1″ foam under hardiplank-window details?
I want to install 1″ foam under my new hardi plank. The foam is the easy part. Anyone have any ideas on the window details? I will extend the window/door casings with 1 inch azek trim, and make copper drip caps. The window sills will be a pain to cut off and extend with a pvc historic sill. The previous owner/builder(sic) used 2×6 for the rakes and fascias. (don’t have any soffits) I’m installing 3/4 azek 1×6 over 3/4 plywood rips and rabbiting out the azek edge for the foam and siding to fit behind- a royal pain. Then there is the cornerboard details to futz with. I’m hoping this will all work out as the concept is sound but the devil is in the details. Any thoughts on the window sills. They are wood double hung with vinyl replacements (another “quality” feature from the previous owner)
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To be honest, I would just build out the window frame, and cover with aluminum, util I bought new windows!
One way might be to trim cut the edge of the sill and then biscuit joint a sill extension to it w/ e.g. gorilla glue. The concept is easy (they often are). The big question, is there room to run a fresh saw blade across the sill? Can you make a jig or some such to help get a clean/straight cut? I'm envisioning a circular saw w/ the narrow side to the window and run it at the sill slope angle across the sill. If the sill is too narrow to fit the saw and you do have an angle, raising the saw up off the sill will put it further from the window frame (so maybe your 'jig' is in part a way to raise the saw up a little.
I noticed few posts, so thought I'd try to get your creative problem solving skills going a bit, here. Thinking out loud ... food for thought. Maybe it will trigger an even better approach.
yea, thats the idea we were throwing around. We have a Crain flush cut circular saw to cut off the sill. after that we have to really make sure the glue joint is tight, i.e. waterproof!
Now that I think about it ... the glue joint may need clamping of sorts, so that may be another hurdle. Although maybe open the lower sash and simply clamp it to the inner edge of the sill?
that's a great idea- I was going to face screw them on and plug the holes. Some bessy clamps and a open window solves that one. See what happens when I dont look at the "open window of opp. Thanks..
Hey ... that's what BT is all about. Alternative, fresh perspectives to get you thinking when your mind has a tendency to think inside the box. Ain't it great? I love it.
Another thought I got from a recent FH issue ... put the sill extension under the existing sill as is shown on p. 38 of issue #205. It shows another sill as part of the trim that is sloped and sits against the 'base' of e.g. OSB sheathing and extends whatever 'sill' the window has. Maybe it wouldn't look right. Might try a scrap to see how it might work/look.
How about cutting the sill (width wise) leaving about 1/2" from the top down and adding the sill extension under that. That could solve the proplem of relying on only a glue joint to keep the water out and lighten up the clunky look of two sills on one window. Hmmmmmmmmm. Good thing it rained yesterday or I would have cut the sills off flush....
Sorry ... didn't follow that ... Not sure what you are saying.