![]() ![]() The small domes are 14 feet and are made of ABS plastic, which is a really safe plastic (the same plastic the LEGO is made of). Some sensitive people say fiberglass needs some time to offgas (1-2 years or more) and others find it OK fairly soon after production. The larger domes are made of a fiberglass composite material that the company says does not emit an odor. These cool Intershelter domes are easy to transport and assemble and have a lifespan of 30 years. You can see a video tour here and you can check one out on Airbnb. This is a simple, mostly metal kit that you could then customize to be chemical-free on the inside. The large overhangs are also superb protection from rain over the windows and doors on the ends. And I would not use anything with an exterior metal or fiberglass vapor barrier in a heating climate myself. This could work for preventing mold, but I don’t think anything with a metal exterior is a good idea in heating climates, it’s far too dependent on spray foam holding up perfectly or a plastic barrier holding up perfectly. Plus spray foam offgasses too much for chemically sensitive folks.Įither closed cell (2 part) spray foam is used to form an airtight vapor barrier in any climate where you heat, or not quite as foolproof is rigid insulation installed with canned (1 part) spray foam). Spray foam could pull away from the skin. It’s risky though to use anything with an exterior vapor barrier (no rain screen) in a heating climate. Spray foam, while it does offgas, is a vapor barrier and the best bet for insulating metal walls in heating climates. In this design, you can use spray foam insulation (with or without rigid foam) without worrying about exterior leaks getting in behind. What I like about arched cabins is that there could never be any leaks with this one-piece roof/siding. The basic kit for Arched Cabins includes floor plates, ribs, ridge beam, standard R13 insulation, Super Span Roof Paneling, trim, and fasteners needed to assemble the cabin.Īrched Cabin kits do not include the foundation, installation, interior, end caps, or delivery. Using a rot-resistant wood and no need to worry about the foundation type simplifies everything here. I like this simple option if you don’t need insulation. The plans for the treehouse include a 3-hour consultation. Wooden Treehouseįrom Out N’ About, a company that rents out treehouses, and sells plans and parts, this 16′ Treezebo Hexagon could be a great non-toxic home. That is how I would detail it for mold prevention. Exterior foam insulation would also be a fool-safe method to prevent possible condensation within the air pockets of the wood wall. To hit codes you will need to put exterior insulation on it. If you tolerate wood there is nothing else in the interior. I think this house is very promising but needs more investigation. I have a more in-depth review in the general prefab post. The roof will not be all wood, there will need to be another roofing material there. The walls, floor, and ceiling are all wood, no glue, no nails. The Holz100 homes come in all sizes from very very tiny, small, and large. ![]() Every detail matters for mold prevention. You still have to have planning and supervision on the site prep, foundation, and the installation of the prefab components. This is at the top of my list for a reason, I would build with this company. This is a house that mold-sensitive folks should consider due to their high-quality design, high-quality factory-built, and indoor factory conditions. ![]() The insulation used is Rockwool and cellulose in the model I saw (they have different wall systems to choose from). This would not work for those extremely sensitive to offgassing as their walls include OSB and engineered wood framing. They are wood framed with passive house design, made to high standards. Their smallest house “ Nano” is 477 sq ft. Their predesigned wing is called Unity Homes. They are custom homes so they can build any size. The owner chose the stone facade but that is not a typical facade. Their custom Thoreau Cabin home is 150 sq ft. Besonwood is a high-quality passive home custom prefab company. ![]()
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