To waterproof a sloped roof you can attach felt over a thin plywood base and cover it with shingles or boards. The roof is more than just a lid for your treehouse!Īs mentioned above, a pitched roof looks better and is easier to waterproof than a flat roof, but it takes longer to make. Clearly, wood will survive a lot longer if it is protected from running water or even occasional wetting. The roof is what will make or break the treehouse over the long term. Boards do not have the same bracing effect as plywood because they can slide against themselves slightly, so you would need a rigid frame to begin with, possibly made of stronger materials. You can get round this by overlapping the boards, which also looks good. This could let rain and wind into the treehouse. These are simple to fit and cut, but the gaps between each board will close in winter and open in summer, due to the wood swelling in damp weather. Plywood does not normally look attractive, so wooden cladding boards may be better. It is also very strong due to the alternate direction of the veneers that it is made up of. I use plywood for the walls because it is available in large sheets which can be cut to size with a jigsaw. Treehouse books that will give you inspiration for the look of your treehouse and help complete your plans.This lets you use a house building book to help with the design of your treehouse. Since the frame is built on a flat wooden surface, rules as to its construction are exactly the same as for any ground based wooden house. This creates a very strong and rigid frame before you have even added the walls. However, you may want to cut holes in the floor and attach the uprights of the frame directly to the floor supports. The walls add lots of bracing and will make the frame rigid when they are fitted. This forms a strong joint but it will still be able to move until you put your walls on. I normally use brackets to screw the uprights of the frame to the floor. So long as the floor is big enough, you can make the frame any shape you like and then fasten it to the floor. It is much easier to work when you don't have to worry about falling out of a tree! I always find that pieces of wood that I cut and join together in the treehouse are not as square or accurate. That way you can use vices and power tools in your workshop. It is definitely better to pre-fabricate the frame, or at least parts of it, on the ground. Your plans need to show the height of the treehouse and where you are going to have to deal with obstructions like branches or a curving tree trunk.
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