Roof repairs from inside?

[rogmor]

Morning all.
Have a roof with a few timbers needing replacing due to historic woodworm (this will get treated too). The actual slates outside are 100% fine, and no signs sagging or distortion outside. Won't need insulation as this is being done separately to joists below. So my question to experienced roofers is: can this timber replacement work be done from the inside, without having to remove all the slates, so I can avoid all the weather problems of external work?

 

[freddiemercurystwin]

Which timbers require replacing? Know your terminology ....

 

[noseall]

Morning all.
Have a roof with a few timbers needing replacing due to historic woodworm (this will get treated too). The actual slates outside are 100% fine, and no signs sagging or distortion outside. Won't need insulation as this is being done separately to joists below. So my question to experienced roofers is: can this timber replacement work be done from the inside, without having to remove all the slates, so I can avoid all the weather problems of external work?

I'll wager that 'truss' arrangement should have a horizontal tie and it was removed. I hate to think how much it is pushing on the walls....

 

[rogmor]

Good diagram, Freddiemercurys twin, but as u know in reality older places can be a dogs dinner version, as is the one in question. Not even sure if the vertical timbers are doing anything - maybe someone planned to line out a room and they were simply there to take the plasterboard. one of the purlins is looking rotten at the end going into the wall. But just wondering if this work could be done from the inside?

 

[StephenStephen]

So which timbers are you planning to replace?
Have you considered repair or sistering?

 

[freddiemercurystwin]

 

[StephenStephen]

Good diagram, Freddiemercurys twin, but as u know in reality older places can be a dogs dinner version, as is the one in question. Not even sure if the vertical timbers are doing anything - maybe someone planned to line out a room and they were simply there to take the plasterboard. one of the purlins is looking rotten at the end going into the wall. But just wondering if this work could be done from the inside?

So maybe if you look at the diagram, and identify which ingredients of the dogs dinner you want to replace, then it might be possible to tell you if you can feed it from the inside...

 

[^woody^]

it's common for roof timbers to be supplemented not substituted, as long as any other connected timbers are still secure. This can normally be done from the inside.

 

[catlad]

Which timbers require replacing? Know your terminology ....

Think you need to add a few names for the dictionary for that roof! looks like they built the roof out of whatever was left over from building the main structure 200 yrs ago?

 

[catlad]

I'll wager that 'truss' arrangement should have a horizontal tie and it was removed.

I was thinking the same.

 

[rogmor]

All fair points and your comments much appreciated. The place is 250 miles away and there's a limit to what I can diagnose from these lousy photos I took. I need to make that trip again soon. But at least you didn't laugh me out of the forum at the idea that certain roof timber repairs are done from the inside, although very dependent on which timbers and what's needed.
Many thanks.

 

[Alec_t]

Although adding roof timbers might be doable from inside, removing any defective ones could be problematic because of the things attached to them.