Vaulted cabin living room with reclaimed timber beams, a globe pendant and tall windows onto the woods

Window installation · Sumner County & Greater NashvilleWindow Installation replacement windows and new openings

Replacement windows, new openings cut into existing walls and tall walls of glass in new construction, flashed into the weather barrier, insulated around the frame and finished with trim that suits the house.

Schedule a Consultation or call (615) 674-8642

BBB Accredited A+ rating · zero complaints
Licensed & Insured TN Contractor License #79477
25+ Years in the Trades Led by owner Jonathon Wilkinson
5.0 Client Rating 16 verified reviews on HomeAdvisor
Locally Owned Cottontown · Sumner County, TN

Fireclay farmhouse sink with a brushed gold faucet and glazed tile backsplash under a wall of windows

Walk-in shower in large-format tile with a glass-block window, ceiling rain head and matte black body sprays

Glass is the easy part

A window is a hole in the wall until it is flashed properly

Window brands and glass packages get most of the attention, but a well-made window installed badly will still leak, draft and rot the framing around it. The weak points never change: the sill, where water collects; the head, where rain running down the wall meets the top of the frame; and the gap between the frame and the rough opening. A good installation manages all three, and none of that work is visible once the trim goes back on.

For replacement windows, JACCO removes the old unit and inspects the opening for rot, damaged sheathing or missing flashing. The sill gets a sloped, flashed base, the jambs and head are flashed and lapped so water always runs outward, and the gap around the frame is sealed with low-expansion foam rather than stuffed with loose insulation. Outside, the trim is integrated with the siding or brick; inside, new casing and stools finish the opening.

New openings bring more possibilities. Cutting a window into an existing wall needs a properly sized header and, in some cases, a permit. In new construction, a vaulted cabin living room can open onto the woods through tall windows, and a farmhouse sink can sit beneath a wall of glass, as in one JACCO cabin project. Smaller details count too, like a glass-block window that lights a tiled shower without giving up privacy. Many window projects pair with door replacement and fresh exterior paint.

Window scope

Window work JACCO installs

One drafty window or every opening in the house: each unit is listed in the bid with the flashing, insulation and trim it needs.

Replacement windows in existing openings
New window openings with headers
Tall windows and walls of glass
Bay, picture and specialty windows
Glass block and privacy windows in baths
Sill pans, flashing and weather barrier repair
Rot repair around old window frames
Interior casing, stools and aprons
Exterior trim tied into siding or brick

Why JACCO

How JACCO keeps water out of window openings

Every opening inspected

When an old window comes out, we look for soft sheathing, rotted framing and missing flashing. Damage is repaired before the new window goes in rather than hidden behind fresh trim.

Flashing lapped like shingles

Sill, jambs and head are flashed in sequence so each layer overlaps the one below it. Any water that gets behind the siding is directed back outside instead of into the wall cavity.

Sealed, insulated and adjusted

The gap around the frame is filled with low-expansion foam and sealed, and every sash is checked to open, close and lock smoothly before the interior trim is installed.

“Sliding glass door install. Water tank and plumbing repair. Great response to my first phone call. Easy to work with.”

In their words Sharon H. Sliding door install and plumbing repair Published on JACCO’s earlier website · 2022

How a JACCO project runs

Bid, schedule, build, punch list, close.

See the full process

Stage 1Bid
Site visit, measurements and a written bid tied to a clear scope of work.
Stages 2 and 3Schedule · Build
Selections settled, materials lined up, a detailed schedule, and a protected, clean home while we build.
Stages 4 and 5Punch list · Close
We walk the finished work with you and close the project when every item on the list is done.

Should we replace all our windows at once?

Not necessarily. Replacing every window together keeps styles and colors consistent and is usually more efficient, but the decision depends on condition and budget. Failed seals, rot and windows that will not open are the priority; others can follow later if the new units match. We look at each window during the site visit and help you decide which ones need attention now.

What is the difference between insert and full-frame replacement?

An insert window fits inside the existing frame, leaving the old trim and jambs in place. It is less invasive but slightly reduces the glass area, and it relies on the old frame being sound. A full-frame replacement removes everything down to the rough opening, so the sill, flashing and framing can be inspected and corrected. When rot or leaks are suspected, full-frame is usually the right call.

Do window replacements need a permit?

Requirements vary. A like-for-like replacement may not need one, while enlarging an opening, adding a window or changing a header usually does. In Franklin, homes in a historic district may need design review for exterior changes, and some Brentwood neighborhoods have HOA architectural review. JACCO confirms what your project requires during the bid and handles any application.

Can you add a window where there isn’t one?

Often, yes. A new opening needs a header sized for the load above it, and the wall has to be checked for wiring, plumbing and ductwork before anyone cuts into it. Outside, the siding or brick around the opening has to be patched and the window flashed into the weather barrier. We assess the wall during the site visit and confirm whether the change needs a permit or an engineer’s input.