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Old 08-30-2012, 09:37 PM   #16
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Window replacement 60's home


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Originally Posted by HomeSealed
Reviews are very subjective, so what you are looking for is a "composite" score so to speak. If the overwhelming majority of reviews about a given product are positive, then that speaks volumes. If it is very mixed or tilts toward negative, that is rather telling as well. I would weigh the overall sentiment along with the objective performance ratings in your decision making process.
Pella's higher line wood windows (Architect/Designer) are decent as wood windows go, although not without their issues (rolled formed exterior cladding). The 350 series vinyl is a big step forward for them in terms of quality, however the pocket sill (as opposed to fully welded, sloped) is a highly undesirable design, and a deal breaker on that line in my personal opinion. Above all that, their reputation for customer service is well deserved in my experience. That is not a positive commentary.
For some additional window-specific commentary, this site has great info, and there are additional "window forum" resources as well to help round-out your perspective. A simple google search would turn that up.
Please explain the pocket sill is and what problem it causes?

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Old 08-31-2012, 09:52 AM   #17
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In a pocket sill, the lower sash goes into a capture/pocket when closed.

As a result, any moisture that gets into the window must be drained out via weep holes. These weep holes can be sources of problems down the road and can result in leak generation if they become blocked or freeze/thaw cycles crack the structure.

The benefit is s supposedly a higher DP rating and lower air infiltration. The reality is that all the best DP and air infiltration numbers are coming out of sloped sill windows now so there is zero reason to still use a pocket sill window.
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Old 08-31-2012, 04:47 PM   #18
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Window replacement 60's home


+1. The problem with draining that water through chambers in the frame is that they are inaccessible and cannot be cleaned out when they get plugged up. As WoW mentioned the pocket sill had been used to improve the structural performance of vinyl windows. Now that the newer designs are much higher quality, they are achieving the same ratings or better with sloped sills, just like you would see on a wood window. The pocket sill is really an obsolete and antiquated design imo. I am a very big advocate of the structural performance ratings as an indicator or build quality and strength, but a pocket sill gives a somewhat "false" sense of strength comparatively.
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Old 08-31-2012, 09:29 PM   #19
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Thanks everyone.

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