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I have to install a bunch of extension jambs for 2×6 walls.On my homemade ones I’ve counterbored and trim screwed them on or biscuted them.Any body got any good ways for these rabbeted ones. Glue and toe brads?….will minimal expanding foam hold them on?Theres always the tedious shimming against the ruff jamb and a nail thru.Any ideas? Ive only got 42 windows to do.
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Prescriptive codes don't address the connection at less common angles, so base the connection off more typical ones using bolts, structural screws, blocking, and steel tension ties.
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They should already be drilled to accept a fastener.
I suppose you could use a 16 casing nail, but I have used a 3 1/4" trim screw (made by GBK).
You have to bury it a bit, but holds well.
I got my screws from the local lumberyard, but you may be able to order on-line.
Terry
*GRK
*Piffin may be suggesting this, but if there's a an angled relief on the backside, you can run a screw through that and into the window frame. Drywall, finish screw, whatever will work. Not too long, but long enough to fasten well. I usually screw down through the head ext. into the side extension to lock that together. Contact Andersen, I'm sure they have a installation page on it that'll explain it better.
*Some of the andersen line come as calvin described. I have installed these with 1-1/2" pocket screws with a long driver bit if I'm doing it on the wall. Otherwise, a long screw through the face that will be covered by the casing is good.I like to order them preinstalled, or install them before the windows go in if I can.
*If there is'nt a relief cut like Calvin mentioned you can cut one with a router and 1/2' cutter. Predrill the holes and use a long phillips bit.
*Nail the exts. and stool together first.Then put the assembly up where you want it an shoot it in place with some 2" brads into the rough framing.Start at the corners using a flat bar to hold it where you want it.(miss the flat bart w/ the brads)Once you case it it wont be going any where!If your really ambitious you could apply the trim before you put it up.hope this helpsMr T (Trim)