Order Helpline 01752 692 760 | Open today 8:00am-5:00pm

A1 Impermeable Felt HR Roofing Underlay by Glidevale Protect - 30m x 1.5m Roll

Product Code:
Est. Delivery: 30-40 Working Days
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£38.22 Incl. VAT
Oops! Please select from the options

Product Description

Glidevale Protect A1 can be used for all pitched roof constructions (tiled and slated), whether the insulation is at ceiling joist level or at rafter level. It is a twin-ply construction of polypropylene non-woven spunbond layer and PP film.

Glidevale Protect A1 is a third-generation roofing underlay which has been developed specifically to overcome the disadvantages of traditional Type 1F felts and second generation plastic sheet materials.

Please note this product does not require the joints & laps to be taped but must be battened correctly.


Length: 30m.
Width: 1.5m.
Roll size: 45m2.
Roll weight: 7kg.
Weight: 145gsm.
Brand: Glidevale Protect.


  • Completely waterproof.
  • Can be used as a temporary roof covering.
  • Excellent nail tear strength and tensile strength.
  • Has unrestricted use for wind uplift in all exposure conditions in the UK and Ireland. Suitable for use in zones 1-5 at 345mm batten gauge.
  • UV and heat stable.
  • Absorbent undersurface prevents condensate drip-off.
  • Embossed dark grey upper surface reduces glare and takes a chalk line marking.
  • Does not generate noise under wind gusting.
  • Easy to cut, clean, light to handle and unaffected by temperature changes.



WIDTH 1500mm LENGTH 30m


Permeability Air Tight Roll Size 45m2

Products We Recommend


Questions & Answers


Would A1 Impermeable be ok on a sarking boarded pitched roof?


Yes this would be suitable, but as this felt is not permeable please be aware you should also ventilate the roof.

Product Reviews

5 / 5 1 reviews
Peter Thomas
14th March 2020
Good value and hopefully will do the job but may have to wait years before we know. Very slippery to walk on pitched roof.
Sorry, there was a problem loading the reviews. Please try again.

Product Enquiry Form

A1 Impermeable Felt HR Roofing Underlay by Glidevale Protect - 30m x 1.5m Roll

*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.