Using Old Flashing On Roof

Flashing a humpy old roof valley requires a little give and take and a backup plan.

Using old flashing on roof.

However there are limited circumstances where a roofer may decide to reuse flashing. Install the first course of shingles. L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface. But it doesn t work that way.

Follow this old house online. This valley has seen its better days but the critical spot carrying water past the image. The remaining siding on the sidewall will overlap the step flashing and nail. More roofing videos in this topic.

They extend the course 3 8 1 2 inch past the starter course then nail in place then install step flashing then the next course and so on up the roof. The flashing is nailed to the roof and it is critical that the nail placement is proper or it will result in leaks. On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing. How to install drip edge and step flashing.

What is roof flashing. Overview how to diy planning. Old flashing may begin to fail before the new roof s lifespan is over. How to install ice melting roof cables.

Roof flashing is a material used as a protectant against water leaks or seepage and is typically made of galvanized metal but it can also be in the form of aluminum sheet metal copper or even plastic. Galvanized metal or aluminum is considered the best to use for roof flashing. In fact after diagnosing roofing leaks for 15 years i can tell you that roofs rarely leak in the field of the shingles 90 of the time they leak where the roof stops starts or changes direction which means most of the time the problem is with a flashing. More roofing how to diy in this topic.

Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. How to install a copper roof. Here silva and the apprentices are installing architectural shingles. Once even a small section of roofing cement fails you ll have a leak.

Using proper flashing components and maintaining penetrations like skylights are critical to the performance of the roof as a system newer technology in flashings and roofing materials not to mention product performance levels has improved greatly in the last 20 years and flashing components need to be consistent with the new roof.