Cleaning & Maintenance of a GRP Roof

Home Roofs Cleaning & Maintenance of a GRP Roof
fibre glass roofing

GRP roofs, or fibreglass roofs, are superior and much more resistant to heat, fire, and moisture than alternative flat roofing materials. They require much less maintenance as a result, but that doesn’t mean they require none. Here, we’re going to look at how you keep your roof in top shape, so it can last the fully fifty years of its expected lifespan.

Cleaning your GRP roof

First of all, if you want to maintain its “good as new” appearance, then a little cleaning is necessary from time to time. If you can safely access it, then the simplest way to do that is by simply using a long-handled mop and a bucket. A garden hose is just as effective. If you’re using a pressure washer, avoid using one that uses hot steam as this can impact the longevity of the roof. Otherwise, any method should work from removing mud, dirt, and debris from the roof.

Coating your GRP roof

Applying new layers of coating to your fibreglass will keep it as effective at insulating and protecting the interior from moisture. If you notice any problems with pooling water, it’s a sign that your roof could use a new coat. Gel coat and acrylic paint are both effective, but while gel coat is easier to apply, acrylic lasts longer.

If your roof is new, it only needs to be sanded in preparation. Otherwise, look into guides about how to disinfect and strip the roof before treating the underside for oxidation. If there are any cracks or holes, they need to be filled as well.

For gel coats, you simply need to load the gun with the coat and apply it as the directions on the packaging state. Spray one heavy coat, making sure that it’s even. After ten minutes, when the coating is tacky, apply the second, thinner layer. Let that dry before spraying on a third, final layer. Once it has hardened completely, sand the top to level it out. Then, use a latex brush to apply the latex primer. Once it has cured, sand it down to level the surface and vacuum any powder leftover.

If you’re using acrylic coating, it should be applied with a paintbrush or roller brush over the latex primer. Start with a thin coat, layering it thicker over the top for a second and third coat. Make sure you allow each coat to dry before you apply the layer on top of it.

Does your GRP roof need any more maintenance?

Besides cleaning and coating your roof, it needs no maintenance whatsoever. GRP is a much stronger and more resilient material than felt or bitumen. As a result, it should only require further work if you spot something wrong with it.

Be sure to keep an eye out for any problems such as pinholes in the surface or the roof, or warp and cracks. This could mean that your roof is in need of a replacement. If you’re in need of a new GRP roof, get in touch with Gee GRP and let us take care of it for you.

In our previous articles, we have described some common problems with a GRP Roof. Read GRP roofing problems

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