A Nicholson Roofing, est. 1976
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New grey GRP flat roof laid between two tiled roofs
A new GRP roof between two tiled roofs, on one of our jobs

Flat roofing

Flat roofs in GRP fibreglass and bitumen felt

New flat roofs, replacements and repairs for dormers, garages, porches, extensions and bay roofs across Blackpool and the Fylde Coast.

Get a flat roof quote 07940 714766

01 Two systems

What's inside a flat roof

Show the layers for

Flat roof build-up: GRP fibreglass or bitumen felt A corner of a flat roof drawn in three dimensions with each layer cut back to show the one beneath: timber joists, decking boards, then either a glass-fibre mat laminated in resin with a coloured topcoat and edge trims, or a bonded base layer with a mineral-finished cap sheet. 1 2 3 4 56 3 4 56 Timber joists Decking boards Glass-fibre mat,laminated in resin Coloured topcoat Raised edge trim Drip trim at the edge Base layer,bonded to the deck Cap sheet with amineral finish Felt dressed upthe edge upstand Drip edge

GRP fibreglass

One seamless layer of glass-fibre mat set in resin, finished in a coloured topcoat and closed off with trims at every edge.

  1. 1

    Timber joists

  2. 2

    Decking boards

  3. 3

    Glass-fibre mat laminated in resin, one seamless layer

  4. 4

    Coloured topcoat, the finished surface

  5. 5

    Raised edge trim

  6. 6

    Drip trim, so water clears the edge

GRP fibreglassBitumen felt
What it isGlass-reinforced polyester: fibreglass matting set in resin over the deck and finished with a coloured topcoat, in one seamless layer.Bitumen roofing felt, bonded to the deck in layers and finished with a mineral-surfaced cap sheet.
Suited toDormers, garages, porches and similar flat roofs.Domestic and commercial flat roofs.
StrengthsDurable and lightweight. Weather-resistant, with no joints in the surface.Cost-effective and reliable. Excellent waterproofing.
UpkeepMinimal maintenance.Easy to maintain and to repair.

Not sure which suits your roof? We'll recommend one when we come to quote, and explain why.

02 Where they go

Flat roofs we fit, by type

All our flat roof photos
New grey flat roof over a bay, with Blackpool rooftops behind

Bay roofs

Flat and shallow bay roofs over front windows, re-covered in GRP, felt or lead.

  1. 02

    Dormers

    Dormer roofs and cheeks, like the front and back dormers in this review.

    Just had our front and back dormers felt removed and replaced with GRP by A. Nicholson Roofing

    Stephen RedfernGoogle review ยท GRP dormer roofs
  2. 03

    Between pitched roofs

    Flat sections and valleys tucked between slate or tile.

  3. 04

    Garages and porches

    Small roofs that take a lot of weather.

  4. 05

    Extensions

    Single-storey extensions, new roofs and replacements.

  5. 06

    Commercial

    Felt systems for commercial flat roofs.

03 Before and after

The same roof, replaced

A narrow flat roof between two tiled roofs: worn felt with moss and old patch repairs, stripped and replaced with GRP.

  1. 01Water still sitting on the roof long after rain
  2. 02Cracks, splits or blisters in the surface
  3. 03Moss and debris holding damp on the roof
  4. 04Damp or drips in the room underneath

Any of these? A small split can often be repaired. When the whole surface is worn, we strip it and lay a new roof.

Worn felt flat roof with moss, before
The same roof in new grey GRP, after
BeforeAfter

04 On Fylde Coast houses

Flat roofs, photographed on the job

Next step

Get a price for your flat roof

Dormer, porch, garage, extension or bay. A photo from the ground helps us quote, and the quote is free.

Get a flat roof quote 07940 714766
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