[stevegee58]

I have a concrete block garage (24x24) that I added a 2nd story to for storage. I added a shed roof to it on the back with posts 10' away from the wall with a 2'overhang and 4/12 pitch with a shingle roof. I would like to add a similar feature to the side of the garage with post at 12' (for extra room) and wraparound and connect to back roof forming a hip. Because of height of existing shed roof on back of garage I can't go higher on new side roof, there is a 2' overhang here also. The pitch will be less on this new roof and the corner angle will be approximately 50degrees not the desired 45 degrees. I was going to roof all of this with metal roof. Is this doable and if so what should hip rafter be made of, 2 by's or lvl beam. I see many opinions on web on this topic. Please help with anything you see as red flags. Thanks in advance for your help. Steve G.

 

[Nealtw]

I have a concrete block garage (24x24) that I added a 2nd story to for storage. I added a shed roof to it on the back with posts 10' away from the wall with a 2'overhang and 4/12 pitch with a shingle roof. I would like to add a similar feature to the side of the garage with post at 12' (for extra room) and wraparound and connect to back roof forming a hip. Because of height of existing shed roof on back of garage I can't go higher on new side roof, there is a 2' overhang here also. The pitch will be less on this new roof and the corner angle will be approximately 50degrees not the desired 45 degrees. I was going to roof all of this with metal roof. Is this doable and if so what should hip rafter be made of, 2 by's or lvl beam. I see many opinions on web on this topic. Please help with anything you see as red flags. Thanks in advance for your help. Steve G.

Your new shed will be 12 x ?

 

[MTN REMODEL LLC]

Sorry.. I can't quite visualize your situation....

But, are you stick framing your roof.....or going with trusses....????

 

[Nealtw]

Sorry.. I can't quite visualize your situation....

But, are you stick framing your roof.....or going with trusses....????

I think he is looking at stick framing, I think it would be easier to do a gable roof. But like you I would be looking for trusses.

 

[stevegee58]

The garage is 24' long, so the new addition will be 24+12(from existing back section)= 36', will be stick framing, thanks for quick responses. Steve G.

 

[stevegee58]

I don't see how I would connect existing back shed roof to new roof and do a gable. This newly created area will be "L " shaped when connected .

 

[3onthetree]

The angle of the hip rafter (in plan) can be worked with. However, joining two roofs with different pitches at a corner, I think, would be impossible.

I assume the existing side overhang will be cut back to the wall. The size of a hip rafter needs to be deeper than the cut end of the rafters framing into it, and without an intermediate column will be sized as a beam for your roof loads and span.

Why can't you match the 10' depth on the back? Trying to get a 12' wide carport along the side?

 

[stevegee58]

I was going to go in under the garage roof and leave it alone. I hope? There is a kneewall sitting on top of concrete blocks that will be easy to sit the beam or lvl on.

 

[Nealtw]

The garage is 24' long, so the new addition will be 24+12(from existing back section)= 36', will be stick framing, thanks for quick responses. Steve G.

So yes what you suggest would work and that hip would be some kind of beam everything else with be 2x6, The step down from one pitch to the lower pitch give people trouble if it is not done right.

Getting enough bearing for the high end of the hip might be a trick too.

 

[stevegee58]

There is a kneewall sitting on top of the concrete blocks that will work well for hip rafter/beam.

 

[stevegee58]

Are 2x6's big enough here?

 

[3onthetree]

If you keep the new, metal roof shed below the existing gable overhang and do not meet up with matching the existing shingle shed roof at a hip corner (which has a different slope), then all is golden.

So in the attached photo the red and blue lines are the "ledger." The sketch is in plan, with the black existing garage overhang not shown, brown shed roof, and green hip addition.

 

[Nealtw]

Are 2x6's big enough here?

You might want 2x8 on the lower pitch. It depends on snow loads and all that an I am not an engineer. How much more do 2x8s cost?



I would also loom at trusses with a gable it would be 7 trusses and 6 valley set pieces

 

[3onthetree]

Neal, you see he is just adding a sucker to the side of the garage without messing with the existing roofs (although I think he initially wanted to tie into the back shed)?

 

[Nealtw]

Neal, you see he is just adding a sucker to the side of the garage without messing with the existing roofs (although I think he initially wanted to tie into the back shed)?

I Hated when a job is finished and people say" I wish I thought of that"
So I like people to consider all option. :wink2:

 

[stevegee58]

3 on the tree, you are correct with your drawing only I was wanting to just tie in to back roof. In your design you are opening up end of existing shed roof and I guess create new same pitch ledger board , correct? I then don't understand how to deal with (seal off)existing shed roof and new roof. I don't do a lot of this stuff (tool and diemaker) so bear with me.

 

[stevegee58]

Nealtw, I like your ideas on gable, it's just that I will always pull in from far end of garage (not seen) and this gable will be facing the woods.

 

[Nealtw]

3 on the tree, you are correct with your drawing only I was wanting to just tie in to back roof. In your design you are opening up end of existing shed roof and I guess create new same pitch ledger board , correct? I then don't understand how to deal with (seal off)existing shed roof and new roof. I don't do a lot of this stuff (tool and diemaker) so bear with me.

You would replace the siding and fascia over the new flashing on the new roof.
How high is the ceiling in the older shed?

 

[stevegee58]

8' under ceiling joists, at rafter support beam 7'4"

 

[Nealtw]

8' under ceiling joists, at rafter support beam 7'4"

Maybe if you lower the posts to 82" you could put the rafter just below that fascia and bring the rest of the shed roof lower across the back.

You could still have the ceiling to match the older one.