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Warm Roof Insulation

ProTherm PIR B


ProTherm PIR B is a rigid Polyisocyanurate (PIR) foam insulation for use in bituminous roofing-systems on suitable surfaces.

ProTherm PIR B is a rigid Polyisocyanurate (PIR) foam core faced with bitumen coated glass fibre tissue on one side and polypropylene fleece on the other. The PIR foam core is temperature tolerant and withstands the application of hot bitumen to the surface temperature of 240°C. For use with adhered or mechanically fastened warm roof waterproofing such as EshaUniversal, EshaFlex & EshaGum.

For a comprehensive NBS J42 or J41 specification contract Radmat Building Products.

ProTherm PIR B is compliant with BS 4841-4:2006, BBA No. 07/4487. See BBA Certificate 07/4487.


ProTherm PIR B is bonded to the EshaBase SA Alu 2mm or prepared existing roof surface with EshaStik PU Adhesive.  Individual ProTherm PIR B boards should be laid with the bitumen tissue side up with edges butted and in a break bond pattern laid at right angles to the edges of the roof or diagonally across the roof.

When applying ProTherm PIR B on existing bituminous or sanded substrate the surface must be prepared in accordance with the project specific guidelines provided by Radmat.

All installation to be according to guidelines and specifications supplied by Radmat.

Description  Value
Board Width 600mm
Board Thickness

30, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150

Board Length 1200mm
Board weight (120m thick) 4.1kg
Edge Profile Square cut
Certificates BBA No. 07/4487

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