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Installing windows and doors locally since 1986
GTS Windows & Doors is a Kitchener window and door company that has been measuring, installing and repairing windows and doors across Waterloo Region since 1986. We work from 47 Bridge Street East in the Bridgeport area, and window installation is our lead service. Entry doors, patio doors, glass replacement and commercial openings round out the work.
Our customers are homeowners replacing drafty originals, property managers looking after rental and condo buildings, general contractors and builders who need openings finished on schedule, and business owners updating storefronts and entrances. Residential and commercial jobs follow the same approach: an on-site measure, a written quote and an installation that is flashed, insulated and sealed to the wall, not just caulked at the trim. Four decades of opening up local walls has taught us what hides behind old frames and how to deal with it properly.
We serve Kitchener, Waterloo, Cambridge and Guelph, the townships of Woolwich, Wellesley, Wilmot and Puslinch, and communities such as Elora, Rockwood and Acton. GTS is licensed, insured and WSIB covered, we install ENERGY STAR rated products, and every window and door we put in is backed by a 20-year parts and labour warranty. Our office is open seven days a week, with evening hours Monday to Saturday for customers who work during the day.
Most of our residential work is swapping tired windows for new ENERGY STAR rated units through a planned window replacement. When the opening is new, enlarged or needs framing repair, our window installation service covers the rough opening, flashing, insulation and interior finishing.
Styles include casement, awning, double hung, slider, picture, bay and bow windows. Frames come in vinyl, fibreglass, aluminum and wood, and glass ranges from double pane Low-E with argon up to triple pane.
Before you sign, we explain whether a retrofit or full-frame install suits each opening. The right method depends on the condition of the existing frame and whether you want to keep your interior trim.
Low-E coatings, argon fill, warm-edge spacers and triple glazing cut heat loss and room-side condensation through a Waterloo Region winter. The ENERGY STAR products we install can also count toward Ontario's Home Renovation Savings rebate when bundled with other upgrades.
Compare glass packages, frames and styles across our full range of new windows.
Not every opening is a standard rectangle. We install made-to-measure arches, trapezoids and circles, laminated acoustic glass for homes near busy roads or rail lines, and stained or decorative glass for entries, stairwells and bathrooms.
A new front door changes how a house looks, locks and holds heat. We install insulated steel entry doors for security and value, fibreglass doors that resist denting and can carry a realistic wood grain, and solid wood doors for heritage and custom homes.
At the back of the house, we replace sticking sliding patio doors and install hinged French doors that open a kitchen or family room onto the deck. Screen doors finish the opening for summer, and you can see every style and material on our exterior doors page.
Not every problem needs a new unit. Our window repair service fixes the issues that show up as windows and doors reach middle age.
Property managers, general contractors and business owners call us for aluminum storefronts, glass entrance doors, commercial steel doors and frames, and window replacement in offices and multi-unit buildings. We plan the work around tenants and business hours so the building keeps running.
Our crews carry WSIB coverage and liability insurance, which most commercial sites require before anyone starts. Read how we handle scope, scheduling and site safety on our commercial windows and doors page.
GTS has installed windows and doors in Waterloo Region since 1986. We have seen how local houses age, from postwar bungalows to newer subdivisions, and we plan each install around what we find.
Many warranties cover the product but leave the labour to you. Ours covers both parts and labour for 20 years, under the written terms you receive with your installation.
GTS is licensed and insured, and our installers are covered by WSIB. Ask for a current WSIB clearance certificate with your quote.
We install ENERGY STAR rated windows and doors. GTS is also a member of SAWDAC, the Siding and Window Dealers Association of Canada, whose members commit to a code of ethics covering truthful advertising and clear contracts.
Price depends on size, style, material and how much work the opening needs. These are typical installed ranges in Waterloo Region for 2026, including removal, disposal and interior finishing.
| Product | Typical installed price |
|---|---|
| Standard vinyl casement or slider window | $700 to $1,500 per window |
| Triple pane vinyl or fibreglass window | $950 to $2,000 per window |
| Bay or bow window | $4,500 to $10,000 |
| Steel or fibreglass entry door | $2,500 to $6,500 |
| Sliding patio door | $2,800 to $6,000 |
| Replacement sealed glass unit | $250 to $700 per unit |
Ontario's Home Renovation Savings program offers $100 per rough opening for ENERGY STAR certified windows and doors, as part of a bundle of upgrades that starts with a home energy assessment. Eligibility depends on your home and heating fuel, so confirm it before you order.
In Kitchener, replacing a window or door within its existing opening, with no structural change, generally does not need a building permit. Adding a new opening or widening an existing one does.
Properties in Kitchener's heritage conservation districts, Victoria Park, Civic Centre, St. Mary's and Upper Doon, or designated individually, may need a heritage permit before windows or doors change. We flag this at the measure so it is sorted before anything is ordered.
These are the jobs we quote most often. Ask us about comparable work when we visit for your on-site measure.
Original builder-grade windows in a bungalow or two-storey swapped for triple pane or Low-E double pane units, room by room.
A worn door and rotted sill replaced with a pre-hung steel or fibreglass unit, often with new sidelights.
A heavy, drafty slider replaced with a new sliding door or a pair of French doors onto the deck.
Aluminum entrance doors for plaza tenants and steel doors and frames for service corridors and industrial units.
GTS holds a 4.5-star rating from 31 Google reviews. Reviewers often mention patio door and entry door replacements, and installers who are friendly and leave the house tidy.
Here are three recent 5-star reviews about window and door installations, in the customers' own words.
“The new windows and patio door are excellent quality”
“The windows look incredible! …they were knowledgeable, kind and professional.”
“So impressed with their finish work when installing doors and windows.”
Our Bridgeport base puts all of Waterloo Region, Guelph and southern Wellington County within easy reach. We travel anywhere within about a 45-minute drive of Kitchener, so ask even if your town is not listed below.
47 Bridge Street East, Kitchener, ON N2K 1J7, in the Bridgeport area near the Grand River.
We serve Kitchener, Waterloo, Cambridge, Guelph, Woolwich, Elora, Puslinch, Acton, Rockwood, Wellesley, Wilmot and anywhere within about 45 minutes.
A standard vinyl replacement window typically costs $700 to $1,500 installed, and triple pane or fibreglass units cost more. Size, style, custom shapes, retrofit versus full-frame installation and any rot repair are the main cost drivers. We confirm the exact price after an on-site measure.
Yes. We replace one opening at a time, so each room is only open to the cold for a short stretch, and we use sealants and foams rated for cold-weather application. Many homeowners book winter installs because that is when drafts are most noticeable.
Yes. We install windows and doors in new construction, additions and renovations for builders and general contractors, and we handle ongoing replacement and repair work for property managers. Storefronts, entrances and commercial steel doors are part of that work as well.
Our warranty covers both parts and labour on the windows and doors we install for 20 years. If a covered component fails, the replacement part and the work to fit it are included. Your written warranty sets out the full terms and exclusions.
A standard replacement window usually takes one to two hours to remove, install and finish. A typical house of 10 to 15 windows takes one to three days on site. Custom products are generally ordered 4 to 8 weeks ahead of the install date.
Call 226-806-0597 or send a quote request to book your on-site measure. We are open Monday to Saturday 7am to 9pm and Sunday 9am to 5pm.
Call or text226-806-0597