Hello!

New here!

Not sure if I'm in the right category but the moderator can move the post otherwise

We bought a house about 4 years ago.
Built in '76.
Sometime after '76, the previous owners built an extension (which they used as a hair salon).
They extended the garage by about 4 meters (flat roof).

We've now used the space as storage and haven't really "thought much" about the space.

This spring, I went up and checked the garage roof and noticed a sag on the roof above the extension.
I then checked inside and yes, sure enough, the interior ceiling is sagging.

This summer, I replaced the roof on the house and also took the opportunity to replace the paneling around the garage roof.
Meaning I could then see the roof trusses.

The trusses in the garage are "properly" built with pressed nail plates.
The trusses over the extension are designed in the same way, but with nailed-on boards instead of nail plates.
(See image) the two trusses on the right are the original garage. And the ones on the left are the extension. A bit hard to see maybe, but zoom in a bit...
My gut tells me the trusses over the extension are poorly constructed.

The ground around is a bit of a swamp (old lakebed).

1.5-2.5 meters to firm ground.

Unfortunately, I think they skimped on something when they dug out for the extension since the addition has settled.
The extension slopes by about 1cm/m.

Sure, it's possible to straighten the floor and walls, but not sure if it will keep sinking?

What do you say?
Could this be taken as a hidden defect, or is it my own fault for not noticing it at the purchase?

The sellers inspected the house at purchase but nothing about this is mentioned as far as I remember.

Thoughts and tips on solutions?

Have a nice weekend
 
  • Open garage roof structure with exposed beams and insulation, tools and materials on top, surrounded by greenery and neighboring houses.
  • Roof extension with exposed rafters showing insulation materials, blue tarpaulin, and construction tools; greenery and houses in the background.
  • Red house with a flat-roof extension, a ladder leaning against it, and construction tools on the ground. Cloudy sky in the background.
S
You only needed to get up on the roof to determine the sag, thus it was never a hidden defect.

consider IF you even need to do anything about it instead.
 
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SvanteC
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Sure, if there was a dip there then (which there should have been), you never know

It's not exactly fun to align the ceiling inside and then it collapses even more and in the worst case caves in eventually
 
S
Rooth07 Rooth07 said:
Sure, if it was a dip there then (which it should have been) you never know

It's not great fun to level the ceiling inside and then it collapses even more and in the worst case, finally caves in
Measure and make a mark or write down the measurement, measure again next year, then you'll see if anything changes.
 
Surely has something to do with the amount of snow and other factors ‍♂️
 
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