shannon belisle
Absolutely incredible service and remarkable work! Would ?? recommend and would hire again! I am absolutely IN LOVE with my new doors!
Taking CallsWindow Installers in Thunder Bay, Ontario
Strasser & Lang
Strasser & Lang
Strasser & Lang is an exterior contractor serving the Thunder Bay area and Northwestern Ontario. It installs windows and doors for homes and commercial buildings.
Last Updated October 9, 2026.
Business Highlights
- All employees hold Ontario Working At Heights certification.
- It has received IKO’s Craftsman Premier designation.
- New-construction and asphalt-shingle re-roofs carry a five-year workmanship guarantee.
Service Area
Thunder Bay area and Northwestern Ontario.
Local Business Taking Calls
Strasser & Lang is one of 10 window installers ProsGrade lists in Thunder Bay, Ontario.
Taking Calls
Taking calls through ProsGrade
Listing details
5 services listed, including Windows, Doors and Roofing. Open weekdays, closed on weekends. Rated 4.8 from 80 reviews.
- Verified listing details
- Service information
- Customer review signals
- Photo gallery
- Public contact information
- Published local profile
How This Business Compares
How Strasser & Lang compares with the other 9 window installers on ProsGrade in Thunder Bay, using public Google ratings and review counts.
- Ranks in the top half of the 10 Thunder Bay window installers on ProsGrade by Google rating and review volume.
- Rated 4.8 on Google, well above the 4.5 average of other Thunder Bay window installers on ProsGrade.
- Has more Google reviews (80) than 7 of the 9 other Thunder Bay window installers on ProsGrade.
- One of 4 Thunder Bay window installers on ProsGrade rated 4.7 or higher from at least 10 reviews.
Services Covered
5 services- WindowsWindow solutions for Northwestern Ontario’s seasonal extremes
- DoorsEntry and storm doors; choices across design and function
- RoofingInstallation for sloped roofs
- Soffit, fascia and eavestroughRepairs and replacements for residential and commercial properties
- SidingVinyl, wood, aluminum, steel and fibre cement
Reviews
What customers say
Customers praise professional, courteous crews and careful cleanup. For a window job, one customer says the workers arrived at the scheduled time, used drop cloths and cleaned up; another appreciated patient answers and clear updates about crew timing.
Customer Reviews
Ken McLellan
All roofing on our house replaced - old stuff removed was 20 years old, deteriorated and with one small leak. Strasser & Lang did a great job including six new attic vents. Work looked to me fully professional, final result looks great. Courteous crew, very good worksite cleanup. Invoice was exactly as estimated. A competitor's estimate was at higher price and similar timing.
Note to readers: ALL roofing contractors get booked up quickly each spring, so get your arrangements made as soon as possible. We booked on July 31 and were told very likely into September. They came on Sept 23, so they met their timing estimate.
Update: We also contracted with Strasser & Lang to replace Soffit & Fascia with Aluminum materials, done on a later date by a different crew. They did that about Nov 10 (that's about what they had told is for timing). Smooth professional job looks great. Now I'll never have to climb and paint that stuff - I could not do it myself anyway! Again, invoice was as they had estimated.
Nowell Sleep
Strasser & Lang replaced my Condo living room and 2 bedroom windows. The staff were really professional, personable and very helpful. The workers showed up at the time scheduled and they used drop cloths so as not to make any mess. They did a great job and cleaned up after. They removed and replaced my living room curtains and bedroom blind. I would highly recommend them. The office staff were also very good to deal with.
Laura Lee Jewell
It has been a great experience working with this company. I was unsure what was needed and required more than one estimate. Justin was patient and answered my questions. Kara in the office was super helpful and I am thankful for her input choosing shingles etc. The new roof, soffit, fascia, eavestroughs and downspouts look great. Both work crews were respectful, polite and truly engaged in their work. The communication around timelines for crew arrivals was spot on. I highly recommend.
Pamela MacDonald
Very professional and respectful young men who worked well together. They kept me informed with the conditions and pictures as they completed the roof. The property was well cleaned as the job was completed. Very pleased and would definitely recommend
JT and his team.
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Frequently Asked Questions
How does Strasser & Lang handle a project from planning through completion?
It starts with a building visit to inspect the project, then prepares a detailed proposal. The team begins installation and inspects the work when it is complete.
Can Strasser & Lang’s windows help reduce heating and cooling costs?
The company says quality windows paired with proper installation reduce heating and cooling costs.
How does Strasser & Lang handle door installation and cleanup?
The company says its team is trained to install quickly and efficiently to limit disruption and security risk, and that it leaves the space as it found it.