Thermal Windows
Thermal Windows, Inc. is a Tulsa, Oklahoma-based custom manufacturer of energy-efficient aluminum and vinyl windows and doors serving Oklahoma homeowners through company showrooms and nationwide commercial builders, developers, architects, and military clients via a national sales-representative network, in business since 1979.
- Company typePrivate
- Founded1979
- HeadquartersTulsa, United States
- Headcount101–250
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What Thermal Windows does
Thermal Windows, Inc. is a privately held custom manufacturer of aluminum and vinyl windows and sliding glass doors, founded in 1979 by Bob G. Pool and headquartered in Tulsa, Oklahoma. The company operates a single Tulsa manufacturing facility that produces made-to-order units rather than mass-produced stock, with polymer thermal barriers separating interior and exterior frame surfaces, Low-E glass coatings, argon-gas insulated glazing, and proprietary options including TS28 Triple Silver coated glass, ThermalSafe laminated PVB glass, and U-Series polyamide thermal struts in commercial units. Products span residential lines (Single Hung 500, Double Hung 700, Horizontal Rolling 525/725, Casement/Awning 900/925, Picture 550/750, TrustGard Vinyl 6600/6800, Sliding Glass Door 9900) and commercial lines organized by window type and AAMA performance grade, including impact/ATFP-rated variants for hurricane and military construction. The company also serves as an authorized dealer/installer for Therma-Tru entry doors and Larson storm doors.
The firm runs a dual go-to-market motion. Residentially, it sells directly to Oklahoma homeowners through two showrooms (Tulsa, Bethany/OKC), inside-sales phone lines, free in-home estimates, and company-employed installation crews that typically complete projects in one to two days. Commercially, it sells nationwide to builders, developers, architects, and general contractors through a dedicated commercial sales team and an external sales-representative network, supported by CAD specifications, AIA continuing-education credits, NFRC energy-performance ratings, LEED credit eligibility, and AAMA-rated product certifications. Pricing is quote-based across every project, with residential estimate ranges disclosed as $5,000-$50,000+. Revenue is generated through one-time product sales plus installation labor on the residential side and hardware/spec-driven sales on the commercial side, with verticals including multi-family, student housing, hospitality, education, government, and military construction. Reported projects range from single-family retrofits in Tulsa to multi-state developments such as Aspen Heights in Austin, 240 Ionia in Grand Rapids, and Fort Leonard Wood military housing.
The operating footprint includes a Tulsa headquarters and manufacturing plant, an Oklahoma City-area showroom in Bethany, and a Dallas sales office, with commercial support extending across the Midwest, Mid-Atlantic, South Central, and Texas regions. AAMA, NFRC, BBB, AIA, USGBC LEED, and EPA Lead-Safe certifications underpin regulatory standing. The company is family-founded, with no disclosed institutional ownership or M&A activity; it explicitly markets Oklahoma ownership and over four decades of continuous operations as a trust signal.
Thermal Windows firmographics
Firmographics- Name
- Thermal Windows
- Legal name
- Thermal Windows, Inc.
- Website
- https://thermalwindows.com
- Company type
- Private
- Founded year
- 1979
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Thermal Windows, Inc. is a Tulsa, Oklahoma-based custom manufacturer of energy-efficient aluminum and vinyl windows and doors serving Oklahoma homeowners through company showrooms and nationwide commercial builders, developers, architects, and military clients via a national sales-representative network, in business since 1979.
- Ownership category
- akta.pro rank
Thermal Windows industry classification
Industry- Product category
- Windows and Doors Manufacturing
- NAICS
- Metal Window and Door Manufacturing (332321)
- SIC
- Metal Doors, Sash, Frames, Moldings & Trim (3442), Glass Products, Made Of Purchased Glass (3231)
- akta.pro primary industry
- Windows (IMADAIAC)
- akta.pro secondary industries
- Low‑E, Solar Control & Energy-Efficient Coated Glass (IMADAHAF), Tempered & Heat-Strengthened Safety Glass (IMADAHAD)
Keywords
Where Thermal Windows is headquartered
LocationHeadquarters
- HQ city
- Tulsa
- HQ country
- United States
- HQ region
- North America
Offices3 records
Markets served
Thermal Windows business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Window and Door Manufacturing & Sales: Custom manufacturing of aluminum and vinyl windows and sliding glass doors. Products sold as one-time purchases with various series and customization options. No mass production - all windows manufactured to exact customer specifications.
- Residential Installation Services: Full-service residential window and door installation. Lifetime Limited Warranty applies only to products installed by Thermal Windows. Professional installation crews complete typical residential projects in 1-2 days.
- Commercial Project Support: Architectural consultation, product delivery, and post-installation guidance for commercial builders, developers, and design professionals nationwide. CAD specifications and technical documentation provided.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Custom quote-based pricing |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels5 records
Thermal Windows product offering
Product offeringCore offering
Thermal Windows is a custom manufacturer of energy-efficient aluminum and vinyl windows and sliding glass doors, producing made-to-order products in its Tulsa, Oklahoma facility since 1979. The company serves residential homeowners through company-owned showrooms and installation crews, and supports commercial builders, developers, and architects nationwide through a dedicated sales rep network. Proprietary Thermal Barrier polymer technology, TS28 Triple Silver Glass, ThermalSafe laminated glass, Low-E coatings, and argon gas fills form the core technical differentiators across its window and door product lines.
Product overview
Thermal Windows is a manufacturer of energy-efficient aluminum and vinyl windows and doors for residential and commercial applications, operating from Tulsa, Oklahoma since 1979. The product portfolio spans two main segments: Residential products include Single Hung Series 500, Double Hung Series 700, Horizontal Sliding Windows Series 525/725, Casement & Awning Windows Series 900/925, Picture Windows Series 550/750, Vinyl Windows Series 6600/6800 (TrustGard brand), Sliding Glass Doors Series 9900, as well as Therma-Tru entry doors and Larson storm doors as authorized dealers. Commercial products are organized by window type including Single Hung (500H, 515, 4100), Double Hung (700, 710, 715), Fixed Windows (550, 750, 850, 4150, 4151, 1450), Casement/Projected (800-1900 Series), and Horizontal Sliding (525/526, 725, 4125), plus Impact Products (4100HD, 4125HD, 4150HD, 9950HD, 1401H) and Terrace Doors (1400, 1420 Series). All aluminum products feature the company's proprietary Thermal Barrier technology using polymer insulation to reduce heat transfer.
Differentiator
Problem solved
Functional benefit
Brands
- TrustGard: Vinyl window brand under Thermal Windows, featuring fully welded vinyl windows available in Series 6600 and 6800.
- ThermalSafe
- Thermal Barrier
- TS28 Triple Silver Glass
Products and services
- Single Hung Series 500 Windows Single hung aluminum residential windows featuring polymer Thermal Barrier technology, tilt-in sashes for easy cleaning, hidden security locks, and multiple color finishes; can be mulled together for various configurations. Built to custom specifications at the Tulsa facility.
- Double Hung Series 700 Windows Double hung aluminum residential windows with classic design and Thermal Barrier insulation, center cam locks, hidden metal security locks, carbon steel spiral sash balances, and tilt-in sashes for cleaning.
- Horizontal Rolling Windows Series 525/725 Horizontal sliding residential windows available in single or double sash configurations with sealed 7/8-inch insulated glass, center cam locks, corrosion-resistant metal rollers, and high-density pile weatherstripping.
- Casement & Awning Windows Series 900/925 Casement and awning residential windows with stainless steel commercial-strength hinges, EZ-Clean hinge system, and low-profile Fold-Away handles. Combine picture window views with ventilation capability.
- Picture Windows Series 550/750 Fixed picture windows custom manufactured in various shapes and sizes with sealed 1-inch insulated glass for optimum thermal efficiency and certified air, water, and structural performance.
- Vinyl Windows Series 6600/6800 TrustGard Fully welded vinyl windows with beveled exterior and smooth interior under the TrustGard brand. Features include reinforced interlocking meeting rails, 7/8-inch insulated glass, and options including divided lites, Low-E glass, and Argon gas fill.
- Sliding Glass Doors Series 9900 Aluminum sliding glass doors featuring Thermal Barrier technology with sealed 7/8-inch insulated glass, interlocking meeting rails, and multiple configuration options (OX, XO, OXO, OXXO) for residential applications.
- Therma-Tru Entry Doors Therma-Tru exterior entry doors sold and installed by Thermal Windows as an authorized dealer, including entry doors with sidelights, hinged doors with internal mini blinds, and French doors for residential applications.
- Larson Storm Doors Larson storm doors sold and installed by Thermal Windows as an authorized dealer, available with full view, retractable screens, pet doors, and multi-point locking systems for residential applications.
- Commercial Single Hung Windows (Series 500H, 515, 4100) Commercial-grade single hung windows including Series 500H, 515, 515C, 515D, 4100, and 4100HD impact-rated variants with polymer thermal barrier, hidden security locks, and various AAMA performance ratings for commercial construction projects.
- Commercial Double Hung Windows (Series 700, 710, 715) Commercial double hung windows in Series 700, 710, and 715 with various AAMA ratings, combining classic design with energy-saving Thermal Barrier technology for commercial applications.
- Commercial Fixed Windows (Series 550, 750, 850, 4150, 4151, 1450) Commercial fixed windows including Series 550, 750, 850, 850U, 4150, 4150HD, 4151, and 1450, with maximum viewing space, high energy efficiency, and various AAMA performance ratings up to AW80 for commercial buildings.
- Commercial Casement/Projected Windows (Series 800–1900) Commercial casement and projected windows including Series 800, 800U, 810, 820, 825, 825U, 835, 835U, 885, 875, 900, 910, 925, and 1900 Tilt/Turn, available in inswing and outswing configurations for commercial buildings.
- Commercial Horizontal Sliding Windows (Series 525/526, 725, 4125) Commercial horizontal sliding windows including Series 525H, 526C, 526D, 725, 4125, and 4125HD impact-rated variants, available in three-lite configurations (XOX, OXO, XOO, OOX).
- Commercial Impact Products (Series 4100HD, 4125HD, 4150HD, 9950HD, 1401H) Impact-resistant windows and doors designed for hurricane and severe weather conditions, including laminated glass with advanced glazing techniques. Used for military construction, coastal applications, and ATFP-rated projects such as Fort Leonard Wood.
- Commercial Terrace Doors (Series 1400, 1420) Commercial terrace doors including Series 1400 (1401F, 1402F) and Series 1420 (1421F, 1422F), featuring polyamide thermal struts, inswing and outswing models, designed for balcony access in high-rise commercial buildings.
- Commercial Sliding Glass Doors Series 9900 (9910, 9950, 9950B) Commercial sliding glass doors including Series 9910, 9950, 9950B, 9950B5, 9950B8 with various AAMA ratings (CW30 to AW80), featuring smooth operation, maximized viewing area, and combinable with Series 4151 transom windows.
- Residential Window and Door Installation Services Professional installation services for residential windows and doors performed by Thermal Windows-employed crews. Lifetime Limited Warranty applies only to products installed by Thermal Windows. Typical residential projects are completed in 1–2 days.
- Commercial Architectural Consultation and Specification Support Architectural consultation, CAD specifications, technical documentation, product delivery, and post-installation guidance provided to commercial builders, developers, architects, and design professionals nationwide through a dedicated commercial sales team and field sales representative network.
Quantifiable outcome
- Windows account for 25-30% of heating and cooling energy loss in typical homes
- +3 more outcomes
Companies that use Thermal Windows
Customer profileNamed customers17 records
Segments6 records
Ideal customer profiles2 records
Thermal Windows technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Thermal Windows partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- Therma-TrucoreThermal Windows is an authorized dealer and installer of Therma-Tru exterior doors. Products include entry doors with sidelights, hinged doors with internal mini blinds. Therma-Tru doors improve energy efficiency, curb appeal, and home value.
- LarsoncoreThermal Windows is an authorized dealer and installer of Larson storm doors. Storm doors available with full view, retractable screens, pet doors, and multi-point locking systems for additional security.
Scale indicators3 records
Recent moves5 records
Expansion highlights5 records
Thermal Windows competitors and assessment
Company assessmentDirect peers
- JELD-WEN: Public global manufacturer of windows, doors, and related building products serving residential and commercial markets. Comparable on range of window/door SKUs, energy-performance ratings, and national distribution to builders and developers.
- Marvin (Marvin Windows and Doors): Premium U.S. window and door manufacturer known for made-to-order, energy-efficient products sold through dealers to residential and commercial customers. Closely comparable to Thermal Windows on custom build, dealer/showroom model, and architectural specification.
- PGT Innovations: Manufacturer of impact-resistant windows and doors (WinDoor, CGI, PGT Custom Windows + Doors). Directly comparable to Thermal Windows' impact/ATFP commercial product lines for hurricane-zone and military construction.
- Sierra Pacific Windows: Custom window and door manufacturer serving residential and commercial markets with made-to-order aluminum, wood, and vinyl lines. Directly comparable on custom manufacturing, energy-efficiency focus, and builder/architect channel.
- Quaker Windows & Doors: U.S. manufacturer of custom windows and doors for residential and commercial construction, with strong Midwest U.S. presence. Comparable on custom build, commercial project support, and energy-efficiency product positioning.
- MI Windows and Doors: Large U.S. manufacturer of vinyl and aluminum windows and patio doors for residential and commercial/light-commercial markets. Comparable on aluminum/vinyl window mix, energy-efficient product range, and multi-family builder channel.
- Milgard Windows & Doors: U.S. window and patio door manufacturer (now part of MI Windows and Doors) offering vinyl, aluminum, and fiberglass lines for residential and light commercial. Comparable on custom sizing, regional manufacturing model, and energy-performance products.
- Harvey Building Products: Northeast U.S. manufacturer and distributor of windows, doors, and porch enclosures serving residential replacement and new construction. Comparable on custom-manufactured, energy-efficient window portfolio and direct dealer/showroom go-to-market.
- Andersen Corporation: Largest U.S. window and door manufacturer, offering residential and commercial fenestration including energy-efficient, impact-rated, and custom-configured products. Directly comparable to Thermal Windows on product breadth, custom capability, and national commercial reach.
- Pella Corporation: Major U.S. window and door manufacturer with deep residential replacement business and commercial/architectural product lines. Comparable on custom sizing, energy-efficiency focus, and builder/architect channel presence.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Thermal Windows social profiles
Digital presenceThermal Windows financial estimates
Financial estimateRevenue estimate
Valuation estimate
Thermal Windows leadership team
Management profileNumber of profiles
Profiles1 record
Thermal Windows funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Thermal Windows 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 Thermal Windows
What does Thermal Windows do?
Thermal Windows is a custom manufacturer of energy-efficient aluminum and vinyl windows and sliding glass doors, producing made-to-order products in its Tulsa, Oklahoma facility since 1979. The company serves residential homeowners through company-owned showrooms and installation crews, and supports commercial builders, developers, and architects nationwide through a dedicated sales rep network. Proprietary Thermal Barrier polymer technology, TS28 Triple Silver Glass, ThermalSafe laminated glass, Low-E coatings, and argon gas fills form the core technical differentiators across its window and door product lines.
Is Thermal Windows a public or private company?
Thermal Windows is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Thermal Windows founded?
Thermal Windows was founded in 1979. It employs 101 to 250 people.
Where is Thermal Windows based?
Thermal Windows is headquartered in Tulsa, United States, in the North America region.
How does Thermal Windows make money?
Three revenue lines are on record. Window and Door Manufacturing & Sales are the primary driver. The others are residential Installation Services and commercial Project Support.
Who are Thermal Windows's main competitors?
Direct peers on record are JELD-WEN, Marvin (Marvin Windows and Doors), PGT Innovations, Sierra Pacific Windows, Quaker Windows & Doors, MI Windows and Doors, Milgard Windows & Doors, Harvey Building Products, Andersen Corporation and Pella Corporation.
Does Thermal Windows have an API?
No public API is recorded for Thermal Windows.
What industry is Thermal Windows in?
Thermal Windows's product category is Windows and Doors Manufacturing. Its primary akta.pro industry code is IMADAIAC, Windows, with a secondary code of IMADAHAF, Low‑E, Solar Control & Energy-Efficient Coated Glass. Its NAICS code is 332321 and its SIC code is 3442.