Protect A1 Roofing Underlay 1 x 15m Product Code: 31617

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 : 15 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.


Click here to see information on returns and cancellation

€19.95 Incl. 20% VAT

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Protect A1 Roofing Underlay 1 x 15m is rated 4.6 out of 5 by 58.
Rated 5 out of 5 by from Roof underlay Excellent product good value easy to work with thanks
Date published: 2017-09-07
Rated 4 out of 5 by from NON BREATHABLE!!!! Just had building control guy in and because is non breathable, now I have to look and install 4 tile vents. Pain in the butt that could be easy avoided.
Date published: 2017-08-24
Rated 5 out of 5 by from Good price good product Good felt. Nice size for a small extension. Would use again. Great price.
Date published: 2017-08-20
Rated 5 out of 5 by from Great product Great product at a great price, easy and quick to use.
Date published: 2017-08-20
Rated 5 out of 5 by from Great product and great value I've used this a number of times over the years on sheds and other outbuildings. It's worth every penny. It's easy to cut, yet impossible to rip. Even if you're not ready to put the felt on, this product will protect your shed from the elements for months. Remember though, shiny side out!! Would highly recommend and ScrewFix sell it for a great price.
Date published: 2017-08-20
Rated 4 out of 5 by from Mixed emotions. Used product on my large shed roof, found that unless there were two of you handling the material the product in any sort of wind got blown around, that was the only down side. Found the product easy to cut as long as your trimming knife was sharp, over all the product was strong, and as I found out while putting it on, it's waterproof. Will certainly use it again.
Date published: 2017-08-17
Rated 5 out of 5 by from Great economical choice Strong, durable, waterproof and easy to lay. Great economical choice.
Date published: 2017-07-26
Rated 5 out of 5 by from Easy / clean to use Only just installed this, so can't vouch for reliability/performance yet (so have given it 5 sars, will amend if I have any problems). Nice clean, light weight and very easy to use, now I've used it I'm disappointed that I didn't have it for the last shed I built, but retro fitting would be too difficult.
Date published: 2016-12-03
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