Seven D Windows And Doors is a manufacturer based out of Hollidaysburg, Pennsylvania and has been in business since 1950. The company sells the 7700 new construction vinyl window series and the 7800 replacement vinyl window. Additionally, the company sells a vinyl patio door (no series name listed). By most accounts, 7 D windows and doors are budget geared products.
7 D windows sells their products through local window companies (distributors) throughout much of the state of Pennsylvania, and the surrounding states. Scroll down to read all of our 7D Windows reviews.
(Always Get 3 to 4 Local Price Quotes - And My Personal Advice)
Written by: Dane, Site Editor
Experience: 40+ years in window installation and replacement
Editorial Review: Replacement Windows Reviews Team
Original Publish Date - August 16, 2021 Page Last Update: March 12, 2026
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7D Windows Cost and Performance Summary
Average Window Installed Cost: $500 to $900
Average Patio Door Installed Cost: $1,600 to $2,400
Frame Material: Vinyl
Warranty: Up to 20 years
Overall Rating: 3.8 / 5 stars based on 4 reviews
Best For: Homeowners on a budget looking for a viable vinyl windows
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7D Windows and Doors Company Overview
Company: 7D Windows and Doors (Seven D Industries)
Parent Company: DeGol Organization
Founded: 1994
Headquarters: Hollidaysburg, Pennsylvania
Primary Products: Vinyl replacement windows, new construction windows, and patio doors
Frame Material: Vinyl
Average Installed Price: $500 – $900 per window
Warranty: Up to 20 years
Availability: Northeastern, Mid-Atlantic
Homeowner Query: Using 7D Windows for Farmhouse Replacements (2022)
Good afternoon- we have a farm that needs replacement windows and our contractor wants to use 7D Vinyl windows. What is your opinion. Thanks.
Janet - Homeowner - from 2022
[Website Editor Reply]
Janet, here is a link to a thread that discusses this window. [link pulled for duplicate content warning] It's a pretty frank discussion and the conclusion I draw personally is that I wouldn't risk having this brand of window in my home. No need to take a risk when there are 20 brands out there that MUCH more tried and tested. I'll send you my list of the best window brands to consider.
Dane - Website Editor - from 2022
Case Study: 7D Window Alignment and Quality Control (2018)
Using a grant program, I'm replacing my windows with double hung vinyl lowe windows. The window they've chosen is 7D, which I can't seem to get any information on.
I haven’t been offered any window manufacturer except the 7D, even though they aren’t mentioned in the contract I am somehow supposed to know their specs are the same or better than the contract Napco windows. I had the inspector and the wholesaler out to see the windows aren’t in line.
The wholesaler could not see anything wrong that the top sash and bottom sash grids were out of alignment. The installers are trying to align tomorrow and if they can’t get them straight can you recommend other manufactures in this price bracket with better quality control? I appreciate all of your help.
Debby - Homeowner - from 2018
[Website Editor Reply]
Debby, I know almost nothing about 7D, I'm not sure I've ever heard of them. I did a bit of research and found out that they're a wholesale manufacturer. I did find a thread that discusses them (use the link below).
I would find out whether you could use other manufacturers besides just 7D or at least explore the possibility. The idea of using a company that has such a low profile in the retail window market seems possibly problematic down the road.
Advice: If your installer cannot resolve the alignment issues, request a switch to a brand with more robust quality control in this price bracket. Using a brand with a low retail presence can lead to "problematic" maintenance or parts sourcing down the road.
Dane - Website Editor - from 2018
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Dane is the site editor of Replacement Windows Reviews and has worked in the window and door industry for more than 40 years. He spent nearly two decades as a professional window installer before transitioning into consumer education and window review analysis.
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