This valley has seen its better days but the critical spot carrying water past the image.
Using old flashing on roof.
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.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Install the first course of shingles.
Overview how to diy planning.
More roofing videos in this topic.
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.
Galvanized metal or aluminum is considered the best to use for roof flashing.
The gibraltar building products l flashing protects your home the gibraltar building products l flashing protects your home from moisture infiltration where your wall meets your roof.
Installing new flashing is a straightforward process on roof edges but counter flashing or step type flashing techniques are necessary around vents and vertical walls.
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.
Follow this old house online.
On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing.
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Here silva and the apprentices are installing architectural shingles.
The flashing is nailed to the roof and it is critical that the nail placement is proper or it will result in leaks.
But it doesn t work that way.
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.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
However there are limited circumstances where a roofer may decide to reuse flashing.
How to install ice melting roof cables.
Once even a small section of roofing cement fails you ll have a leak.
Old flashing may begin to fail before the new roof s lifespan is over.
What is roof flashing.
The remaining siding on the sidewall will overlap the step flashing and nail.
Flashing a humpy old roof valley requires a little give and take and a backup plan.
