Protect
Membranes, UK producer of roofing and construction membranes, has introduced
Protect TF InterFoil, a CE marked, highly reflective insulating breather
membrane designed for use within a timber frame wall panel to enhance its
overall thermal performance.
Ideally
suited to offsite and modular construction, Protect TF InterFoil features a low
emissivity, vapour permeable reflective surface, using the tried and tested
technology of TF200 Thermo, which can be installed either side of the
insulation in conjunction with a 20mm air cavity.
This
means the building developer and fabricator can move from more expensive, rigid
high-density boards to fibrous or EPS insulants without increasing panel sizes,
thereby achieving material cost savings.
When Protect TF InterFoil is used with Protect TF200 Thermo insulating
breather membrane on the external face of the sheathing board and Protect VC
Foil Ultra insulating vapour control layer on the warm side of 100mm 0.032
lambda insulation within a typical 140mm deep timber stud section, the overall
wall construction can achieve U-values as low as 0.18W/m²K. This meets the more onerous Fabric Energy Efficiency requirements
detailed in Building Regulations Part L1A.
John
Mellor, Product Manager comments, “With the ongoing material supply and price
instability of PIR rigid board insulation, using Protect TF InterFoil as part
of a timber frame or modular wall system offers opportunities to make
meaningful material savings whilst retaining low U-values, without increasing
the size of their panels.
