Window Replacement & Installation
Energy-efficient windows that stop drafts, not just look new.
Windows Done Right for New England Weather
Old, single-pane or worn double-hung windows are one of the biggest sources of heat loss in New England homes. FortExteriors Systems installs energy-efficient vinyl, fiberglass, and wood-clad replacement windows with full frame or insert installation, properly flashed and insulated so there are no air gaps left behind trim.
Materials & Systems We Install
- Vinyl double-hung and casement windows
- Fiberglass window systems
- Wood-clad windows for historic-district homes
- Low-E, argon-filled insulated glass
- Full-frame and insert (pocket) installation
- Energy Star-rated glass packages
What Sets Our Windows Work Apart
Full-frame or insert installation
We recommend the right method for your existing frames, not a one-size-fits-all approach.
Low-E, argon-filled glass
Energy Star-rated glass packages sized for Massachusetts heating and cooling seasons.
Historic-district-friendly profiles
Simulated divided lite and true divided lite options for homes in historic districts like parts of Newton and Wellesley.
Proper flashing & insulation
Every window is flashed, foam-insulated, and sealed — the leading cause of window failure is bad installation, not bad glass.
How a Windows Project Works
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In-home measurement & consultation
We measure every opening and discuss frame material, grid patterns, and glass packages.
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Custom order
Windows are manufactured to the exact opening size — no shimmed, ill-fitting units.
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Removal & installation
Old windows are removed, frames are inspected for rot, and new units are set, shimmed, insulated, and flashed.
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Interior & exterior finishing
Trim, caulking, and touch-up paint complete the job inside and out.
What MetroWest Homeowners Say About Our Windows Work
“Great experience from start to finish. Professional, efficient, and the new windows look fantastic. The installation was clean and on time, and you can already feel the difference in comfort and energy efficiency. Highly recommend for anyone needing window installation done right.”
Hi Robert, truly appreciate you taking the time to share this, it means a lot to us! Love hearing that you’re already feeling the difference. Enjoy the new windows, and don’t hesitate to reach out if you ever need anything! Thank you!
Windows Services by Town
We provide window replacement and installation throughout MetroWest Massachusetts, including:
Built on Real Credentials, Not Just Promises
Licensed & Insured
MA HIC Reg. #219097 | MA CSL #CS-122723, registered under M.G.L. c. 142A.
Direct Project Management
Every project is managed directly by FortExteriors Systems with vetted local installation crews, clear scheduling, and a final walkthrough.
5-Year Labor Warranty
Every installation is backed by our own workmanship warranty, separate from manufacturer material warranties.
$1M / $2M Liability Insurance
General liability coverage of $1,000,000 per occurrence / $2,000,000 aggregate.
Free Estimate Within 24 Hours
Submit a request and hear back from a real estimator within one business day.
10+ Years Serving MA
Over a decade of exterior remodeling work across Central Massachusetts.
Get Your Free Windows Estimate
Local, licensed, and insured — serving all of MetroWest Massachusetts.
Windows Questions, Answered
Will new windows lower my heating bill?
Most homeowners see a noticeable drop in drafts and heating/cooling costs, especially when replacing original single-pane or early double-pane windows.
Insert or full-frame replacement — what’s the difference?
Insert replacement keeps your existing exterior trim and is faster; full-frame replacement removes everything down to the studs and is recommended when frames are rotted or you’re changing window size.
Can you match historic window profiles?
Yes — we install true and simulated divided lite windows that meet the look required in historic districts, including parts of Newton and Wellesley.
How long does window installation take?
A typical whole-house window replacement (10-15 windows) takes 1-2 days once the custom units arrive.