Deck Siding Flashing

Never put horizontal siding in direct contact with any horizontal material.

Deck siding flashing.

Fits over leger board and behind siding to protect from water damage. This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck. The flashing made of vinyl or galvanized. Galvanized deck ledger flashing fits over deck ledger board and behind siding for protection from water damage.

For example if the deck has. Install z flashing along the top edge of the ledger. Kickout flashing installs just like standard step flashing except that half of the kickout flashing hangs over the edge of the roof. Slip the back flashing under the siding at least 3 at the top and the sides.

You may need to pry out siding first. Required materials for this project aluminum nails bolts drip flashing j channel ledger board silicone caulk undersill trim z flashing. I advocate removing siding carefully so it can be reused. A simple metal or plastic cap flashing is probably adequate to flash a deck ledger in a dry climate while the 3 layer system described in this video is suitable for high rainfall and damp climates.

If you re just trying to buy a few years until a new deck can be built some tubes of high quality silicone caulk and whatever other tricks it takes to divert water to the face of the ledger can buy you some time. This is both greener and cheaper and it usually looks better to reuse old siding than to patch in new and try to match the existing finish. Painted galvanized steel features a baked on factory finish. The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.

Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in. Keep in mind the bottom of the upper siding should be at least two inches above the flashing or the decking that s near the house. Deck flashing diverts water runoff from the side of the building away from the ledger board which is the joist that s attached to the side of your house. The level of water resistance you need to achieve when flashing a deck ledger will depend on the rainfall and how dry your climate generally is.

Use asphalt paper between metal and pressure treated lumber. The flashing can then lap the top of a lower course of siding or the foundation so any water that does get into the joint will be directed outward. The horizontal leg should be wide enough to extend all the way. How to use flashing between vinyl siding and a wood deck 1.

Install the kickout flashing. If nails are in the way pull them out. That should pop the nail head out far enough so you can pry it out.