We are in the process of selling our house and the deck has already been built. The inspector stated that we needed to install deck flashing between the house and the deck. I have reviewed deck flashing information but wonder, for those of us who are not mechanically inclined, how hard is it to install deck flashing and approximately how much does it cost? Can you buy deck flashing in any hardware store? The siding on the house is Hardboard. Will it be difficult to get behind the home siding (since everything I have read states to put the deck flashing about 3 inches behind the siding). Will the home siding have to be removed or can the deck flashing just be slid up behind the siding? I cannot seem to find a picture anywhere of what deck flashing looks like. Answer: When installing a new deck onto your home it is critical to install deck flashing between the home and the deck.
Not installing deck flashing will leave your home susceptible to water, mold, and insect damage as rain run off will seep behind the deck ledger board and up against your home. There is also a Z-shaped deck flashing type that is sometimes used, but you really should use the rolled stuff as it is wider and will allow you to extend it up further behind the siding. Pressure Treated Decks and How to Install Flashing on a Deck If your deck is constructed out of pressure treated lumber you should use a copper based deck flashing to prevent the deck flashing from corroding. Today, pressure treated wood is impregnated with higher percentages of copper than in the past. Older types of flashing made from aluminum or galvanized metal will react with today’s treated lumber and actually corrode over time. Get free quotes from local deck contractors. Installing deck flashing is not that difficult to do, even if the deck is already built. You will need to remove a deck board, or a section of deck boards pending if the deck boards run parallel or perpendicular to the deck ledger board.
Also, make sure nails are not punched through the deck flashing so that it defeats the purpose of it. Sometimes to achieve this you may need to put in an additional joist to act as a nailer for the reapplied deck boards. For help on building a deck and how to install flashing on a deck, see HomeAdditionPlus.com’s Deck Installation Bid Sheet. The Deck Installation Bid Sheetwill teach your how to hire the right deck contractor, and help to ensure that your deck project is completed on time and budget. Related Information
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price estimate. How much does it cost to install deck flashing?The average cost to repair deck flashing is between $15 and $30 per linear foot.
Is flashing necessary for deck?Even with a concrete deck, flashing is necessary since corrosion can occur on the metal fasteners that hold your deck together and the place of contact between the deck and the house is still an area that can be damaged.
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