Concrete house encapsulating process

Image from external-preview.redd.it and submitted by dartmaster666
image showing Concrete house encapsulating process

unionoftw on June 23rd, 2020 at 07:31 UTC »

Well it probably wouldn't be considered if there weren't some advantages. Maybe I can learn more

Flyincatz on June 23rd, 2020 at 07:55 UTC »

I know that concrete are strong, but is it really disaster proof as shown in the video?

sharkeyandgeorge on June 23rd, 2020 at 11:46 UTC »

As someone whos done hundreds of cast builds, power stations, windmills, houses, ware houses, factories, distilleries and more, this graphic is slightly misleading.

1 - foundations wrong, not a huge thing but if your going to cast walls you put in a kicker when you pour the found, that is a little rim around the edge for the shutter to fix on, if you do it the way shown with concrete as thin as suggested your going to let most of it leak out the bottom. You want to do it with a 125 or 150 slump and poker the shit out of it, if you do it the way shown its gonna cost you a fortune (pure cement is incredibly expensive) and youre gonna lose most of it to flooding out.

2 -Wrong ply, good luck getting that shit off afterwards no matter how much mould oil you use, regular ply soaks that shit up and sticks anyway, shuttering ply is very smooth and has a plastic coating, you get a few uses out of it and throw it away as soon as the surface starts to degrade, you do not want the ply to pull out chunks of the surface, especially with thin walls as shown, get too close to the steel and your building will not get passed.

3 - shit spacers, those spacers to hold the plywood apart look fucking terrible, if the plastics stiff enough to hold the shape youre gonna be cutting to deep into the wall and to close to the rebar, if its thin enough to avoid that its not gonna do shit.

4 - Bracing, theres almost no bracing shown and it really should be, the way its done your gonna need a fuckton of bracing, I dont think that whoever made the graphic understood the huge pressure involved in a concrete wall pour, or maybe they just thought it would make the graphic look too cluttered, either way its not a good representation.

4 - The roof, I guess you could do a roof this way?, but its about the stupidest way you could go about it. First pressure - theres a huge amount here and its going to blow out the bottom. Secondly its a huge waste of ply, you dont put a second skin and flood it, you leave it open and do a stiff slump and have a couple guys up there pokering and finishing. Thirdly its got rafters... why the fuck would you have rafters, if im doing a concrete roof its usually to get rid of the fucking rafters and replace them with a few columns that you hide in the walls, wood rafters aren't going to do shit, not strong enough to use for bracing and utterly unnecessary after its cured. Finish - its gonna be shit, even with good ply the finish will be piss poor you seriously need some good guys up top with at least a float, if not your going to get little ridges and dips that hold the water, and concrete is not water proof, you can and would seal it but that sealers will last far, far longer on a nicely finished surface.

6 - little things. Nobody's putting the room framing in first. The whole things gonna be lumpy and uneven. thats a fucking huge pour to do all the walls at once, never gonna happen. No expansion joints. No tie bars. Flat edge is gonna hold water and crap. No overhang, enjoy the damp.

Generally this is a bit shit, instead use this https://www.made-in-china.com/showroom/yanfeispacer/product-detailUBVxKXFbZzrf/China-Rebar-Spacer.html

and these https://www.rom.co.uk/products/accessories/permanent-formwork-column-formers-and-formwork-accessories/formwork-accessories/tie-bar-systems/formwork-threaded-tie-bar.html.

with these https://www.peri.ltd.uk/products/formwork/wall-formwork.html

and just tile the roof, you neither need nor particularly want a concrete roof, theyre a prick to make, theyre a prick to get looking good, and if they go wrong they go wrong huge, like tear down the building and start again huge.

PS, also the whole thing only works if your joinery is absolutely perfect, Ive hired hundreds of shuttering joiners, hell Ive been a shuttering joiner, our work isnt that good.