Window & Door Installation in St. Thomas, Ontario
Homes we work on in St. Thomas
St. Thomas has a mix of older heritage homes and newer subdivisions. We install in both.
Heritage homes (1880s–1920s)
Courthouse District, Rosebery Place, Gladstone Street, Wellington Street
Older brick and frame homes around the Courthouse District. Most have mid-century or 1980s replacement windows now reaching end-of-life. Sash-pack replacement preserves the brick course where possible; brick-to-brick when the casing has gone.
Newer south-end subdivisions (2000s–present)
Miller's Pond, Eagle Ridge, Shaw Valley, Harvest Run, Orchard Park South
Modern Energy Star–spec single-family builds. Original windows are usually still in factory warranty. Selective upgrades, glass-pack swaps, and storm-damage replacements are the typical asks.
North-end and corridor to London
Lynhurst Heights, Talbotville Meadows
Newer subdivisions north of the city, mostly post-2015 builds. We cover this corridor as part of our regular service area.
Neighbourhoods we serve in St. Thomas
From the heritage Courthouse District south to the newer subdivisions, and north to the corridor heading into London.
Heritage core
- Courthouse District
- Rosebery Place
- Gladstone Street
- Wellington Street
- Downtown core
Newer subdivisions (south & east)
- Orchard Park South
- Harvest Run
- Miller's Pond
- Shaw Valley
- Eagle Ridge
North end / corridor to London
- Lynhurst Heights
- Lynhurst
- Talbotville Meadows
What we install for St. Thomas homeowners
Replacement Windows
Vinyl, fibreglass, and aluminum frames. Heritage-appropriate grille and muntin profiles for the older homes around the Courthouse District; modern frames sized for the newer subdivisions. Low-E coatings, argon fill, foam-filled frames standard.
Exterior Doors
Entry doors (fibreglass and steel) and patio doors (sliding and swing). Multipoint locks, standard hardware tiers, colour-wrap finish options for matching new windows to existing trim.
Siding, Soffit & Fascia
Vinyl, polymer, fibre cement (Hardie), and engineered wood (LP) siding. Aluminum trim and coil work. Often combined with a windows or doors project for a coordinated exterior refresh.
Why work with us in St. Thomas
St. Thomas is in our regular service area
No half-day mobilization charge tacked onto your quote. We measure on-site, quote in writing, and schedule install around your project — same as we would for any in-area job.
Local supplier, local install
Northstar's vinyl manufacturing plant is right here in St. Thomas. The windows you install go from the local factory floor to your house — short lead times and easy warranty service if needed.
One point of contact
Marko is on every site, from the first measure to the final cleanup. No call centre, no franchise upsell, one accountable point of contact from start to finish.
Fully insured + WSIB
Liability insurance and WSIB documentation provided on request before any work starts.
How It Works
A straightforward process from first call to finished project.
Request a Quote
Tell us about your project. We'll be in touch shortly to set up an on-site visit.
On-Site Consultation
We visit your home, take measurements, discuss options, and provide a detailed written quote.
Professional Installation
Our crew handles the work — clean, efficient, and finished to a standard we stand behind.
Final Walkthrough
We walk through the completed work with you, answer any questions, and make sure you're satisfied.
Manufacturers we install
Multi-manufacturer dealer — the right product for the house and the budget, not whatever has the best dealer rebate.
Common questions from St. Thomas homeowners
Window or door project in St. Thomas?
Free no-obligation site visit. Written quote, fully insured, one point of contact.
Tell me about your St. Thomas project
I'll come measure in person, talk through what makes sense for your house, and follow up with a detailed written quote.