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the permanent roof
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Permadeck with  soft single ply systems

E&OE      The text and graphics of this website are Copyright © 1996-2015 all rights reserved by Seamless Roofing Ltd.  Permadeck, Thermadeck & Flexiroof are registered trade marks.  The contents of this website are subject to review and are a guide only and do not represent a binding offer. The BBA logo is Copyright © British Board of Agrément.  

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Compare the market!

We’ve seen many systems advertised as the ‘Ultimate Roof’. Check out this table and decide for yourself which deserves that accolade!

System feature

PERMADECK®

Single layer plastic and rubber systems, eg Sarnafil, Alwitra, Evalon, Sika Trocal &  EPDMs

'HighPerformance' felt

Seamless everywhere?

Yes

No (1)

No

Moulds around complex details?

Yes

No (2)

No

Integral edge trims?

Yes

No

No

Resists cutting?

Yes

No

No

Resists abrasion?

Yes

No

No

Anti-slip version for balconies?

Yes

No

No

Hard roof (will accept loads or ladders)

Yes

No (3)

No

Heavy ballast stones?

Never

Often

Chips

Choice of colours?

Any colour (4)

No or very limited

No or very limited

System wall flashing?

Yes

No

No

Shrinks over time?

No

Some do especially EPDMs

No

Fire rating BS476/3 Ext FA-A ?

(Highest fire rating as required by many Local Authorities & insurers)

Yes

No (5)

No (5)

Specialist needed to repair?

No

Yes

No

Material AND labour guarantee?

Yes

Material only

Material only

Please note these are general comparisons and individual systems may be better or worse in some areas.  E&OE



  1. Can be seamless on simple roofs. Welded or glued seams required at details like rooflights, vents, soil pipes, corners, internal gutters, level changes, adjoining structures, parapets, water tanks, flue pipes, chimneys etc.
  2. Some can be crudely heat shrunk though this can affect their life
  1. Some can be glued to plywood
  1. Some pigments are less colourfast
  1. Most can only meet this requirement with heavy covering of river stones or granite chippings, without this some materials are as poor as Ext FA-C.

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           info@seamlessroofing.co.uk

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