key property in wall insulation.
Rockwool has a very low resistance to diffusion and supports easy penetration of water vapor without an obstacle while PIR supports negligible vapor penetration.
However, the high vapor permeability is not a disadvantage nor an advantage in itself.
The main issue is to avoid the condensation of water inside the wall should the temperature drop.
Rockwool core has more weight compared to sandwich panels composed of PIR cores and therefore requires more experienced personnel to handle and install.
· Moisture Resistance
There is a wide difference between polystyrene and Rockwool in terms of water absorption.
In case of exposure to water, the PIR core will repel water and dry very quickly, therefore, offering at most protection against water.
On the other hand, Rockwool is very susceptible to water, and soaking is unacceptable.
When installing the Rockwool sandwich panels, ensure that you seal off all avenues of possible water ingression.
· Fire Protection
Rockwool sandwich panels rate as class A1 to BS under ISO 13501-1 and therefore the best material so far for insulation against fire.
Ifa fire breaks up, the material will emit a negligible amount of fumes and smoke, slowing the spread of fire by up to 4 hours.
In contrast, PIR sandwich panels are combustible and their light density will not be able to stop the spread of fire.
However, with proper installation and sufficient protection with enough surface material, then PIR will not fuel nor reduce the spread of fire in a building.
· Acoustic Properties
The arrangement of Rockwool fibers gives it an advantage over PIR on sound insulation.
Rockwool will absorb more sound compared to PIR at the same thickness and therefore is a better choice where insulating against noise is the primary concern.
How does a Rockwool Sandwich Panel compare to Glass Wool Sandwich Panel?
You should consider the following:
Figure 9 Glasswool sandwich panel
· Insulating Core Content
As with the other insulating materials, the main difference comes in the raw materials used in the construction of panels.
Whereas the Rockwool comprise of molten stones which solidify to form an insulating material, glass wool comprises glass fibers that are arranged into wool-like texture and bound together using a binder.
In the process, the glass fibers trap numerous tiny air pockets which contributes to good thermal insulation properties.
· Comparative Performance
Some of the main performance specifications are:
i. Thermal Insulation
The glass wool will give you better thermal insulation compared to a Rockwool sandwich panel.
Besides, the glass wool can achieve a 10% higher thermal efficiency compared to Rockwool.
You can, therefore, use glass wool which is 10% thinner and lighter to achieve the same thermal insulation provided by a thicker and heavier Rockwool sandwich material.
ii. Acoustic Performance
The differences can be small but rock wool will achieve higher noise insulation in most cases compared to glass wool.
iii. Compressive Strength
The parameter is vital where a high weight loading is subjected to the construction.
Generally, The Rock wool will give you almost double the compressive strength compared to glass wool and hence is more suitable in scenarios like the construction of a flat roof.
iv. Fire Resistance
Rockwool offers the best fire resistance compared to glass wool sandwich panels.
The high-density characteristic of Rockwool is most suited for stopping the spread of fire.
On the contrary, the glass wool has a low-density which will not stop flame penetration between the fibers.
v. Working Temperature
Insulating materials have a defined maximum service temperature.
It indicates the maximum and continuous temperature under which the material can continuously function without losing its thermal insulation properties.
The Rock mineral wool can withstand a maximum service temperature of up to 850°C while glass wool will achieve a maximum of 230°C without any physical modification.
vi. Water Resistance
Both glass wool and Rockwool will be affected when water fills the air spaces in the insulating material thus reducing their thermal insulation capacity.
However, the rate of water ingression is dependent on the density of the material, and the lighter the material, the faster the water penetration.
Hence, glass wool will fill faster compared to Rock wool.
Can you use a Rockwool Sandwich Panel to Construct Walls and Roof Panels?
Yes, Rockwool Sandwich Panels are used for building walls and roofs.
What is the R-value of a Rockwool Sandwich Panel?
R-value is a value that indicates the effectiveness of thermal resistance of an insulating material against the heat or thermal conductivity.
The R-value of Rockwool varies to the composition of materials and techniques used for manufacturing. The value can vary from 2.5 to 3.7 ft2·°F·h/BTU.
You should note that the higher the R-value, the better the performance of the insulator.
As you can see there are quite a number of aspects to consider when buying Rockwool sandwich panels.
I hope, this guide answered all questions you had about this panel.
If you have any additional question, feel free to contact Sunnyda team.