Question: Flashing Where Roof Meets Siding?

Question: Flashing Where Roof Meets Siding?

Does roof flashing go under siding?

In certain instances flashing may need to be installed on the exterior of siding. However, in most instances, step flashing should be installed “ behind ” siding. It is always recommended to install step flashing behind stucco, Dryvit, wood panel, lap siding, vinyl siding, cedar shingle siding, etc.

How do you install flashing under siding?

Fold the roof side of the flashing down over the facing board along the roof line. Bend the vertical edge at about a 45-degree angle to make a tab to “kick out” water, away from the wall and over the bottom of the roof. Nail the flashing to the wall with two galvanized roofing nails and a hammer.

How do you flash a roof against wood siding?

The only way is to cut a groove in the siding and flash the roof wall intersection. Or pull the nails out of the closest layer of siding and slip the flashing up under it, and hopefully under the moisture barrier.

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What are the different types of roof flashing?

4 Types Of Roofing Flashing

  1. Drip Edge. Along your roof’s edges (eaves), drip edge flashing is necessary to prevent water from an overfilled gutter from pushing its way up the edge of the roof underneath the shingles.
  2. Valley Flashing.
  3. Vent Pipe Flashing.
  4. Step Flashing.

What is roof flashing used for?

Roof flashing is a thin metal material that roofers install to direct water away from certain areas (walls, chimneys, roof valleys) of your roof. It’s a crucial roofing material that every roof needs to have.

Should I roof or siding first?

Roof always goes first on a renovation That way the roofers can’t damage new siding or windows when ripping off the old roof. Windows usually go in before the siding that way they can be flashed and sealed properly. Siding and exterior trim goes last out of those 3.

Should I replace my new roof with step flashing?

It is critical that flashing sizes correspond with the size required by the new shingle product. Step flashing length must correspond to the design and size of the new asphalt shingles. If the new shingles require a different size flashing, then the existing flashing must be replaced regardless of its condition.

How do you seal roof flashing?

Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. Use special masonry caulk to seal the joints between the flashing and the chimney. Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound, as shown at right.

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Do you need flashing at bottom of siding?

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. 8-inch minimum between siding and grade.

Does flashing go over or under house wrap?

Flashing always goes under the housewrap. It’s your final line of defense against water infiltration. If (somehow) water should find a path behind the wrap, the flashing is there to divert it away from critical access points.

Does house wrap go over flashing?

Be certain that the window flashing leads water over the house wrap (not behind it) at the ends of the window. The use of rigid plastic foam sheathing is also becoming more common in residential construction. If you tuck window flashing under the foam sheathing you may create a leak.

What is counter flashing in roofing?

Counterflashing – Formed metal or elastomeric sheeting secured on or into a wall, curb, pipe, rooftop unit, or other surface to cover and protect the upper edge of a base flashing and its associated fasteners.


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