Vinyl replacement windows.

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Forum topic by mike02130 posted 11-20-2017 07:37 PM 628 views 0 times favorited 5 replies Add to Favorites Watch
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170 posts in 1784 days

11-20-2017 07:37 PM

Quick question. I had some vinyl windows installed in my house. I’m having issue with the installation. The windows replaced bad windows which replaced the original double sash windows with weights.

The height of the rough opening is 3/4” taller than the window, thus leaving a 3/4” gap at the head. They tried to remedy this gap by sandwiching two pieces of vinyl L material together. Like a z channel placed vertically. However, because the Gap is so wide, there is a gap of light and air coming in.

I’m in the process of talking with the installer. I would like to be armed with information when I speak to him. Ok

So, with no further ado, the quick question is, how much less should the window measure in height than the measurement of the rough opening?

Thank you.

-- Google first, search forums second, ask questions later.

5 replies so far

View Gilley23's profile


489 posts in 1494 days

#1 posted 11-20-2017 07:53 PM

It would help if you posted pictures of the inside and outside of the house. What kind of siding do you have?

View corelz125's profile


2988 posts in 2088 days

#2 posted 11-21-2017 02:19 AM

3/4” is a bit of a stretch but there should be a sort of vinyl channel cap. Between that cap and the window they should have put some type of insulation either the pink stuff or spray stop gap. Is there a window stop on the top? Also are they going to cap them on the outside with aluminum?

View mike02130's profile


170 posts in 1784 days

#3 posted 11-21-2017 02:24 AM

Thanks guys. It’s been fixed. Window guy messed up on ordering. Too short. Installer tried pulling a fast one and tried to cover his bosses ass. They’ll get fixed. Thanks again.

-- Google first, search forums second, ask questions later.

View Dark_Lightning's profile


4606 posts in 4221 days

#4 posted 11-21-2017 04:33 AM

Good to see. Air gaps are completely unacceptable in a window installation.

-- Steven.......Random Orbital Nailer

View JenniferMichaels's profile


6 posts in 1300 days

#5 posted 11-23-2017 04:50 AM

Good to know that your problem is resolved. Most of the times the window designs are good and the problem is with the installation of the window. Some of these details have to be seen while installing like, air gaps and proper insulation.

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