![]() ![]() If you notice significant rotting in any areas of the frame then this will need to be repaired or replaced before you go any further. ![]() Once you’ve done this, carry out a thorough inspection of the wood deck framing and check for rot. You can then take some of these wood deck boards and use them to create a temporary block line. Then, follow the steps below to safely and effectively install composite decking over the wood deck.įirstly, use a pry bar and remove the boards from your old wooden deck. You will also need to remove your deck railings balusters before you get started. However, you need to take the time to make sure that you do it correctly to avoid any issues further down the line.īefore you begin, make sure that your wooden deck is clear of any obstructions such as garden furniture. Installing composite decking over existing wooden decks is fairly straightforward. How To Install Composite Decking Over An Existing Wood Deck This could lead to the composite decking boards collapsing at some stage. If you lay a composite deck over a very rotten wood deck then the composite deck boards and the substructure may also start to rot. If there are many areas where the wood is soft and pushes in easily, then it will most likely need to be replaced. If the wooden deck is too rotten and decayed then you will have to consider replacing it with a new composite deck rather than laying one on top of it.Īn easy way to check the level of rot and decay in your wooden deck is to push into several wooden decking boards with a screwdriver. This means that building a composite deck over decks made from these woods shouldn’t compromise the longevity of the composite decking. Woods such as cedar, mahogany, and redwood are the most rot-resistant types. It’s also beneficial for you to make sure that you check the type of wood that was used to construct the existing wood decking. If the existing deck is rotting badly then this will lead to moisture being trapped underneath the new composite deck which will lead to further rotting. Composite decking is very rot-resistant but the substructure needed to support it may start to rot when exposed to a rotting wooden deck over time. If the existing wood deck is very rotten then it is unlikely that you’ll be able to lay composite decking boards over the top of it. Some timber deck boards have bigger spans, so you may find you will need to add extra timbers to reduce the centres to 400mm. You’ll need to consider the amount of decay in the existing deck, how long it’s been in use and the type of wood that was used to build the existing deck.Īnother important factor is the distance between joists, our composite boards are recommended to be installed at 400mm centres. Remember that the condition of the existing deck will directly impact the new composite deck that you lay on top of it. However, before you begin the installation process there are several important factors to consider. So, we’ve established that it’s fine to install composite decking over existing wood decking. ![]() Things To Consider Before You Install Composite Decking Over An Existing Wood Deck We’ll also closely examine the pros and cons of doing so, to get you up to speed. In this article, we’re going to take a look at how to lay a composite deck over existing wood decking. Although there are some risks to this approach there are also many benefits. However, it’s relatively easy to lay composite decking over an existing wooden deck. This would mean ripping out all of the wooden boards and their foundations and then laying an entirely new deck from scratch. If you have an existing wooden deck that’s looking a bit tired and damaged you may be considering replacing it with a composite deck. ![]()
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