The instructable has been rewritten to reflect the rebuilding process, and there are a mixture of old and new photos throughout.
#Tree house sketch update
Update July 2014: The treehouse has been fully rebuilt. Amazingly enough, I was able to remove ALL of the lag screws, so when I rebuild I can reuse the same holes (and all the wood except for the 2×8s). The tree started to open some joints, cracks had appeared in the main structural supports, and the washers were embedded in the wood. Update October 2013: Growth got to the point that I took the treehouse down for safety reasons. It's just big enough for two single air mattresses, so it's fun to sleep out in, too. We've made a few updates over the years, adding a pirate's treasure chest, a swing, a braided climbing rope, a BEWARE sign we use out front at Halloween, and it's well-equipped with Nerf guns & water pistols. Update May 2013: I'm happy to report the treehouse is four years old now, it's suffered no damage from windstorms, snow, or tree growth (yet.), the trees are healthy, and it still gets lots of use. ft.) haven for the kids they love it and so do all their friends. I used 10" bolts for the trees with one bolt in them, and 8" bolts for the tree with two bolts in it.
When I rebuilt the treehouse with 3/4" lag bolts, I gave it about 1/2" to grow on either side. The longer you want your treehouse to last, the further you should perch the support away - and the more substantial your lag screws ought to be! I know my tree grew only by about 1/4"-1/2" in diameter over 4 years, but most trees grow faster than this. The space you're giving it to grow is the gap between the support and the tree. Use washers, and don't bolt hard against the tree. If your trees move appreciably, and/or if you're planning to build higher up, use a sliding beam support).ĭrive the screws through the holes in the boards and into the tree with a wrench. The slot allows the trees to move without tearing your treehouse apart - the more your trees move, the longer the slot ought to be (note that the slots I cut are only about 2" long, but these trees don't move perceptibly at the height of the treehouse, even in a strong wind. Get a jigsaw and make two cuts between the holes to make a 2-4" long slot. Now drill two 3/4" holes, each 1-2" either side of your mark and both in the middle of the board. Make another mark using the between-the-holes measurement. Drill a 3/4" hole in the middle of the board. Subtract this distance from 6' (not 8', unless you don't want the entrance platform), halve the remainder, and make a mark this distance away from one end of your 2×8. Now, take down the strips and measure the exact distance between the holes. Do the same on the other side of the trees, this time taking the extra precaution of first ensuring the new strip is not only horizontal but also level with the strip on the other side of the tree. Drill 5/8" holes straight into the tree just above the strip of wood. Get it perfectly horizontal with the help of a level and nail the other end to the other tree. Get a strip of light wood and nail one end to one of your trees at a height about 1 ft lower than you want the floor of your treehouse (to save a future concussion, it should also be at least 1 ft higher than your head!).
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