3D printed house the first to receive certificate of occupancy in the United States

[gorobei]

while drywall is probably considered a necessary evil (you need some sort of non-flammable/ large area covering material/ that can shed moisture buildup) that builders tolerate because building code requires something to do the job, the 2 guys in the video agree that it is the least ideal material.

[installation is horrible, repair is as onerous, water damage from flooding/rain ruins it requiring full replacement in a renovation, you need drywall anchors to mount anything not near a stud.]

the point of concrete walls is you never need to worry about finding a stud because a masonry anchor can go in anywhere, water damage from flood isnt applicable, and printing eliminates the installation hassle. (i would argue you still want most of the concrete to be sealed since water penetration will affect the rebar.)

 

[JEDI]

the point of concrete walls is you never need to worry about finding a stud because a masonry anchor can go in anywhere, water damage from flood isnt applicable, and printing eliminates the installation hassle. (i would argue you still want most of the concrete to be sealed since water penetration will affect the rebar.)

theres rebar in cement houses?

 

[WilliamM2]

theres rebar in cement houses?

There is rebar in the basement foundation walls for my house, and the poured basement and garage floors.

 

[IronWing]

Why would you drywall a crawlspace?

If you make things nice for the monster that lives under the house, maybe it won't come upstairs.



Red, throw a bag of Doritos in there every once in awhile, keep it happy.

 

[sdifox]

theres rebar in cement houses?

I am not even sure it is possible to build any thing with concrete without rebar. ok the 3d printed stuff, but they'll fail apart really easily.

 

[sdifox]

while drywall is probably considered a necessary evil (you need some sort of non-flammable/ large area covering material/ that can shed moisture buildup) that builders tolerate because building code requires something to do the job, the 2 guys in the video agree that it is the least ideal material.

[installation is horrible, repair is as onerous, water damage from flooding/rain ruins it requiring full replacement in a renovation, you need drywall anchors to mount anything not near a stud.]

the point of concrete walls is you never need to worry about finding a stud because a masonry anchor can go in anywhere, water damage from flood isnt applicable, and printing eliminates the installation hassle. (i would argue you still want most of the concrete to be sealed since water penetration will affect the rebar.)

the paper on drywall is very much flammable.

 

[gorobei]

the paper on drywall is very much flammable.

not really. the paper is usually treated with fire retardant chemicals while the gypsum underneath is a calcium sulfate hydrate mineral. when heated the hydrate separates out into water which turns to steam and takes heat away. regular drywall is rated for 30 min of resistance, there are higher rated types.

it can stand up to blowtorches. (spoiler the flame in the preview is a ps effect)

this guy left it for over 20 minutes.

the problem with regular drywall is mold growing after the paper on the drywall gets wet. green board and purple board have better water resistance with purple being rated for bathrooms and laundry rooms.

assuming you can live with bare 3d printed concrete walls, you can skip the time and cost of the drywaller.

 

[Red Squirrel]

Drywall actually has a certain fire rating to slow down a fire, it's not super great but it's there. Though in close proximity to fire (ex: wood stove) they call for cement board.