Hardware and materials For Building A Treehouse

Hardware and materials supplies
Neoprene flexible waterproofing sheet

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Use to seal around branches and main trunks at roof level or through walls. This material is very flexible and allows the tree to move while still keeping rain from getting into the treehouse through gaps around roof and wall coverings.

EPDM flexible waterproofing sheet
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Used in a similar way to Neoprene (above), EPDM is a heavier, less stretchy material, but it is more resistant to UV damage and abrasion. This is a 10’x10′ sheet suitable for cutting multiple strips to seal around branches and main trunks at roof level or through walls. This material allows the tree to move while still keeping rain from getting into the treehouse through gaps around roof and wall coverings.

Geocel 4500 roof sealant

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This waterproofing caulk will stick strongly to a wide range of materials and provides excellent waterproofing and flexibility. Use around trunk/branch seals and to cover nail holes in felt roofing or flashing. This sealant is waterproof in around 2 hours.

Titan military grade 550lb paracord
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General purpose thin rope for lifting tools and lashing materials in position. Not suitable for climbing use. Burn cut ends to seal them and prevent fraying.

Rechargeable 1000lm LED flashlight
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Excellent value, very bright LED flashlight. Fits in one hand and runs from a rechargeable 18650 battery, or 3 x AAA batteries.

Hammock with fine insect screen

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Ideal hammock for sleeping out in the trees. Built-in insect mesh protects you from bites during the night and is more comfortable than a hard floor.

Bolts and fasteners
For treehouse supports you will be using a selection of heavier lag bolts and standard bolts that are weather resistant (galvanized or stainless steel). The house framing can be assembled with nails but screws are recommended, because of their ease of installation with a portable drill, their accuracy and resistance to loosening. Between all the bolts and screws required for a typical treehouse, it is easy to spend as much on hardware as on the wood, so calculate what you need in advance and buy in bulk wherever possible.

McMaster-Carr – eg ¾” lag bolts
Bolt Depot – eg ¾” lag bolts
Tacoma Screw – up to ¾” and 7/8″ lag bolts
Lippin Cott
Nelson Treehouse and Supply
Treehouse Supplies

BlueWater static rope

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Rope with low elasticity, used for rappelling (abseiling), lifting loads and when working while suspended. Can be substituted with cheaper polypropylene rope but braided climbing ropes are softer to handle and will accept knots more easily.

Sterling dynamic climbing rope

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General climbing safety rope. The rope can stretch to absorb some of the impact of a fall so is much safer than static rope. For situations where you will be working while suspended, a static rope should be used instead.

Petzl helmet

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Head protection from falls and impact with materials during treehouse construction.

Wide belt climbing harness
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Wide waist and leg supports to allow sitting, with plenty of places to clip in climbing gear and tools.

Screwgate carabiners
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Screwgate carabiners are recommended for all treehouse climbing, to avoid accidental opening. They should always be used when lifting materials.

Petzl Tandem pulley for zip lines
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Double wheels for stability and smooth running on steel cables. Can also be used on horizontal static rope to make a movable crane point for lifting heavy items into the tree.

Petzl single pulley for lifting loads
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Simple but effective small pulley that can handle heavy loads. Attach to a strap in the tree with a carabiner as a lifting point. With a second pulley attached to the load you can lift with half the effort.

Figure eight descender or belay device
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Mainly designed for rappelling (abseiling) down a rope, which is the fastest way down from a high treehouse, but can also be used to belay a climber from the ground or anchor a lifting rope to the ground to prevent it slipping back over the pulley.

You may also like to read Building a Treehouse with Children