Glass Fibre Roofing FAQ's
Q: Once flow coat has been used, is it possible to bond to the wax-modified resin if changes or repairs are needed to the structure?
A: Yes it is possible, you need to clean the area thoroughly (preferably using Acetone) then sand back the surface before carrying out your repair.
Q: We have a flat glass fibre roof with a 3" gutter running from the middle sloping slightly to both ends of the roof where there are drainholes. When it rains heavily, the rainwater pools within the gutter because of a slight dip. This is causing a leak though the roof. Can you suggest a material which i could use to fill the dip and stop the water from pooling and so hopefully it will drain away more quickly. Unfortunately the previous owners have tried to apply a waterseal paste to the gutter, but this has not worked.
A: You will need somebody to look at this problem before commenting... If the water has already come through the roof you could have problems that cannot be seen from the outside. Layers of Glass Fibre can be laid into the dip to bring the area to the same level, but you may be covering up a problem. Please call our offices if you would like to discuss the problem in further detail.
Q: I have covered one of my flat roofs, I have others to resurface this year. It was not supplied from yourselves (I was not aware of your company until recently.) The materials used were top grade and were not of the re-mixed / reclaimed type. The roof area was completely stripped and re-laid with 19mm wbp ply screwed down onto the rafters at 150 mm intervals. Two layers of 400 csm were laid with a layer of tissue on top. All consolidated at the same time. This was finished with a wax gell coat the same day. The weather was hot, so hot I had to stop work at midday for 2 hours. Although the roof looks superb, I have noticed that after three years, there are fine, long sweeping cracks,about 6 in total on a 3 x 4 metre area. some run into each other, some just start and finish without running into a corner detail or change of profile direction. they are all on the flat section of the roof, none follow or aline with the wbp ply joints. At first I thought the cracks were only in the gell coat but having scraped back the gell coat to the csm the cracks go though the csm thickness ! the original supplier can?t shed any light onto this, and despite my enquiries, nor can any one else. I feel sure this must have happened before. can you give any indication to the the cause ? I like the grp system for the other areas, needless to say I will not be purchasing from the same source. I need to understand and resolve this before I proceed.
A: I have never heard of this problem before - The only time that this can happen is when the underside of the fibre glass has had impact and this is very unlikely where a roof is concerned. Is the roof dropping at one end?
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