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Polyfoam Floor Insulation Products: Polyfoam Roofboard

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Polyfoam Floor Insulation Materials: Polyfoam Roofboard
Below you will find information on specific products within our range. To ensure that you purchase the correct products to suit your requirements we recommend that, you contact one of our qualified customer focused advisors, who will be only too pleased to help. Please call 08451 306 269 or email us for a quote or advice.
Polyfoam Roofboard  
Short Description
Compression resistance
All materials are compressed under load. If the roof is going to be transformed from a limited access waste of space into an interesting and useful space the insulation must be capable of accommodating applied loads. Polyfoam Roofboard is highly resistant to compression and withstands both occasional and long term static loads. A factor of safety for design loads of 3 (5 for long term static loads) is applied to the compressive strength of the product as outlined in the product data tables.
Moisture resistance
As can be seen in the attached detail drawings, in many applications Polyfoam Roofboard is above the waterproofing layer and thus exposed to rainwater. The board is resistant to moisture absorption and can be laid in standing water or up against wet concrete with minimal impact on the performance of the product.
Thermal insulation
Polyfoam Roofboard is a high performance insulant, with aged quoted thermal performance values. The actual performance in use of each grade of Polyfoam Roofboard is outlined in the attached application sections.
Fire Performance
When Polyfoam Roofboard is installed in a roof construction it will not contribute to the development stages of a fire.
Certification
Polyfoam Roofboard Standard, Extra and Super are 3rd party certified by the British Board of Agrément.
Application
Polyfoam Roofboard is used for the thermal insulation of flat roofs. If a lower strength insulation is used the potential uses of the roof space are limited and potential future use is also difficult. Increasingly, the optimum roof insulation has to:
  • have both thermal potential AND structural strength
  • be capable of bearing future change of use as well as offering a wide variety of design options for the use of the actual roof area
  • be a good thermal performer
  • be structurally stable in the long term
  • be lightweight
  • be easy to install
For protected membrane roofs the combination of strength and very low moisture absorption are key performance requirements. The following range of applications are some of the key areas of use of Polyfoam Roofboard: Protected membrane roofs for:
  • Schools, Hospitals and other public buildings
  • Offices
  • Retail developments
  • Industrial developments
  • Green/garden roofs
  • Roof terraces and patio areas
  • Roof top car parks
Polyfoam Roofboard is suitable for almost any roof construction including:
  • Under concrete for a roof top car park
  • Under gravel ballast in a protected membrane roof (on concrete, metal or timber deck)
  • Under paving slabs for a terrace area in a protected membrane roof construction
  • Under growing matter in a green/ garden roof
  • In a Single Ply Membrane roof
Handling and storage
Polyfoam Roofboard is supplied in polythene packs, labelled with identifying product and manufacturing data. The boards are easy to handle and non-irritant, no special protective clothing is required to install them. Polyfoam products should not be left exposed to prolonged sunlight as this will result in surface degradation. Where outside storage for extended periods is required cover with opaque/light coloured sheeting. Ensure the boards are not stored close to open flame or other ignition source, also avoiding volatile compounds and chemicals such as solvents.
Product Data
All Polyfoam Roofboard products have a moisture absorption of 0.20% by volume and continuous service temp. limits of -50°C to +75°C
Thickness (mm) Length (mm) Width (mm) Nominal Density (kg/m3) Thermal performance to BS 8741 Thermal performance to BS EN 131641 Design Loads2
Conductivity (W/mK) Resistance (m2K/W) Conductivity (W/mK) Resistance (m2K/W) Long term (kPa) Short Term (kPa)
Polyfoam Roofboard Standard
Compressive Strength 200kPa, Water Vapour Resistance 500 MNs/gm
75 1250 600 30 0.028 2.679 0.029 2.55 40 66
60 1250 600 30 0.028 2.143 0.029 2.05 40 66
50 1250 600 30 0.028 1.786 0.029 1.70 40 66
35 1250 600 30 0.028 1.25 0.029 1.20 40 66
Polyfoam Foil Faced Roofboard
Compressive Strength 200kPa, Water Vapour Resistance 500 MNs/gm
120 1250 600 30 - - 0.029 4.10 40 66
100 1250 600 30 - - 0.031 3.20 40 66
75 1250 600 30 0.028 2.679 0.029 2.55 40 66
60 1250 600 30 0.028 2.143 0.029 2.05 40 66
50 1250 600 30 0.028 1.786 0.029 1.70 40 66
35 1250 600 30 0.028 1.25 0.029 1.20 40 66
Polyfoam Roofboard Extra
Compressive Strength 350kPa, Water Vapour Resistance 667 MNs/gm
140 1250 600 38 - - 0.031 4.50 70 116
130 1250 600 38 - - 0.031 4.15 70 116
120 1250 600 38 0.027 4.444 0.029 4.10 70 116
110 1250 600 38 0.027 3.70 0.029 3.75 70 116
75 1250 600 38 0.027 2.778 0.029 2.55 70 116
60 1250 600 38 0.027 2.222 0.029 2.05 70 116
50 1250 600 38 0.027 1.852 0.029 1.70 70 116
Polyfoam Roofboard Super
Compressive Strength 500kPa, Water Vapour Resistance 667 MNs/gm
100 1250 600 42 0.028 3.571 0.036 2.75 100 166
75 1250 600 42 0.028 2.679 0.035 2.10 100 166
50 1250 600 42 0.028 1.786 0.034 1.45 100 166
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