If you have a PVC single-ply roof on your home or commercial building, you'll want to check it regularly for punctures so repairs can be done. Hail or damage from walking on the roof can create tiny punctures that allow water to leak through and eventually cause problems with the roof deck. Fortunately, roofing repairs are fairly quick and easy for PVC membrane roofing. Here's a look at how a roofing repair service might repair your flat roof by heat welding it.
Holes Are Covered With A Patch
Holes on a PVC roof can be sealed with a patch. The patch is made from the same type of membrane as the rest of the roof. The patch is cut so it's a few inches larger than the hole to allow for overlap. Patches are usually cut in a circle so there are no pointed edges to come loose or get snagged on a shoe.
The Damaged Area Has To Be Cleaned First
The success of a membrane patch depends on how well the area is cleaned before the patch is applied. If dust and dirt aren't removed, the patch won't stick very well. The area has to be scrubbed with a cleaning solution and sponge and then allowed to dry.
The Patch Is Applied With A Heat Welder
Heat welding is done with a handheld hot air welder. This tool is fairly lightweight and easy to move around with one hand. The roofing repair professional holds the patch in place with one hand while moving the end of the welder around the patch with the other. The tip of the welder is placed under the patch so the patch and roof membrane are both heated.
Once the patch has started to stick, the roofer can use a small roller to push the patch firmly against the membrane as it is heating up. The patch is heated from the center to the edges all the way around the circle. The roofer makes multiple passes with the roller to ensure the patch has a good seal and will stick for a long time.
The Patch Is Tested
The final step is to check the patch to make sure there are no gaps or loose areas around the edges. This is done with a small metal tool the roofer tries to slip under the edge of the patch to see if the patch can be lifted. If the tool can slip in, the patch is heated further until there the edges are sealed tightly.
The Procedure Is Repeated As Needed
If you only check your roof once or twice a year, there could be multiple punctures that need to be patched. By patching all the holes that are found, your roof membrane will last longer and you'll avoid water damage to the roof deck and your house or building.
For more information, reach out to a local roofing repair service.