Deck flashing

New construction inspection today; I don’t like this deck flashing as the builder uses the aluminum covering the skirtboard as his flashing. Ledger fasteners and joist hanger nails perforate the aluminum dozens of times. No membrane or ice/water shield behind the aluminum. You know the drill…builder claims it is to code (town uses the 2009 IRC). Buyer getting local code enforcement official involved. I wrote up that it wasn’t flashed properly and recommended correction. I welcome opinions (even if you don’t agree)

Why do those bolts look so small supporting the ledger ?

I like this:

Bob, Those are called ledger locks I believe. They are used in my area and are allowed by the local code guys. I have used them and they grip like hell.

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**R703.8 Flashing. ***Approved *corrosion-resistant flashing shall be applied shingle-fashion in a manner to prevent entry of water into the wall cavity or penetration of water to the building structural framing components. Self-adhered membranes used as flashing shall comply with AAMA 711. The flashing shall extend to the surface of the exterior wall finish. *Approved *corrosion-resistant flashings shall be installed at all of the following locations:

  1. Exterior window and door openings. Flashing at exterior window and door openings shall extend to the surface of the exterior wall finish or to the water-resistive barrier for subsequent drainage.
  2. At the intersection of chimneys or other masonry construction with frame or stucco walls, with projecting lips on both sides under stucco copings.
  3. Under and at the ends of masonry, wood or metal copings and sills.
  4. Continuously above all projecting wood trim.
  5. Where exterior porches, decks or stairs attach to a wall or floor assembly of wood-frame construction.
  6. At wall and roof intersections.
  7. At built-in gutters.

Larry has it down pat.











Hi Mark
That flashing should be copper too

What does aluminum do when in contact with treated lumber?

OK thanks.
Here is a link…

I know this is a week old but…

This deck is not flashed at all.
The purpose of the deck flashing is to divert the water away the structure and the ledger which supports half of the deck. In this case, water could still get into the structure through holes created by the ledger fasteners and nails.
A continuous deck flashing should be placed under the siding, over the ledger and extend past the joist hangers.
See page 11 figure 14