Lean-to rafter attachment

willowwood · Nov 3, 2022

Hello all and thanks in advance for your help.

Im looking to add a 15' lean-to extension off our existing garage roof line and Im stuck between two different solutions on how to attach the lean-to. The existent roof overhangs the support wall by approx. 1'.

We are in a 10/lb/ft snow load area.
We new roof will be shingled and will have a 3/12 slope.

I have attached a picture to show two different ideas I have of joining the lean-to to the roof. Please let me know what you think would work best, or if there is a solution I'm not mentioning. Any help is much appreciated!

Windwash · Nov 3, 2022

You ca

willowwood said:
Hello all and thanks in advance for your help.

Im looking to add a 15' lean-to extension off our existing garage roof line and Im stuck between two different solutions on how to attach the lean-to. The existent roof overhangs the support wall by approx. 1'.

We are in a 10/lb/ft snow load area.
We new roof will be shingled and will have a 3/12 slope.

I have attached a picture to show two different ideas I have of joining the lean-to to the roof. Please let me know what you think would work best, or if there is a solution I'm not mentioning. Any help is much appreciated! View attachment 536132

n just tack the new rafters to the ends of the old ones. The new rafter weight has to be above the walls. Best would be to cut existing rafter tails off at exterior wall line and set new rafters on wall next to existing. Add blocking in between on top of wall and reroof at least first couple rows of existing roof.

We Fix Houses · Nov 3, 2022

In your plan as said the new rafters need to sit on the top plate of the main structure.
Think about making it freestanding -- post's and headers near the garage as well as away from it.
You can install flashing material between the two roofs.

Joe Fairplay · Nov 3, 2022

ScipioAfricanus · Nov 3, 2022

Out of the two schemes you provided they both suck. You are not a General Contractor for sure nor are you a carpenter.
I suspect that you are not any kind of a contractor.

Andy.

wallmaxx · Nov 3, 2022

I thought we were supposed to send non-contractors over to our cousin Larry's DIY site....

THEN.....

If those here want to help show off their opinions.......we'd all end up over there and share every possible idea.

That Canuck Neal over there is a beast. He responds to almost ALL framing and carpentry posts.

www.diychatroom.com

greg24k · Nov 3, 2022

As Andy said, none of that will work or will ever get approved by anyone.

NYCB · Nov 3, 2022

For the lean to off my shop we simply ran the rafters adjacent to the existing trusses, picked our pitch, then used GRK fasteners to attach them to each other. Once everything was together I went back through and put what I'm going to call a band joist (I'm not a framer) or a cleat plate underneath everything to help distribute the load.

It's still there after several winters.

Tinstaafl · Nov 3, 2022

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Lean-to rafter attachment

willowwood

Windwash

We Fix Houses

Joe Fairplay

ScipioAfricanus

wallmaxx

greg24k

NYCB

Tinstaafl

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