Why Some Tile Roofs Leak
There are four common problem areas in the construction of tile roofs.
1. The ridge of the tile roof is left open to rain.
- The national Roofing Contractors Association (NCRA) and most manufacturers recommend that grout or other closure device be used to seal this exposed location.
2. Open headwalls can be a source of leaks in a driving rain.
- Flashing and counter flashing as well as a grout closure are critical to provide a weather tight seal.
3. Roof penetrations installed without flexible flashing.
- The principal concept is to make sure that any flashing is flexible enough to be "shingled" (lapped) into the tile assembly.
4. Eaves should shed water, not collect water.
- Any water that gets under the tile surface should have a way to shed off the roof at the time eave rather than being dammed at the roof edge.
Consult manufacturer's recommendations for the specific tile product.
Information provided by Building Analysts, a full-service architectural and engineering firm with many years of experience in construction litigation. Their services include: architectural and structural investigations, repair recommendations, preparation of exhibits and expert testimony. Contact Building Analysts Toll Free at: (800) 352-1497.