I had this problem in my big plains castle and what I eventually figured out was happening was that when I was outside my base but still nearby the game was partially unloading my base and causing bits of it to become unsupported.

The solution was install a wood-iron frame that anchored all the stone in two places. Like a single frame piece might look like this

S = Stone
W = Wood-iron
G = Ground

So no matter which way it's facing relative to me there's always one side anchored to the ground. I never had any problems after that.

Now I always think "How is this going to be supported if it's only half-loaded" and I haven't had any problems since either.

jonnin thank you think its the case ther are 2 blocks the 1x1 blocks the just go al the time and the are in a corner gonna use the reforcst columms thnks a lot

Nerevar thanks a lot have this game since the 1 day never play t it just waiting of sons of the forest like you

its not a proplem of suport stone ground than normal construcion about 3 higt and 1 in the midle its falling out put a lot of das later i was fhinist whit all

sorry for my inglish its rusty i speak german

Originally posted by Nerevar:

check thier color with the hammer. if they turn deep red they can sometimes break as they lack stability.

note : wait atleast 2 minutes after placeing something for the colors to adjust for new pieces. otherwise they all show green at first. thier color slowly switches afterwards.

It's a bug, most likely has something to do with building on a chunk border, green pieces just break in certain spots. Have had it a few times now. 2 wall sconces breaking constantly and my harbor, my docks all had 1 piece breaking in the same spot. Every time it was cause it was build on a chunk border. Sconces could not be fixed, harbor for some reason needed 1 piece of extra support, even though it didn't do anything structural integrity wise.

It can take time for the game to realize that a given stone piece doesn't actually have the support it needs. This can be seen through hammer repair view, as the color of the object shifts from blue to green to yellow and finally to red, and then breaking. Because this is happening so slowly, sometimes something will seem well-placed, only to later break when the game realizes that it isn't. With practice and patience, you'll get the hang of it.

Originally posted by John:

Originally posted by Nerevar:

check thier color with the hammer. if they turn deep red they can sometimes break as they lack stability.

note : wait atleast 2 minutes after placeing something for the colors to adjust for new pieces. otherwise they all show green at first. thier color slowly switches afterwards.

It's a bug, most likely has something to do with building on a chunk border, green pieces just break in certain spots. Have had it a few times now. 2 wall sconces breaking constantly and my harbor, my docks all had 1 piece breaking in the same spot. Every time it was cause it was build on a chunk border. Sconces could not be fixed, harbor for some reason needed 1 piece of extra support, even though it didn't do anything structural integrity wise.

have yet to have this occur on the marble fortress or the harbor on it. it all holds. and the roof is GIANT sized. and only has 4 pillars of marble holding it up in total yet. dvergr metal walls are AMAZEING in holding the chimneys up aswell and look fancy aswell allowing you to see the smoke go up and trough the roof.

i probaly wont finish the entire base before sons of the forest takes me away from valheim for the next half year but oh well.

maybe they have finally added a bigger boat then. which will probaly require me to redesign the harbor anyway...

I have had this. Its caused by stability: for some reason (yes, I know!) that one block is not getting the support it needs. You need to raise the ground below it or add iron supports inside it or the like to extent support so it stops breaking. And yes, Its weird at times... I had one 1x1 block that would not endure no matter what I tried (ended up making it a window since it was appropriate height) even though I had a full level of stone including ceiling above that block's height, something was off about that one computation of support.

If you can demostrate it, you may be able to highlight the bug (I do believe its a bad support calculation, round off or some edge case). But its hard to prove.

This is rare. I have only seen it twice, once above, and another later that I fixed with more supports. And I have built a LOT of stone.

check thier color with the hammer. if they turn deep red they can sometimes break as they lack stability.

note : wait atleast 2 minutes after placeing something for the colors to adjust for new pieces. otherwise they all show green at first. thier color slowly switches afterwards.

Originally posted by Nerevar:

check thier color with the hammer. if they turn deep red they can sometimes break as they lack stability.

note : wait atleast 2 minutes after placeing something for the colors to adjust for new pieces. otherwise they all show green at first. thier color slowly switches afterwards.

This ^^^^ There is quite an art to building in Valheim.. holding a hammer you can see the current state of your build piece by piece just look at the piece while holding hammer.. blue good, red bad and there are heights beyond which you need "iron wood" reinforcing.. normal building and buttressing does NOT help this "weight loading" represented by colour Dark red can hold no more above it.. maybe not even stay up..

Stone normally cant be hanging out without support.
If you do want to create a "window frame" out of stone and are struggling with the upper hanging part, you'll need to build the pieces quickly before the independent stone pieces are evaluated by the weight stability system.

There is a very rare bug where certain building pieces will repeatedly break for no known reason. I had a small wooden shack just outside a swamp where one specific wall would break if I left the area and returned. It had some kind of error when loading in apparently.

I could fix it and sleep in it all night, then go out and explore and it would be broken every time I returned. That one shack was the only building in all of my runs that did that. It wasn't stability and it wasn't from mobs attacking it.

That said, it's a very rare bug, so check the obvious things already mentioned first.

Are the stones that are falling out part of over hangs? Stones that are not supported underneath by soil, stone or timber will collapse. To build any overhangs with stone you need to use the stone arch piece