Concrete is prone to a variety of problems such as cracking, spalling, scaling, and crazing because of its moisture retention and porous properties. This regular wear and tear makes fixing a concrete roofing system important.
Here are the things you need to know and do when handling concrete roof issues and repair.
1. Find the exact location of the source of leaking
When your roof is leaking, chances are good that the real source of the leak is somewhere else. Fixing just the spot above the leak is only a short-term solution. So inspect not just the roof but also your plumbing lines like the drainage pipes to get to the root cause of the leak.
2. Waterproof your roof
Water leaks are among the most frequently encountered issues in flat concrete and concrete tile roofing. Cracks on the roof are the likely culprits, so a quick fix is to fill them with waterproof cement, sealant, or any caulking materials.
Even if your concrete roofing has no cracks, it is still at risk of leaks because concrete can retain moisture. So it is best to waterproof your whole roofing system. Here are the steps:
- Using a pressure washer, wash your whole roofing surface.
- Fill cracks with roofing cement.
- Apply a good primer and let it dry.
- Apply an elastomeric sealant to the cracks and to the whole roof.
- After 24 hours, apply a second coat of sealant.
3. Replace your roofing felt
You can repair leaks in concrete tiles by adjusting the position of the cracked tiles. Aside from that, do not forget to check below the roof surface. You may also need to replace old and cracked concrete tiles, re-caulk any exposed nails, and take out all the tiles and adjust their position.
If you have done all these steps and the leaks still persist in your roof, this is a sign of an old or damaged roofing felt. In that case, the roofing felt has to be replaced.