San Gabriel
Flat Roof Replacement in San Gabriel: what actually fails
On the older properties the flat section is usually an addition built onto a much older house, and the junction where it ties into the original pitched roof is almost always where the water gets in. Two roofs built decades apart to different standards, joined at their weakest point.
There is more low slope per property here than in most of the valley, because there are more added-on structures. Rear additions, converted garages, carport roofs and patio covers are all low slope, and all of them shed water slowly enough to depend on the drainage working rather than on gravity.
- Which deck you have, because the oldest stock is skip sheathing
- Whether the tile profile is still manufactured
- The junction between the original roof and any addition
- Whether an overlay is even viable on what is up there
