Roof repair cost. Minor roof repairs cost $150 to $400 to fix shingles, flashing, or patch small leaks. Moderate roof repairs cost $400 to $1,000 to replace flashing, valleys, shingles in a 10'x10' area, or leaks with water damage. Extensive damage costs $1,000 to $3,000 to fix a sagging roof or leaks with structure repair. First, apply a liberal amount of roof patch to the problem area, and use a scraper to cover the entire area in an even coating. Once this has had time to dry, you should apply caulking around the edges and any holes to ensure it is sealed and waterproof. You could consider applying the roof patch tar to a shingle or piece of timber to provide I spoke with a roofing guys, he said that tiles work as a first barrier, then the membrane/felt layer needs to feed any water that reaches it into the gutter. He quoted me £14k for a new roof, he said if I wanted a membrane (he called it EPS treatment) it would be £4k. I looked into scaffolding hire and it's about £1500. Although most roof leaks can be solved with a simple fix, the price to get it repaired can vary. On average, the cost of repairing a roof leak ranges between $400 and $1,000 . For a minor to moderate issue, expect to pay around $750 on a shingle roof that requires shingle replacement and patching. 3. Seal siding from water by applying a plug of elastomeric caulk to small surface cracks. 4. Caulk siding leaks around doors and windows, but be careful not to seal up window weep holes. 5. If leaking occurs along the siding’s J-channel trim, caulk under its edge at a 45-degree angle. 6. 6. Roof Leak. If your house has recently been through a major storm, or you’ve had roof work done, a new leak may be caused by damage to the roof itself. When water leaks through drywall We can help determine whether you’ll be able to make an insurance claim, repair the damage to your roof, or replace the roof altogether. In the meantime, if you’re in a pinch, here are 4 temporary fixes for a leaky roof you can try. Polyethylene Plastic Sheets. Water Proof Tarps. Tar Paper. Visit us at: eG5l4TU.