Protect A1 Roofing Underlay 1 x 45m Product Code: 31795

Impermeable roofing underlay offering major benefits over traditional bitumen and reinforced plastic felts. Twin-ply construction of polypropylene non-woven spunbound layer and PP film. Unaffected by temperature change. Absorbent undersurface prevents condensation drip-off. Lightweight, easy to cut and install. Can be used in all pitched roof constructions, whether insulation is at ceiling joist or rafter level or as a temporary cover for up to 3 months. BRE and Wimlas certified.


  • Weight: 145g/m²
  • Non-Permeable ‘3rd Generation’ Underlay
  • Suitable for all Pitched Roof Constructions
  • Waterproof & Wind-Tight
Additional Information
Technical Specification
  • Brand : Unbranded
  • Product Length : 45 m
  • Product Type : Protect A1 Roofing Underlay
  • Product Width : 1 m
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

Click here to see information on our delivery charges and times



Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€40.45 Incl. 20% VAT

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Protect A1 Roofing Underlay 1 x 45m is rated 4.7 out of 5 by 64.
Rated 4 out of 5 by from Very Good Roof Underlay Lightweight and easy to apply. Would have received 5 stars but for its tendency to tear around hold down nails while manoeuvring it into position. Can't really comment about its performance, or reliability as it has only just been installed. Have given it 4 stars in anticipation for these aspects.
Date published: 2017-09-04
Rated 5 out of 5 by from Very easy to work with Very pleased with the price and quality.It was very good to work with.
Date published: 2017-08-23
Rated 5 out of 5 by from Roof underlay Ideal for my small project of roofing and laying shingles on the summerhouse. Excellent value
Date published: 2017-08-23
Rated 5 out of 5 by from A1 underfelt Great value and quality. Perfect material, I did loads of research and this is the stuff to use first. Loads cheaper then anywhere else too!
Date published: 2017-08-20
Rated 5 out of 5 by from Protect: says it and does it! I've used a lot of this as underlay for shed roofs. It's light, easy to work with and does not tear. Economical too. Good stuff!
Date published: 2017-08-02
Rated 5 out of 5 by from Great underlay only just put it on the cabin but seems really good and not bad for the price
Date published: 2017-04-20
Rated 5 out of 5 by from Works and does what it should. I have used it for insulating ground floor wooden floors from cellar doing sandwich with eco knauf earthwool insulation. very well went no draft but also breathable. great product strong roofing felt and great price!
Date published: 2016-12-06
Rated 4 out of 5 by from Great product The felt under my roof tiles had disintegrated and had large holes so wanted a cost-effective replacement. As the roof is three storeys up, carrying and fitting this lightweight roll was a doddle. Can't comment on durability but it certainly is easy to install.
Date published: 2016-12-05
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