Reciprocal Roof at Home-Farm.org

Reciprocal roof on earthbag roundhouse made with free eastern red cedar trees
Reciprocal roof on earthbag roundhouse made with free eastern red cedar trees

“Reciprocal frame roofs are highly regarded in the natural building community though there is a limited amount of information about them on the internet. Resources that we’ve found helpful are listed at the bottom of this post. There is evidence of similar structures dating back to antiquated castles of Japan and Eskimo huts, though I have yet to find images of these.

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Low Tech Ferrocement Roof Building System

Low tech ferrocement roof in the Philippines
Low tech ferrocement roof in the Philippines

“Total roof size 360sqm approx
1 inch wire mesh 22 gauge
Days worked so far: 34 working days till last layer on last section laid.
Total cost so far $2800 not including patio post rebuild. Also waterproofing and painting not included but whole roof is covered.

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New Tile Roof on our Earthbag Roundhouse

Micro-concrete roofing tiles on our earthbag roundhouse
Micro-concrete roofing tiles on our earthbag roundhouse

After about three years of life on our vetiver thatch roof we recently replaced the thatch with micro-concrete roofing tiles (MCR). MCR tiles and metal roofing are fast and easy to install, and both work well for roofwater harvesting. I like MCR tiles because they’re more durable and look better than most metal roofing, and don’t get as noisy in rainstorms. We cut the tiles with a right angle grinder and then covered the joints with cement. This roof should last 25 years or more. Also note, the vents on top will provide even better ventilation. (They’re screened to keep birds out.)

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Further Information about Instant Shelters

Owen suggested that I elaborate on my suggestion for the use of magnesium cement in conjunction with basalt woven mats to create nearly instantaneous shelter. This idea stems from the work done by Michael Collins using magnesium cement (sometimes called “Ceramicrete”) in combination with other fibers, such as burlap or canvas. You can read a … Read more

Bermuda Roofs

Traditional Bermuda stone roofs have been the preferred roofing system in Bermuda (a hurricane region) for nearly 400 years.
Traditional Bermuda stone roofs have been the preferred roofing system in Bermuda (a hurricane region) for nearly 400 years.

“The archetypical Bermuda house is a low, squared building with a stepped, white roof and pastel-painted walls, both of which are made out of stone. The roofs are designed to catch water, of which there is no fresh supply in Bermuda apart from rain. The walls are designed to restrict damage from hurricanes and are required by law to be able to withstand windspeeds of over 100 mph (160 km/h).”

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