I’ve been installing new tilt-in type replacement windows (Harvey “Majesty”), which call for 3 screws into each jamb (top-middle-bottom).
Here’s my question: How necessary are the “middle” screws?
Seems like every time I screw through the middle of the jambs, even when using shims behind them, the sash doesn’t go up and down as smoothly. Plus, I’m using low-expansion foam all around, which glues that sucker in there nice and tight anyway.
What do you guys think?
TP
Replies
Most replacement windows I have installed have a built in adjuster for the middle of the vinyl jambs.
Once the window is set in place you can extend or retract it to fit the jamb to the RO.
If yours doesn't have that, use the three screws like the manufacturer suggests.
Try overshimming slightly then tighten the screw, see if that yields a better result.
Woods favorite carpenter
while I am not familiar with your window manufacturer, we NEVER put a screw into the topjamb.
Do the windows have a sideflange? If they are windows that resemble a doorjamb, predrill the screwhole and make absolutely sure the window sits solidly plumb and level. You should not have any problem with the slider.
I just replaced 2 friday, 2 days ago and while they both had adjustable screws for the middle they didn't have any screw holes for the middlw and I think the top and bottom is fine with the use of the low expanding foam like I used and yes it will glue the windows in also for sure.
hopethat helps.
Carpentry and remodeling
Vic Vardamis
Bangor Me
I've never installed that exact brand. I know what you are saying about the function after middle screw placement.Sometimes the function gets sloppy or the single hung sash slides down a little when lifted. Foam is nice and all ,but do you want to trust it...alone? Does the manufacturer have pre-drilled holes or are you drilling them? What screws are you using?
Personally, I use screws with no thread right below the head, I've found that the window jambs tweak/warp if the threads are engaged. I use opposing shims AND foam to keep the jambs true, and provide the backer to keep everything nice and snug. Keep it all plumb/ level/ square . And not bowed /warped / twisted or tweaked ...and it's all good.
if the manufactoror wants three screws put them in. you will have a warrenty problem if you don't. I have never used harveys but heard ther were fine. adjust your shims and you should be able to make it work. like a previous poster, all windows i have installed have a built in shim in the middle that you adjust with a screw.