We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. It is: In the case of a porch - or even a roof that you want to make before doing the walls (for example, if you want to start catching rain water to use for the rest of construction) - you will need to make posts for the structure to rest on. or polystyrene cement.

Just use to heavy built stuff with thinnest part at the wall tops of 2 feet wide. Pour concrete in the base, to just above dirt level. Is the finish coat material more or less the same as the scratch coat? Perhaps the most difficult challenge for sloped roofs is the engineering and design work. Your comments? Make sure the post is plumb/level. I haven't seen any how-to on this type of construction before.

Finish. Also, have you worked out a cost per sq. It’s a good choice for a small roof that you won’t need to get on, and that you want to be curved (arch or dome).

I'm assuming you are using something like this as the bonding acrylic.https://www.homedepot.com/p/SikaLatex-1-Gal-Concrete-Bonding-Adhesive-and-Acrylic-Fortifier-187782/202521398I'm only doing about 80 square feet using your techinque. If it stinks of ammonia, you’ve got the good stuff, but most acrylic additives for concrete will work. (For more information, see Total Shell, Total Protection on page 28 of this issue.). Sheet rock is attached to the integral furring strips. Cloyd “Joe” Warnes, a concrete expert and consulting engineer, has more than 40 years of experience with pitched concrete roofs. The mix wants to be pretty liquid for this first coat, so that it penetrates (but doesn’t fall through) the fabric.Brown Coat The subsequent layer consists of a 1:1 acrylic and water, and then add 1:1 cement and finely screened sand. Reply Depending on the frame’s material, you can use screws with washers, staples or tie it on with zip-ties or wire.

Just Curious if the addition of Chicken Wire, Aluminum or other type Window Screen material after the first coating, would be useful to add strength to a roof like this?

Goes Quick -  almost equals the speed of putting up metal roofing, which is a material we often avoid as it does not last as long, or look or sound (in rain) as nice as concrete options.

Warnes notes that pitched roofs can be built using a number of other technologies—such as steel joists and plywood—but only foam decking includes the insulation, sound attenuation, and other features most owners will want.

"Latex Concrete Habitat" by Knott and Nez, Write in Braille With B.E.E! You can pour (or throw) it on and then spread it out using a paint or broom-like brush. If anyone has a cheaper alternative, I'd love to hear it.

Artistic - it allows for many different designs, though a pyramid structure seems to be the most efficient.

And coupled with a foam forming system, such as Lite-Deck, concrete can create a high-performance roofing system that “completes the energy envelope.” Just like ICF walls, the combination of foam and concrete in the roof protects interior spaces from outside temperature fluctuations.

It has so many benefits, especially as a roof (or unique art project).

what about using air-crete/foam-concrete with this roof design?

How many gallons of this acrylic am I going to need for three coats?

Something we have started doing, which we would highly recommend, is putting a vinyl tarp on top of the frame, and then the fabric. The mix we used for the first layer was a 1:1 of water and acrylic, and then mix in your portland cement. Today, modern concrete technology allows average homeowners the opportunity to strengthen their roofs with stone, yet without abandoning traditional roofing styles. on Introduction. Would the shade cloth as used on hi-rise construction sites work as the mesh you are referring to, or what type of mesh do you reccomend?

Great job with this Instructable! In fact, it will continue to get harder over weeks.

To mix the concrete, we used a five gallon bucket and a drill with a paint stirrer on it.

How much portland per gallon (or 5 gal) of liquid? ft.Completion Date: August 2007Owner: Alan HoffmanBuilder: Ross RainesRoof Installer: Ateg EngineeringProject Engineer: Ateg EngineeringExterior Walls: Buildblock ICFRoof: Lite-DeckExterior Finish: Fossilcrete, Your email address will not be published. “They’ve been doing it since the 1960s on concrete-lined canals and stormwater drainage channels,” he says.

Could you use this same technique to build a wall?

On the Hoffman home, King spec’ed a steel I-beam at the ridge line, with the Lite-Deck running perpendicular to the ridge.

Pat Boeshart, inventor of the Lite-Deck system, points out that placing concrete on a sloped surface is not new. Some people use burlap and are very happy with it.