New Openings vs. Replacement: Not the Same Job
Replacement works within an existing opening. A new opening requires cutting through siding or brick, sheathing and framing, installing a properly sized header to carry the load above and adding jack studs and a sill. On new construction, windows go in before siding, which allows full integration with the house wrap. If you are replacing existing windows instead, see our window replacement in Oxford page.
Flashing and Water Management in the Right Order
Water runs downhill, so every layer around a window has to overlap the one below it like shingles. That typically means a sloped sill or sill pan first, then the window with its nailing fin, then side flashing, then head flashing tucked under the house wrap above. Getting this sequence wrong is one of the most common causes of hidden wall rot, and it is something we never rush.
Choosing Windows for a New Build or Addition
Match the existing house where the addition meets it, including frame color, grid style and sill height. Think about the sun: low-E glass with low solar heat gain is worth it on west-facing walls. Egress size rules apply to bedrooms. Many Oxford homeowners choose value-oriented vinyl lines such as the Pella 250 Series for additions, while others match higher-end wood or fiberglass already on the house.
How to Prep for Installation
- Confirm rough opening sizes with your builder before windows are ordered.
- Make sure house wrap is installed and intact on new framing.
- For new openings in finished rooms, clear furniture and wall decor near the work area.
- Plan for some dust and noise while openings are cut.
Our Oxford window and door installation page covers the rest of our services.
Common Questions
How long does new window installation take?
On new construction, several windows can often be set in a day. Cutting new openings in existing walls takes longer because of framing, flashing and finish work.
What types of windows do you install?
We install double-hung, casement, sliding, picture, awning and specialty windows from brands including Pella, in vinyl, fiberglass and wood options.
Are your new windows energy-efficient?
We offer insulated, low-E glass packages, many with ENERGY STAR certification for our climate. We help you choose the right glass for each wall.
What affects the cost of new window installation?
Window size, material and glass package, whether we are cutting a new opening, the wall type and the finish work inside and out. We provide a free itemized estimate.