Reinforce rafters

[Balata50]

Hi, hoping someone has ideas about this!
We have a log cabin from the mid-18th century that has had its original shingle roof covered with clay tiles. One exterior wall (long side) leans outward somewhat and the roof appears sunken in some places. The ceiling in the largest room (5X5 m) bows inward about 10 cm. The rafters are made of slender square pine. Carpenters I've spoken with think that reinforcing everything visible up in the attic is enough, but I'm afraid this just creates a rigid "triangle" that shifts the load to the unreinforced end pieces, creating a hinge where the old meets the new??
ANY THOUGHTS, PLEASE!

 

[ylven]

A thought. If the roof looks sagging, it may be because the walls have been pushed out, allowing the roof to sink. The solution then is to tighten the house together.

 

[Balata50]

A thought. If the roof looks sunken, it may be because the walls have been pushed out, allowing the roof to sink. The solution then is to brace the house together.

Exactly my thought, the question is whether I should leave the tiles in place and let the carpenters reinforce everything above the swell?

 

[ylven]

Based on your description, I can't quite visualize what deformations have occurred with the house. Are there proper rafters or roof beams with support posts? Are the walls bowing out on the long sides?
I myself have a problem with a barn where one wall bows out, causing the roof to sag inward. There simply isn't a sufficiently sturdy attachment of the joists to keep the barn together. In my case, I plan to arrange some sort of bracing of the building, probably with iron rods.

 

[Balata50]

Based on your description, I can't quite visualize what deformations have occurred in the house. Are they proper roof trusses or roof beams with support legs? Are the walls bowing out on the long sides?
I have problems with a barn where one wall is bowing out, causing the roof to sag. It's simply not a sturdy enough attachment of the flooring to hold the barn together. In my case, I plan to arrange some sort of bracing for the building, probably with steel rods.

Thanks for the input! I understand the idea of bracing the building but in my case, the eaves are only 145 cm above the room's floor. I'm just wondering about the risk of only reinforcing everything above the swell while leaving the tassarna as they are??

 

[ylven]

Thanks for the input! I understand the idea of pulling the building together, but in my case, the eaves are only 145 cm above the room's floor. I'm just wondering about the risk of only reinforcing everything above the wall but leaving the rafters as they are??

You have to consider the entire building. If the roof bends down, it will bulge out somewhere else.

 

[Balata50]

You have to consider the entire building. If the roof bends down, it will bulge out somewhere else.

Thank you ylven!!