What size should step flashing be?
Table of Contents
What size should step flashing be?
4 inches by 7 inches
Step flashing needs to turn up a minimum of three inches up the sidewall. The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck. The 7-inch length ensures a 2-inch headlap on each course. Once complete, the housewrap should overlap the step flashing that’s applied to the wall.
Does counter flashing cover step flashing?
We install counter flashing on brick/masonry walls above the roof surface to cover the top of other flashing, such as step flashing. This directs the flow of water away to prevent leaks. Flashings should always overlap so water does not run behind the top of the flashing and get into the building.
How many inches should flashing overlap?
When more than one length is needed to span across the bottom of a wall, overlap pieces at least 8 inches. The flashing must include a drip-edge to direct any water that runs down the drainage plane away from the bottom of the wall.
Does step flashing go over or under shingles?
Instead of installing the step flashing between shingles, the flashing rests on top of the shingles. It’s not unusual to see sealant installed when sidewall flashing is missing. Sealant will eventually dry, shrink and crack. You’ll see sealant substituted for flashing in a lot of different areas on roofs.
What size drip edge should I use?
Metal Edge Drip: A drip edge has to be resistant to possible corrosion and should be 36 gauge or larger.
How do you install step flashing?
Here’s how to do it right the first time:
- Cut step flashing pieces to be 10 in. wide and 2 in.
- Nail flashing to roof deck only. Nail through flashing into shingle, do not extend flashing above top of shingle and nail, or flashing will angle up.
- Cover tops of step flashing with house wrap and siding.
Does counter need flashing?
Counter flashing is very important anywhere you have brick on a home. This is usually on the roof and chimney areas. With this in mind, sometimes it is not installed or it wears out quickly and needs replacing. In general, the idea is to always keep water outside of the home.
Is wider drip edge better?
Thicker is better, but you don’t hem it. One practical conclusion suggested by this study is that drip edge performance can be improved by increasing the thickness of the metal drip edge so that it does not require a hemmed edge.
Does step flashing go under shingles?
Step flashing consists of short pieces of flashing, each installed to overlap the shingle in the course below, and to be overlapped by the shingle in the course above. All shingle manufacturers require step flashing at sidewalls for both asphalt, wood and slate.
