Installing windows at altitude

Old 01-31-10, 06:49 AM
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Unhappy Installing windows at altitude

We just installed 20 Milguard windows at 6500 feet elevation. The windows had breather tubes. We saw nothing on the sides of the windows and there was nothing in the install intructions. We did not "seal the breather tube" Were we supposed to do something, if so what and what is the impact now? Do we have to rip all the windows out and start again?
Old 01-31-10, 09:16 AM
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Well, here is one mfg's comments related to breather tubes.

I'll let you draw your own conclusions.

There are several window pros on this forum, so give them time and I'm sure they will comment.

Old 01-31-10, 10:50 AM
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As mentioned in Bud's link, there are 2 types of tubes. Breather tubes must ALWAYS be crimped. Capillary tubes are much smaller and are typically left open- probably more often because it's not convenient to crimp them.

Once the units have reached their destination, breather tubes should be crimped with a pliers, folded over, and crimped again. Then tucked back into the gap surrounding the glass. Failure to do so will eventually lead to moisture between the glass once the desiccant has been spent. As for capillary tubes, I personally believe crimping them as well would be in the best interest of the unit, if it's possible/feasable.

I wouldn't think that it would be necessary to remove a window to crimp the breather tube. Since the tube comes out of the glass seal, you would only need to remove the sash glazing to find the breather tube. But if you have capillary tubes, you might be fine leaving them alone if that is what the manufacturer suggests. When in doubt, contact them and go with what they recommend.

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