This A1 innovative roofing underlay from Glidevale Protect has been designed to overcome the drawbacks of traditional Type 1F felts and second-generation plastic sheet materials. This 'third-generation' underlay is ideal for pitched roof constructions, whether you have tiled o... Read More
This A1 innovative roofing underlay from Glidevale Protect has been designed to overcome the drawbacks of traditional Type 1F felts and second-generation plastic sheet materials. This 'third-generation' underlay is ideal for pitched roof constructions, whether you have tiled or slated roofs and insulation at ceiling joist or rafter level.
Thanks to its exceptional waterproofing capabilities, this Glidevale Protect A1 underlay ensures complete protection for your roof. It also serves as a temporary roof covering when needed. Its unique twin-ply composition comprises a polypropylene non-woven spun-bond layer and PP film. With outstanding nail tear and tensile strength, it provides durability and reliability. Meeting all the necessary wind uplift requirements in the UK and Ireland, this underlay is suitable for use in various exposure conditions from zones 1 to 5 at a 345mm batten gauge.
Not only is this Glidevale Protect A1 underlay built to withstand the elements, but it also boasts UV and heat stability, ensuring long-lasting performance. Its absorbent under-surface prevents condensate drip-off, eliminating any concerns about moisture-related issues. The embossed dark grey upper surface reduces glare while allowing for precise chalk line marking to simplify installation. What's more, it is unimpacted by strong wind gusts and will not generate any noise for a peaceful environment.
Please note:
Question:
Is this felt breathable?
Answer:
No
Question:
I have a small 40cmx40cm hole in my existing old 1930's underlay. Can this be used as a patch and if so can it be 'glued' or must it be nailed into battens e.g. will I need to strip back to find them?
Answer:
Technically I will have to say no If I were overlapping an underlay I would use membrane tape and not glue
Question:
Can this be applied from inside the loft to the roof battens? My roof tiles are just layed directly on the roof so wondering if i can add this now without having to remove all the roof tiles.
Answer:
No, the rafters will not be covered
Question:
Could this be used as an underlay for my felt shingles.on my.log cabin roof?
Answer:
Normally felt shingles have a 3B type underlay, however, technically you could still use the A1
Question:
Could this be used under felt for pitched shed roof for Etta protection
Answer:
It could cause issues - you would be better off using a vapour control layer
Question:
Can A1 code A1-45 product be used for wrapping a SIPS constructed garden room?
Answer:
This is not breathable so would not reccomend for that purpose, better to use the Tyvek UV Facade.
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