Why won't we use these in the US.?

I would rather have snow on the ground than in my living room.

Those people are intentionally pushing the snow off the roof, the weight of which will otherwise cause the roof to collapse. It would double the roof cost to make it strong enough to carry the maximum possible weight without clearing.

when they inevitably fail you get catastrophic water damage

This is so dumb I don't even know where to begin? Do you really think that the snow blocking the outside of your house all came from the roof???

And then along comes a 90mph wind for 4hrs tearing the airplane wing like roof clear off, and suddenly everyone's mad & filing insurance claims...

There are variables in roof types that have been around for centuries. The V roof is not commonly used anywhere and it will never be anything more than a gimmick. Also, if the heat from inside your house is thawing snow on your roof, you have serious insullation problems.

Weight of the snow is my guess. Could work well down south. Especially if the home is set up to collect water.

They are not used in tornado areas for obvious reasons

Because they look stupid, and it puts a big freaking dent in the middle of your home. Mostly it looks stupid.

I wonder what the main reason is. Seems like there could be some practical hurdles beyond just the technology.

You need better waterproofing/maintenance, stronger trusses to hold snow, stronger protection from strong wind/storm prone areas, and most importantly, you are reducing the height on the house in the center, which mostly likely has living room, dining, etc vs bed/bath on side.

That roof is already stressed at its lowest point by design, and where is the snow supposed to go? It's not sliding off - it's piling up, until the structure COLLAPSES.

We use these in the U.S., just not for cookie cutter houses.

Because it's retarded

Wind is why. Look up what a Midwest Windstorm can do to a roof. Now look at how that inverted roof can get 2 -8 times the lift of a normal roof.

You lose tons of space. No thank you.

First straight line wind over 60mph and the roof becomes a glider.

Up north we use to pack snow against the side of the house to create more insulation and reduce the chance of pipes freezing.

They leak

Hell no.

Weight of snow, Ice dams, and hell even rain water looks like it'll just sit there.

That is a nightmare when you have a roof leak. I would choose never to have them. I'm familiar with them and it's not a good idea.

Spoken like a man who doesn't live in an area where it gets to -40 degrees. And then snows 5 feet in two hours.

Having a pipe with icy water in your "warm wall" will very effectively turn your warm wall into an ice cold wall.

cranes moving the whole damn bridge section like that is wild to watch. we build everything in pieces over here and it takes a year longer.

when you forget failure, you get failure again...

Butterfly roofs can be problematic in other ways. The expense of this system alone is a deterrent. Not to mention there are very few regions throughout the US that would actually benefit. This is a fabulous design though. I really like it.

I like my snow on the floor

STUPID

That pipe in middle of house would be PERMANENTLY covered with moisture, and make fungus grow around all the time.

Because the weight of the snow will collapse the roof

Bury the pipes inside on a normal roof...

And for people who live in Florida?

Even if this wasn’t the dumbest idea ever… who would choose to pay to heat snow all winter long, than just letting slide off the side? lol. Dumb

"Melt the snow" is easy to say, but would be an insane energy cost added.