Q. about sealing aluminum windows

One word: Price.

By sealed do you mean thermally broken?

That'll stop air infiltration, and may keep you more comfortable, but it doesn't add to the R value of the windows unless you're going to trowel it on continuously. Is that what you're planning?

BTW, some of those holes are to let water that gets into the frame to get out, so you don't want to close those unless it never rains where you are.

"Michael Bulatovich" wrote in news: snipped-for-privacy@news5.newsguy.com:

Well, yeah. But what Imean is, there is not even an *option* to get better windows put in. We had gotten some super windows while living in th eToronto area, but the frames were all wooden (ours are mortered-in on the first floor, which is all brick), so replacement wasn't all that difficult. THey were bloody expensive but the house was downright *toasty* in the Winter, IOW, we saved bundles on the heating bills.

ANyway, they don't even have that option down here. Seems nuts to me. It took a lot fo searching to find a place that offered the Tyvek and TechShiled as options.

No, the frames themselves have little slits at the bottom. ALso, tehy're just screwed together. I just wanted to check whether they'd rot or something if I sealed them up.