Thermo-Tech Windows and Doors
Thermo-Tech Windows and Doors is a privately-held Sauk Rapids, Minnesota manufacturer of premium vinyl windows and patio doors, sold through regional lumber yard and building material dealers to residential and light commercial customers across the Upper Midwest.
- Company typePrivate
- Founded1953
- HeadquartersSauk Rapids, United States
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Thermo-Tech Windows and Doors does
Thermo-Tech Windows and Doors LLC is a privately-held manufacturer of vinyl windows and sliding patio doors, headquartered in Sauk Rapids, Minnesota. The company operates a single manufacturing facility producing premium PVC fenestration products for residential and light commercial construction across the Upper Midwest. The Thermo-Tech brand was established in 1993, building on the heritage of East Side Glass founded in 1953.
The company's core products are vinyl windows and sliding patio doors engineered with proprietary multi-chambered PVC frame extrusion designs, fusion-welded corner construction, and Duralite warm-edge glass spacer systems. These technical components target cold-climate thermal performance, validated through ENERGY STAR certification. The portfolio includes the Energy Guard super high-performance window line, positioned as a premium tier. Thermal performance claims and federal-project eligibility are supported by independent ENERGY STAR and Build America, Buy America (BABA) certifications.
Thermo-Tech generates revenue through hardware sales of windows and patio doors, sold exclusively via a two-step dealer distribution model — primarily lumber yards and building material dealers — across Minnesota and four bordering states (Wisconsin, North Dakota, South Dakota, and Iowa). End customers include individual homeowners, residential builders and contractors, and commercial/multi-family developers. The BABA certification enables access to federally funded commercial project channels that non-certified regional competitors cannot bid on, broadening the addressable market beyond traditional residential dealer-pull demand.
Thermo-Tech Windows and Doors firmographics
Firmographics- Name
- Thermo-Tech Windows and Doors
- Legal name
- Thermo-Tech Windows and Doors LLC
- Website
- https://ttwindows.com
- Company type
- Private
- Founded year
- 1953
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Thermo-Tech Windows and Doors is a privately-held Sauk Rapids, Minnesota manufacturer of premium vinyl windows and patio doors, sold through regional lumber yard and building material dealers to residential and light commercial customers across the Upper Midwest.
- Ownership category
- akta.pro rank
Thermo-Tech Windows and Doors industry classification
Industry- Product category
- Vinyl Windows and Patio Doors Manufacturing
- NAICS
- Metal Window and Door Manufacturing (332321)
- SIC
- Metal Doors, Sash, Frames, Moldings & Trim (3442)
- akta.pro primary industry
- Windows (IMADAIAC)
- akta.pro secondary industry
- Exterior Doors (IMADAIAA)
Keywords
Where Thermo-Tech Windows and Doors is headquartered
LocationHeadquarters
- HQ city
- Sauk Rapids
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Thermo-Tech Windows and Doors business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Infrastructure, Marketing or Sales
Revenue model
- Vinyl Window Sales: Thermo-Tech manufactures premium vinyl windows sold through a dealer network for both new construction and replacement projects. Windows are available in standard sizes (Classic Series) or custom sizes (Thermo-Fit series).
- Patio Door Sales: Slim Line Style Sliding Patio Doors sold through dealers in standard or custom sizes. Features fusion-welded frames and high-performance insulated glass.
- Architectural Shapes and Specialty Windows: Custom architectural window shapes including half-rounds, quarter-rounds, triangles, and other geometric configurations for distinctive building designs.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Multi-year contract | Classic Series - Standard Sized New Construction Windows |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
Thermo-Tech Windows and Doors product offering
Product offeringCore offering
Thermo-Tech Windows and Doors manufactures vinyl windows and patio doors from its Sauk Rapids, Minnesota facility. Its product line spans multiple vinyl window series and styles (including double-hung, casement, awning, sliding, bay/bow, and specialty shapes) along with complementary patio doors, offered with customization in size, glass package, and color/finish. The company sells primarily through authorized dealers, builders, and contractors serving residential replacement and new-construction markets in Minnesota and adjacent states.
Product overview
Thermo-Tech Premium Windows and Doors is a vinyl window and door manufacturer offering three distinct window product lines (Thermo-Fit for custom replacement, Classic Series for new construction, and Energy Guard for super high-performance applications) plus Slim Line Style Sliding Patio Doors. The company provides a wide array of standard and custom-sized products for residential applications, including various window styles such as casement, double-hung, single-hung, slider, awning, bow/bay, picture, and architectural shapes. Their products feature multiple glass options including double and triple-pane insulated glass with various LoĒ coatings and argon gas fills. The company operates from central Minnesota and serves customers through a dealer network across the upper Midwest.
Differentiator
Problem solved
Functional benefit
Products and services
- Vinyl Windows
Quantifiable outcome
- Energy Guard PLUS Triple Insulated Glass achieves U-values as low as 0.17 and R-values up to 6.67 for select window styles
- +2 more outcomes
Companies that use Thermo-Tech Windows and Doors
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles1 record
Thermo-Tech Windows and Doors technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Thermo-Tech Windows and Doors partnerships and signals
Strategic signalScale indicators2 records
Recent moves6 records
Expansion highlights3 records
Thermo-Tech Windows and Doors competitors and assessment
Company assessmentDirect peers
- Marvin Windows and Doors: Warroad, Minnesota-based premium window and door manufacturer serving residential and commercial markets. Both are Upper Midwest manufacturers with deep regional roots and premium pricing, competing for the same builder and dealer relationships.
- Weather Shield Windows & Doors: Wisconsin-based premium window and door manufacturer with dealer distribution in the Upper Midwest. Direct competitor in the same regional market with comparable product breadth including custom and high-performance offerings.
- Simonton Windows: Vinyl window and door manufacturer (part of Cornerstone Building Brands) with strong dealer and home center distribution. Competes directly with Thermo-Tech in standard and custom vinyl replacement windows.
- Cascade Windows: Regional vinyl window manufacturer serving the Pacific Northwest and Western US with builder and dealer channels. Comparable in scale and product mix to Thermo-Tech, offering a benchmark for regional vinyl window economics.
- Sunrise Windows and Doors: Mid-sized vinyl window manufacturer with regional manufacturing and dealer distribution. Comparable in scale, product mix, and channel approach to Thermo-Tech, making it a close benchmark for cost structure and market share.
Broad incumbents
- Andersen Windows & Doors: Largest US window and door manufacturer with national distribution and broad product portfolio across wood, vinyl, fiberglass, and composite. Competes with Thermo-Tech in residential channels through its Andersen, Renewal by Andersen, and Silver Line brands.
- JELD-WEN: Global manufacturer of windows, doors, and building products with extensive brand portfolio. Competes with Thermo-Tech through multiple vinyl and composite window lines sold through dealer and home center channels.
- Ply Gem Windows: Large volume vinyl window manufacturer serving builders and dealers across North America. Competes primarily on price and scale, pressing Thermo-Tech's premium positioning in the new construction channel.
- Pella Corporation: Major national window and door manufacturer with extensive dealer network and showrooms across the country. Offers vinyl, wood, and fiberglass lines competing with Thermo-Tech's premium vinyl positioning in builder and replacement markets.
- Milgard Windows & Doors: Established vinyl and fiberglass window manufacturer (part of MI Windows) with strong regional presence. Competes with Thermo-Tech in the premium vinyl segment through dealer distribution and builder relationships.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Thermo-Tech Windows and Doors social profiles
Digital presenceThermo-Tech Windows and Doors compliance and trust
Trust signalCompliance5 records
Thermo-Tech Windows and Doors financial estimates
Financial estimateRevenue estimate
Valuation estimate
Thermo-Tech Windows and Doors leadership team
Management profileNumber of profiles
Thermo-Tech Windows and Doors funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Thermo-Tech Windows and Doors M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Thermo-Tech Windows and Doors
What does Thermo-Tech Windows and Doors do?
Thermo-Tech Windows and Doors manufactures vinyl windows and patio doors from its Sauk Rapids, Minnesota facility. Its product line spans multiple vinyl window series and styles (including double-hung, casement, awning, sliding, bay/bow, and specialty shapes) along with complementary patio doors, offered with customization in size, glass package, and color/finish. The company sells primarily through authorized dealers, builders, and contractors serving residential replacement and new-construction markets in Minnesota and adjacent states.
Is Thermo-Tech Windows and Doors a public or private company?
Thermo-Tech Windows and Doors is a private company. It is classified as unknown and is currently operating.
When was Thermo-Tech Windows and Doors founded?
Thermo-Tech Windows and Doors was founded in 1953. It employs 101 to 250 people.
Where is Thermo-Tech Windows and Doors based?
Thermo-Tech Windows and Doors is headquartered in Sauk Rapids, United States, in the North America region.
How does Thermo-Tech Windows and Doors make money?
Three revenue lines are on record. Vinyl Window Sales are the primary driver. The others are patio Door Sales and architectural Shapes and Specialty Windows.
Who are Thermo-Tech Windows and Doors's main competitors?
Direct peers on record are Marvin Windows and Doors, Weather Shield Windows & Doors, Simonton Windows, Cascade Windows and Sunrise Windows and Doors. Broad incumbents are Andersen Windows & Doors, JELD-WEN, Ply Gem Windows, Pella Corporation and Milgard Windows & Doors.
Does Thermo-Tech Windows and Doors have an API?
No public API is recorded for Thermo-Tech Windows and Doors.
What industry is Thermo-Tech Windows and Doors in?
Thermo-Tech Windows and Doors's product category is Vinyl Windows and Patio Doors Manufacturing. Its primary akta.pro industry code is IMADAIAC, Windows, with a secondary code of IMADAIAA, Exterior Doors. Its NAICS code is 332321 and its SIC code is 3442.