Home Detailed application Technical Detail General Advice When Repairing/Recoating a Diamond Roof

General Advice When Repairing/Recoating a Diamond Roof

Repairing a GRP roof

If the roof surface becomes damaged by impact or has to be cut for any reason it can be easily repaired using the following procedure:

  1. Clean off the damaged area with solvent and abrade the GRP surface with 40 grit sandpaper or with a hand grinder if necessary for a distance of 100mm from the damaged area or edge to be joined.
  2. If repairing the surface cut the 450/600gm2 glass to the correct size to cover the affected area and mix sufficient resin with catalyst as previously described.
  3. Brush resin onto the area to be laminated at the rate of 1 kilo per square metre. Place the glass over the area, wet out the glass with resin at the rate of 0.5 kilos per square metre. Stipple well with the brush or use a paddle wheel roller for larger areas.
  4. Ensure that the laminate is free from air and completely consolidated and allow to cure.
  5. Mix the Topcoat with catalyst as previously described and apply with a brush at the rate of 0.5 kilos per square metre.
  6. Allow to cure.

This procedure will ensure that the patch or joining piece applied will bond to the original laminate and form a weatherproof patch over the damaged or cut laminate.

Recoating a GRP roof

  1. Thoroughly clean the area to be re-coated ensuring it is clean, dry and free from debris. Powerwash if possible.
  2. Abrade the area thouroughly with 40 grit sandpapaer until you can see some of the laminate underneath, you do not need to remove all of the topcoat.
  3. Brush any of the removed topcoat off the roof and wipe down the area with an acetone soaked cloth.
  4. Coat the area with a thin coating of catalysed resin.
  5. When the resin has cured enough to walk on coat the area with catalysed topcoat.

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