For use in single ply roofing-systems on suitable surfaces. Suitable for use with mechanically fastened warm roof waterproofing such as EshaPlan MF, EshaUniversal and EshaFlex MF.

ProTherm PIR FOIL Tapered is a rigid polyisocyanurate (PIR) foam core faced with an aluminium foil face composite on both sides.

Features and benefits:

• The PIR foam core is temperature tolerant and withstands the application of hot bitumen to the surface temperature of 240°C. 
• ProTherm PIR FOIL Tapered is compliant with BS 4841-4:2006, BBA Certificate 16/5341.
• Typical compressive strength for the foam exceeds 150 kPa when tested to BS EN 826: 1996 Thermal Insulating Products for Building Applications-Determination of compressive behavior.
• The product is stable, rot proof and durable and will remain effective as an insulation system at least as long as that of the waterproof covering. Durability depends on the method of application, the supporting structure and conditions of use.
• The insulation core and facings resist attack by mould and microbial growth, and do not provide any food value to vermin.
• ProTherm PIR FOIL Tapered resists attack from dilute alkalis and acids, mineral oil and petrol. The foam is not resistant to ketonic solvents. Damaged boards should not be used.
• The thermal conductivity of the foam varies 0.022 W/m·K.
• The insulation core has a water vapour resistance of 40 MNs/g/m and will, therefore, provide resistance to water vapour transmission. This will minimize both surface and interstitial condensation. The necessity for the inclusion of a water vapour control layer in the roof construction should be assessed in accordance with BS 6229:2003 Code of Practice for flat roofs with continuously supported coverings.
• Achieves BS476-7: 1997 Class 1 rating for surface spread of flame. Finished with 3 layer built-up felt and chippings, the roof will attain an FAA rating when tested to BS 476: 1988 External Fire Exposure Test. Further details on the fire performance may be obtained from Radmat Technical Services.
• Depending on the chosen waterproofing system, EshaTherm PIR FOIL Tapered is suitable for use on roof decks that are subject to limited maintenance foot traffic. Walkways should be provided on roofs requiring regular pedestrian access. The roof should be boarded out with protective boarding whenever site work is to take place after the roof board has been laid and the roof made watertight.

Spanning metal decks:

ProTherm PIR FOIL Tapered laid over metal decks must not exceed:

Trough Opening: | Insulant thickness:

• < 75 | 25;
• >75 ≤100 | 30;
• >75 ≤125 | 35;
• >125 ≤150 | 40;
• >150 ≤175 | 45;
• >175 ≤200 | 50;
• >200 ≤225 | 55;
• >225 ≤250 | 60.

On metal decks the long edges should be at right angles to the corrugations. All board joints should be fully supported by the deck. Please refer to BS 4841-4:2006 for details of thickness of board over metal trough openings.