Roof Joist Prop

[shovelhead]

Hello!

First post here, so I post this humbly. I moved into a new house a couple of years ago which has an original garage on the side of the house but has been extended up to accommodate a bedroom above the garage.

Originally there was a lean-to roof that would have been attached to the outside wall with joist supports. At some point, someone has extended upstairs and used the same roof joists which now tie into the main roof of the house.

The concern I have is that where previously each of the joists would have had their own joist support attached to the wall, now the end of each joist is simply nailed to the end of the main roof joists. As the joists from the extension aren't long enough to actually sit on top of the wall of the house themselves, the only thing taking the weight on the top side is the two nails on each joist tying them into the main roof joists.

My thoughts for a solution were to essentially fix a beam to the top of the wall butted up underneath the extension joists to help take some of the weight. Would this be recommended or is there another variation of a joist hanger I could use? My thoughts are it would be in a Y shape, or similar to a set of american football posts.

I've attached some pictures to help explain. Would appreciate any advise you could give, no matter how brutal

 

[noseall]

Hello!

Hi.


Do those lean-to rafters not bear onto the wall?

 

[shovelhead]

Hey,

No, they’re not long enough to rest on the wall. They would have originally sat in a joist hanger up against the wall (at a guess), but since they’ve been lifted up they’re now tied into the main roof joists, but without the support of any sort of joist hanger.

 

[Alastairreid]

The pics posted show the rafters sitting on a wallplate bearing on the wall.

 

[shovelhead]

Ah, the white board with two bits of baton attached? It's not load bearing, that's the old soffit. Have uploaded a few more pictures, hopefully for better context. I also put my hand on the wall to try and show how the joist doesn't reach up and over the top of the wall.

Appreciate you taking the time to reply, genuinely.

 

[shovelhead]

I have cut some of the soffit away to better show what I mean. As I'm really confident that can't be load bearing... As you can see, the top of the joist is not sitting on anything and appears to just be attached to the tail end of the main roof joists. Also, a further back photo for better perspective.

 

[noseall]

I have cut some of the soffit away to better show what I mean.

Fix a long (lateral) bearer to the ends of the upstairs joist ends to collect the lean-to rafter ends.

 

[shovelhead]

Thanks - underneath or across the top?

 

[noseall]

Thanks - underneath or across the top?

Either. Slotted in would look best.