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Safeshield XT Reflect is an A2-s1, d0 fire rated construction membrane with no reliance on substrate to achieve this classification.

Permavent APEX is both an air and vapour permeable membrane for use as a pitched roof underlay.

A unique solution for low pitch slate and tile roofs in addition to innovative dryfix roofing products.

An extensive range of membranes suitable for all types of domestic & commercial roofing & walling applications.

Construction membranes designed primarily for walling applications

Case Studies

Lucent W1, Piccadilly

Permavent Skytech Pro XL membrane and Easy Slate were specified on one of the most complex roofs ever constructed in London.

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Woodhouse Farm, Shropshire

The Easy Roof System allowed contractors to refurbish the roofs of 3 historic barns, while maintaining the original aesthetic and low pitch.

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Genting Casino, Riverlights – Derby

Safeshield XT Reflect A2-s1, d0 fire rated wall membrane was used in the recladding of the Genting Casino, Premier and Holiday Inns.

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Holy Family Catholic Primary School, Armley

Recovering works on an Armley primary school renewing the fibre-cement slate roof with Permavent RED vapour-permeable underlay.

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Candleriggs, Glasgow

Safeshield XT Reflect A2 -s1,d0 fire rated membrane used in a refurbishment in the heart of Glasgow.

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Westpier, Scarborough

A reroofing project for Scarborough Borough Council using Permavent APEX.

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ALL CASE STUDIES

Need Some Help?

What is the Air Permeability value for APEX?

Permavent APEX air permeability value is >36.72m3/m2h50Pa. 

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Where I can find my local supplier?

Permavent products are stocked across the country in a wide range of builders' merchants and wholesale locations. Read more about our Stockist Finder.

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Are there any Permavent membranes suitable for all UK wind zones?

All Permavent membranes are suitable to various areas and projects, but several are suitable for all UK wind zones.

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Building Control have instructed that I restrain the laps of the membrane – how is this achieved?

In accordance with BS5534 the laps of a roofing underlay can be restrained in 3 ways. Click Further Info to read more.

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Can Easy slate be used with man-made slates?

Yes, the uniform properties of fibre-cement slates work effectively when installed with Easy Slate.

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Can I hook fix with Easy Slate?

Yes, Easy Slate can be installed using traditional hook-fixing methods.

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Can I install Easy Slate with Rooflights?

Yes, the Easy Roof System can be installed unaffected by the addition of rooflights. Please seek guidance from the rooflight manufacturer as to the minimum pitch when using their products.

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Can I use Permavent APEX on a cold/warm roof application?

Yes, Permavent APEX can be installed in both applications. For more complex roofs please speak with our technical department.

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Can I use Permavent APEX without any ventilation?

Permavent APEX complies with NHBC requirements for cold/warm roof constructions without the need for any high or low level ventilation under the NHBC warranty.

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Can I use my usual brand of breathable membrane and still get the 40 year guarantee?

No, in order to qualify for the 40 year guarantee the membrane used must be Permavent DRY+. Read on for further stipulations.

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Can Permavent APEX be left exposed before roof slates/ tiles are installed?

Yes, it can. Permavent APEX is UV stable for up to 3 months. 

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Can Permavent breathable membranes be left exposed before roof slates/ tiles are installed?

Yes, Permavent construction membranes are UV stable up to 3 months and water resistant.

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Can you install Easy Slate or Plain Easy with reclaimed products?

Yes, Easy Slate and Plain Easy along with the Easy Roof System as a whole can be used alongside reclaimed products in historical renovations or replacement roofs.

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Can you use Easy Slate with random diminishing slates?

Permavent can offer off-the-shelf and bespoke solutions for this application.

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Could Plain Tiles absorb water and crack in frost at lower pitches?

Plain Easy separates the tiles from one another and significantly reduces the chances of cracking due to freeze-thaw action.

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Do I need to increase the headlap of the slate when using Easy Slate?

No, Easy Slate can be installed using traditional slate headlaps.

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Do I need to install a VCL when using Permavent APEX?

A VCL is not required for non-ventilated cold roof installation.  For further design support please contact a member of the team. 

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Do I need to provide additional ventilation with a Permavent Vapour-Permeable Membrane?

Different membranes have differing requirements when it comes to ventilation. Please speak with a member of the technical team, who can help you find the right product for your design.

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Does the Plain Easy system work with Valley / Hip Tiles?

Since valley and hip tiles are manufactured to be used at standard pitches rather than low pitch the Plain Easy system would not be required.

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How should I fix the membrane?

Permavent roofing underlays should be affixed using clout nails. It's important that the nails are located beneath laps, to ensure that the underlay prevents water penetration.

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I am concerned that Easy Slate raises my slate. Will wind-driven rain be an issue?

No every slate is protected by the Easy Slate System, and water ingress is stopped even from wind-driven rain.

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I am using Easy Slate with Fibre-Cement Slates, how do I install the Copper Disc Rivet / Crampion?

Yes – please see image of copper disc rivet application with Easy Slate.

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I am using Permavent Vapour-Permeable membrane with Fibre-Cement Slates; should I install a counter batten?

Yes, in accordance with guidance provided by BS5250 and fibre-cement slate manufacturers.

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Is Permavent APEX cost effective?

Permavent APEX is extremely cost effective thanks to a unique integrated tape system that reduces waste, time and labour.

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Is a site visit / sign-off required for the guarantee?

A site visit is not a requirement for the guarantee, but images of the project before, during and after completion are necessary alongside the guarantee application. Read more about the Easy Roof System and Diamond GRP guarantees by clicking here.

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Is the Easy Valley Cap bolt-fixing installed at the top or bottom of the unit?

Please install Easy Valley with the fixing that holds the cap in place at the higher end of the strip.

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Is there a maximum rafter length when installing Easy Roof?

When pitched at 12 degrees, Easy Slate is approved for use with a maximum rafter length of 8 metres.

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Is your Easy Soaker range more cost-effective than lead?

Yes, Easy Soaker provides a cost-effective replacement for traditional lead flashing.

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What UK wind zones is Permavent APEX suitable for?

Permavent APEX is suitable for use in zones 1-5 (taped lap) and zones 1-3 (batten-restrained ≤345mm batten gauge).

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What is the drying out period?

The drying out period is the period over which the building dries. The building will have collected moisture during construction, especially if there has been inclement weather, as well as the materials themselves retaining some moisture. Once the membrane and roof is installed the internal area will begin to dry. This period can very in […]

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What is the minimum pitch for Easy Slate within a location classed as ‘Severe Exposure’?

As referenced in the Permavent BRE wind driven rain test report 273-259, Easy Slate is tested and approved as low as 12 degrees within areas of severe exposure.

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What is the minimum pitch for slates?

Easy Slate allows slates to be installed as low as 12°.

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What is the minimum pitch for tiles?

Minimum pitch recommended in BS 5534: 35° Plain Easy allows plain tiles to be installed as low as 17.5°

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What is the minimum recommended lap for APEX?

The majority of breather membrane manufacturers recommend installing their membranes with a 150mm lap (225mm for lower pitches). Permavent APEX Taped with double-integrated tape, has been tested and approved for installation with a 100mm membrane lap.

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Which of your Verge products should I use on a boarded / sarked roof?

When installing with no additional slating battens we advise using Easy Verge Trim.

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Need Some Help?

We've put together some commonly asked questions to give you more information about Permavent and the products we offer.