Grp Roof Delamination

A properly laid glass fibre grp roof will last for at least 30 years with no measurable deterioration.

Grp roof delamination.

Immediately the mind thinks of the worst possible problem that it can be like a crack in the roof laminate or delamination between the fibreglass and the roof decking. This is a liquid roofing system which uses fibreglass matting topcoat and resin to form a waterproof barrier. A flat roofing system comprising of a cure it grp laminate with cure it topcoat when tested to bs 476 3. The roof was boarded in exterior ply and this got wet prior to the fibreglass being applied although the contractor dried it off with a blow torch type device.

Delamination of the grp panels had been observed during installation on the casino and mice building roofs. Traditional wet laid grp roofs where liquid resin is applied directly to a timber substrate before having the glass reinforcement incorporated insitu can provide extremely tough reliable and durable roofs that will outlast any thermoplastic or elastomeric membrane. 20 year guarantee roof leaking after just 3 years. Finally roofs on special purpose buildings that generate significant levels of humidity such as freezer facilities or indoor swimming pools are inherently prone to delamination.

Fibreglass roof delamination repair or replacement we had an extension built late last year which has a flat fibreglass roof. In particular it was alleged that the inner skins of the grp panels were coming apart from the aluminium honeycomb core. If a flexible grp roofing system like fibrelast was used. 2004 was designated ext f ab no limitations on use.

The steps outlined below are for a standard flat roof repair. The best fix in most situations is to simply replace the delaminated material with new membrane. This guide relates only to the application of the grp laminate and top coat. The resins and top coats should be suitably for use in roofing.

This can be caused by a wide range of problems including applying the materials on roof decking not specified for use with the system ie plywood or chipboard instead of osb3 damp roof deck at the time of lamination or incorrect catalyst ratios. F aa rating is available with the exposed aggregate finish. Surveys were carried out and delamination was allegedly found to be. Now because i installed the roof myself i know it was done by the book and the weather and materials were ideal so it was a bit of a mystery i have to say.

The roof must be laid onto a dry deck in dry conditions at a temperature not below 5 c. Resistance to wind uplift the cure it grp roofing system is fully bonded to the roof substrate.