I am currently in the planning stages of my garage and I have a question about the garage door jamb. I am planning a 24" concrete stem wall above the finished floor elevation. I had originally planned on making the opening in the concrete 9'-3" to allow for a pressure treated 2x6 on eash side. Now I am considering using a composite trim board that is 3/4" thick. My question is if I should allow an extra 1-1/2" to put the composite over the 2x6 or just use the composite alone and attach that to the concrete stem wall. Thanks in advance.
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Overhead garage door jamb
- Thread starter nfk
- Start date
pattenp
Well-known member
I think fastening the 2X6 to the concrete and then fastening the trim board to the 2x6 would be better. That way you can use smaller stainless finishing nails on the trim board and something like Tapcon screws to fasten the 2X6 to the concrete.
Zeke
Well-known member
Who is supplying the door? If the door is 108" in stock form, you might want to give them the room they need. However, most roll up doors will work behind extra trim, so to me it's either.
On the 2 x 6 PT rough opening: you can nail that off all the way down to the top of the concrete and let it float the rest of the way with some construction adhesive between it and the stem wall. Get good lumber for this, not something that will kick out after a year of seasons. Use Tapcons or some kind of concrete fasteners if you must. But you will have full length backing for that trim board.
Additional thought: insert a metal tie at the junction of the stem wall to floor that you can wrap up on the PT 2 x 6.
On the 2 x 6 PT rough opening: you can nail that off all the way down to the top of the concrete and let it float the rest of the way with some construction adhesive between it and the stem wall. Get good lumber for this, not something that will kick out after a year of seasons. Use Tapcons or some kind of concrete fasteners if you must. But you will have full length backing for that trim board.
Additional thought: insert a metal tie at the junction of the stem wall to floor that you can wrap up on the PT 2 x 6.
I think fastening the 2X6 to the concrete and then fastening the trim board to the 2x6 would be better. That way you can use smaller stainless finishing nails on the trim board and something like Tapcon screws to fasten the 2X6 to the concrete.
This is the direction I am leaning. I think I will make the opening in my stem wall 9'-4 1/2" to allow for the pt 2x6 and the 3/4" composite on each side and be exactly 9' between them.
ForceFed70
Well-known member
Keep your opening at 9'3" Having the opening slightly smaller is not a problem and makes weather sealing a little easier (but your door opening is a little smaller).