Greengates Builders Merchants

GRP Flat Roof System Available From Greengates Builders Merchants Accrington, Lancashire

GRP stands for Glass Reinforced Polyester.­  GRP is also known as Glass-Fibre. This system is cold applied on site, giving it a seamless and flexible weatherproof finish that resists water, heat and frost. GRP is a fully integrated all in one system where the components work together on virtually all types of flat roofs and vertical surfaces in any domestic or commercial application to provide the perfect all weather protection.
 The resulting surface gives a strong archi­tec­tural finish that looks very impressive. If maintained properly it will last as long the building stands. Cromar have developed this technology further to produce the perfect all weather protection for any flat roof. PRO GRP can be applied in small domestic situations right through to large industrial envi­ron­ments.

  • Cold applied - no heat required
  • Easy to form around complex situations
  • Very durable - resists heavy foot traffic
  • Non-slip walkways can be incorporated
  • Class leading roofing solution that far exceeds traditional methods
  • Virtually Maintenance free for very long periods of time
  • Impact Resistant due to its ultra hard finish
  • Fire retardant
  • Highly economical solution
  • Storm Proof
  • Frost Proof


Ensure all debris and tools are removed and the roof is swept clean and completely dry, cut the matting for detailing work. Prepare bandage for sealing all trims to new roof deck, roll out and cut the mat for the whole roof surface remembering a 50mm overlap. Roll up strips of mat and place together, lay out first strip of mat along the highest point and continue to overlap each strip by 50mm. Prepare tools needed for procedure, application rollers, metal laminating rollers, brushes and buckets.


Beginning at the highest edge, apply the catalysed resin to 1m² of roof, lay the leading edge of one of the earlier cut strips in to the resin and unroll the first square metre. Impregnate the mat you have unrolled before continuing to repeat the process along the length of the strip of mat. When laminating the main roof area, never mix more than 10 litres at a time, less in warmer weather, this will ensure you DO NOT risk the basecoat resin going 'off' and becoming unusable.

come along to our Whalley Road Yard
And Get Your GRP Flat Roof System Today

Greengates Builders Merchants delivering to the whole of Lancashire including: Accrington, Blackburn, Burnley, Clitheroe, Darwen, Great Harwood, Haslingden, Padiham and Pendle.

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