What Isothermic does

Isothermic Portes et Fenêtres is a privately held Canadian fenestration manufacturer founded in 1982 and headquartered in Thetford Mines, Quebec. The company designs, fabricates, and installs doors and windows across PVC, aluminum, wood, and hybrid constructions, with named product lines including Series 1/2/3 PVC windows, SlimLine 38, MasterLine 8/10 aluminum systems, and a portfolio of entry, patio, balcony, folding, and garage doors. Its technical differentiators are 12 Passive House certified SKUs and 8 patents pending, including the proprietary PACE Wall facade system.

The company serves two primary customer segments: individual residential buyers reached through a national dealer network and corporate stores, and commercial and multi-residential developers (with referenced projects such as ALT Hotel, Novotel, Le Monarque, CONCREA - Le Vital, and Edyfic - Myral). It operates a 216,000 sq ft Thetford Mines plant plus a newer Bois-des-Filion facility, a Certified Installer Program for third-party installers, and an SAV+ after-sales service, with consumer financing delivered through Financeit and aluminum facade systems delivered through a Reynaers Aluminium partnership. Revenue is generated from product sales, project-based installation contracts, and after-sales service, with no disclosed financial figures.

Name

Isothermic

Legal name

Isothermic Portes et Fenêtres

Website

https://isothermic.ca

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

251–500 employees

Short description

Isothermic is a Quebec-based manufacturer and installer of PVC, aluminum, wood, and hybrid doors, windows, and facade systems, serving residential customers via dealers and multi-residential/commercial developers across Canada since 1982.

Ownership category

akta.pro rank

Headquarters

HQ city

Thetford Mines

HQ country

Canada

HQ region

North America

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Windows, Doors, and Façades Manufacturing and Sales: Core revenue from manufacturing and selling custom-made PVC, aluminum, wood, and hybrid windows, entry doors, patio doors, balcony doors, folding doors, garage doors, curtain walls, and PACE Wall envelope systems. Products are sold through corporate stores, authorized dealers, and direct project channels.
2. Installation Services: Certified installation services provided through a national network of trained installers. Installation includes professional measurement, certified installation per CSA A440.4-19 standards, and post-installation support.
3. Replacement Parts and After-Sales Service: SAV+ after-sales service program providing replacement parts, service requests, and warranty support. Contact via [email protected] or through branches and authorized dealers.
4. Financing Services Partnership: Partnership with Financeit to offer customer financing options. Isothermic facilitates financing but does not directly earn revenue from financing; the partnership drives higher transaction values.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Isothermic manufactures and sells custom-made windows, entry doors, patio doors, balcony doors, folding doors, garage doors, curtain walls, and the PACE Wall prefabricated building envelope system in PVC, aluminum, wood, and hybrid materials. The company distributes products through its own corporate retail stores, a national network of authorized dealers, and direct project sales to developers, architects, and contractors, and complements sales with certified installation services and an SAV+ after-sales service program.

Product overview

Isothermic is a Quebec-based Canadian manufacturer of doors, windows, and façade systems offering a comprehensive product portfolio across multiple materials (PVC, aluminum, wood) and price tiers. The product lineup includes three PVC window series (Series 1, 2, 3), four aluminum window series (SlimLine 38 with HI+ variant, MasterLine 8, MasterLine 10), entry doors in steel/aluminum/wood, patio/balcony/folding/garage doors in various materials, and commercial façade systems including PACE Wall (prefabricated high-performance envelope), Unitized Curtain Wall, Window Wall, and curtain wall series (SlimWall 35, ConceptWall 50, ConceptWall 60). The company also provides complementary services including certified installation programs and SAV+ after-sales support, positioning itself as a single-source provider for residential, multi-residential, and commercial building envelope solutions.

Differentiator

Problem solved

Functional benefit

Brands

• PACE Wall: High-performance prefabricated building envelope system designed for multi-residential and high-rise buildings
• SAV+

Products and services

• Series 1 PVC Windows Entry-level PVC window series offering reliable performance for budget-conscious homeowners and residential projects.
• Series 2 PVC Windows Mid-range PVC window series offering enhanced thermal performance and features for mainstream residential applications.
• Series 3 PVC Windows Premium PVC window series delivering the highest performance specifications in the PVC range for advanced energy-efficient homes.
• SlimLine 38 Aluminum Windows Aluminum window system featuring slim steel-look profiles (~33mm minimum visible sightline) manufactured under Reynaers license, available in Classic, Cubic, and Ferro variants for residential and commercial projects.
• SlimLine 38 HI+ Aluminum Windows High-insulation version of the SlimLine 38 aluminum system achieving Passive House-level thermal performance while maintaining a slim steel-look aesthetic, with Uw values as low as approximately 0.74 W/m²K.
• MasterLine 8 Aluminum Windows Mid-range aluminum window series by Reynaers offering strong thermal and structural performance for residential and commercial applications.
• MasterLine 10 Aluminum Windows Premium aluminum window series by Reynaers delivering the highest thermal performance in the aluminum range for demanding residential and commercial projects.
• Wood Windows Natural wood windows combining traditional aesthetics with modern thermal and structural performance standards.
• Entry Doors Entry doors available in steel, aluminum, and wood, combining security, aesthetics, and thermal performance for residential applications.
• Patio Doors Patio doors available in PVC, hybrid, aluminum, and wood with various glazing options and hardware configurations for residential and multi-residential projects.
• Balcony Doors Balcony doors in hybrid and aluminum options designed for multi-residential and residential applications requiring elevated performance.
• Folding Doors Accordion/folding doors that transform large openings into living spaces, enabling expansive glazed connections between interior and exterior areas.
• Garage Doors Garage doors offered as part of Isothermic's comprehensive residential door portfolio.
• PACE Wall Prefabricated Building Envelope High-performance prefabricated building envelope system for multi-residential and high-rise buildings up to 70 storeys, targeting up to R-50 effective thermal resistance, 0.06 L/s·m² air leakage, 2000 Pa water resistance, and 5.3 kPa wind resistance.
• Unitized Curtain Wall Prefabricated unitized curtain wall system for commercial and high-rise applications, providing complete envelope solutions.
• Window Wall System Window wall system installed between floor slabs, integrating openings within conventional building envelopes for multi-residential and commercial projects.
• SlimWall 35 Curtain Wall Slim-profile curtain wall series designed for residential applications requiring architectural glazing with contemporary aesthetics.
• ConceptWall 50 Curtain Wall Curtain wall series offering architectural flexibility and performance for commercial and residential applications.
• ConceptWall 60 Curtain Wall Premium curtain wall series with enhanced performance specifications for high-demand architectural applications.
• Certified Installation Services Professional certified installation service delivered through a national network of trained installers compliant with CSA A440.4-19 standards, including professional measurement, certified installation, and post-installation support.
• SAV+ After-Sales Service After-sales service program providing replacement parts, repair, servicing, and warranty support for installed Isothermic products.

Quantifiable outcome

• 12 Passive House-certified products (PHI and PHIUS) across windows, doors, and façades
• +6 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Reynaers AluminiumcoreTechnology or IntegrationIsothermic is one of the few Reynaers certified manufacturers in Canada and among a select group in North America. Produces SlimLine 38, MasterLine 8, and MasterLine 10 aluminum window systems under license, combining European design with North American manufacturing.
• Tree CanadacoreStrategic or Co-development PartnerIsothermic partners with Tree Canada as part of its national greening program, demonstrating environmental commitment and corporate sustainability responsibility.
• FinanceitcoreChannel Partner/ Reseller/ DistributorFinanceit provides customer financing options for Isothermic products, offering no deposit required, up to 100% financing, flexible payment schedules up to 240 months. Available at all corporate stores and select authorized retailers.
• David AubertminorStrategic or Co-development PartnerMajor acquisition and leadership figure who has driven Isothermic's expansion, including the new Bois-des-Filion facility and PACE Wall launch.
• Google AnalyticsminorOthersThird-party analytics service used to understand website visitor behavior and optimize content. Data is anonymized and used only for statistical reporting.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Emerging players

• Centor: Specialist manufacturer of folding (bi-fold) doors and integrated window screening systems for residential and light commercial applications. Comparable to Isothermic where their product lines intersect on large-opening folding doors and high-performance weather-rated openings, though Centor is more niche and premium-focused.

Broad incumbents

• Marvin Windows and Doors: Family-owned US premium manufacturer of wood, aluminum-clad wood, and Ultimate fiberglass windows and doors serving residential and commercial markets. Closely parallels Isothermic's positioning in high-end Reynaers aluminum and Passive House-grade products, though at substantially larger scale.
• Pella Corporation: Major US-based manufacturer of windows and doors in wood, vinyl, fiberglass, and aluminum serving new construction, replacement, and commercial channels. A broad incumbent that overlaps with Isothermic's residential-to-light-commercial positioning and its use of expert-led sales consultations.
• Ply Gem: North American manufacturer of exterior building products including vinyl windows and patio doors serving new construction, repair-remodel, and multi-family markets. Comparable to Isothermic on volume residential PVC fenestration and on its dealer-led channel structure for replacement and renovation.
• JELD-WEN: Global manufacturer of windows, doors, and related building products across North America, Europe, and Australia, with strong presence in interior and exterior doors as well as fenestration. A broad incumbent comparable to Isothermic's combined window + door portfolio and its engagement with multi-family / commercial project channels.
• Andersen Windows & Doors: One of North America's largest window and door manufacturers, offering wood, vinyl, composite, and aluminum-clad product lines across residential and commercial channels. A broad incumbent comparable to Isothermic on product breadth and dealer-channel reach, though at dramatically larger scale and with established US-wide distribution.

Direct peers

• Loewen Windows: Premium Canadian manufacturer of wood, aluminum-clad wood, and contemporary windows and doors serving residential and high-end commercial markets across North America. Directly comparable to Isothermic's premium Reynaers aluminum and wood product lines, with similar Passive House-grade performance positioning.
• Gentek Building Products: Canadian-based manufacturer and distributor of vinyl siding, windows, and other exterior building products serving residential new construction and renovation markets. Comparable to Isothermic's residential and multi-residential segments and its dealer/retailer-based distribution strategy in Canada.
• Vinyl Window Design: Canadian manufacturer of custom vinyl (PVC) windows and doors serving eastern Canada through dealers and direct channels. Directly comparable to Isothermic on the Series 1–3 PVC product set, with overlapping residential and mid-rise project customer profiles.
• All Weather Windows: Edmonton-headquartered Canadian manufacturer of vinyl, PVC, hybrid, and aluminum windows and doors with national distribution. Comparable to Isothermic across product breadth (residential and light commercial), multi-material manufacturing, and a Canadian dealer-driven go-to-market model — making it the closest direct public peer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/isothermicinc
• Facebookfacebook.com/IsothermicInc

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Isothermic