JB Wholesale Roofing & Building Supplies | Roofing Services in San Bernardino, CA 92401

For our local climate, we recommend high-quality synthetic underlayment. It offers superior resistance to tearing and UV degradation compared to traditional felt, which is crucial given our sun exposure and temperature swings. This helps create a more durable secondary barrier against water intrusion, directly addressing the common issue of underlayment breakdown.

For an effective temporary repair until a professional can assess it, you'll need roofing cement (or a specialized leak sealant), a putty knife, roofing nails, and a piece of metal flashing or a shingle patch. We can provide all these items and guide you on safe application to mitigate water damage. For a permanent fix, proper diagnosis of the leak source is essential, and we can supply the correct replacement materials.

Absolutely. Flashing is critical in these high-risk areas. We stock a variety of step flashing, valley flashing, and pipe boot flashings made from durable metals like galvanized steel or aluminum. Using the correct flashing, combined with a quality sealant, is the best defense against leaks at these common penetration points, a frequent cause of post-rain water issues in San Bernardino homes.