What Partie 5 does

Partie 5 is a Quebec-based building science consulting firm operating as a division of STGM Architecture, a multidisciplinary architecture and built-environment firm. The company provides specialized consulting services focused on the building envelope — the physical separator between interior and exterior environments — diagnosing issues of heat, air, and moisture transfer and recommending corrective measures. Its practice spans eight service areas: technical expertise and forensic investigations, facade inspections (including under Quebec's Bill 122), building envelope commissioning, energy performance analysis compliant with the National Energy Code of Canada for Buildings (NECB), hygrothermal behavior analysis, infrared thermography, diagnostic air and water leakage testing, and LEED certification support.

The firm's underlying technology combines physics-based numerical simulation tools (WUFI Pro for hygrothermal modeling, THERM and HEAT3 for thermal resistance evaluation) with field inspection capabilities including Level II certified thermography per ASTM standards, SPRAT-certified rope access for facade examination, and in-situ hygrothermal sensor monitoring. Methodology is anchored in standardized protocols (ASTM E1186-22, AAMA 501.2) rather than proprietary software.

Partie 5 generates revenue through project-based consulting engagements sold primarily to architects, contractors, manufacturers, and public/private building owners and managers across Quebec. Services are scoped and priced per project rather than via standardized or subscription pricing. The firm maintains four offices (Montreal, Quebec City, Baie-Comeau, Longueuil) within the STGM network and reaches clients through direct relationships, industry association involvement (Ordre des architectes du Québec, Bâtiment durable Québec), conference presentations, and professional training delivery. Notable client engagements include Quebec Parliament, Sûreté du Québec, and multiple Quebec schools, with a documented heritage building and facade safety inspection practice.

Name

Partie 5

Legal name

Partie 5

Website

https://partie5.ca

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Partie 5 is a Quebec-based building science consulting firm (division of STGM Architecture) providing diagnostic, inspection, commissioning, and energy performance services for building envelopes to architects, contractors, manufacturers, and public/private building owners.

Ownership category

akta.pro rank

Product category

Building Science Consulting

NAICS

Testing Laboratories and Services (541380), Architectural, Engineering, and Related Services (5413)

SIC

Services-Testing Laboratories (8734), Services-Engineering Services (8711)

akta.pro primary industry

Third-Party Certification, Code Compliance & Regulatory Inspection (ASME/API/ISO) (EUAEAHAN)

Keywords

• Building science consulting
• Building envelope analysis
• Facade inspection services
• Hygrothermal performance assessment
• Energy code compliance

Headquarters

HQ city

Montreal

HQ country

Canada

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Building Science Consulting Services: Professional consulting services providing technical expertise in building envelope performance, including technical investigations, inspections, commissioning, and energy performance analysis. Revenue is generated through project-based consulting engagements with architects, contractors, manufacturers, and building owners.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Partie 5 is a Quebec-based building science consulting firm specializing in building envelope performance. The firm delivers eight core service lines covering technical expertise/forensic investigation, facade inspections (including Quebec Bill 122 compliance), building envelope commissioning, energy performance analysis per NECB standards, hygrothermal behavior analysis, infrared thermography, diagnostic testing for air and water leakage, and LEED certification support. Services are delivered by a multidisciplinary team of certified thermographers, professional engineers, architects, and technologists.

Product overview

Partie 5 is a building science consulting firm organized as a single integrated service offering with eight distinct practice areas. The core portfolio centers on building envelope performance optimization, encompassing technical expertise and forensic investigations, facade inspections, building envelope commissioning, energy performance analysis (NECB), hygrothermal behavior analysis, thermography, diagnostic testing, and LEED certification support. These services work together as a unified consulting practice focused on the interrelationships between building materials, assemblies, and environmental conditions.

Differentiator

Problem solved

Functional benefit

Products and services

• Technical Expertise Building envelope deficiency investigation and forensic analysis service that identifies root causes of failures, assesses impacts, and recommends corrective measures through on-site observation and material behavior analysis, for architects, contractors, and building owners.
• Facade Inspections Periodic facade inspection service ensuring safety and regulatory compliance under Quebec's Bill 122, including rope access techniques for close-up examination of building facades for owners of institutional, commercial, and residential buildings.
• Building Envelope Commissioning Quality assurance service throughout design and construction phases, including review of drawings and shop drawings, factory and site inspections, and verification of building envelope installation for project teams and contractors.
• Energy Performance (NECB) Energy code compliance service supporting project teams in evaluating thermal performance of envelope systems in accordance with the National Energy Code of Canada for Buildings, using THERM and HEAT3 software, for architects and building owners.
• Analysis of Hygrothermal Behavior Thermal and hygrothermal analysis service evaluating heat and moisture transfer through building envelope assemblies using in-situ monitoring and WUFI Pro numerical simulations, for design teams on new construction and heritage projects.
• Thermography Infrared thermographic inspection service for facades and roofing systems to detect heat loss, air leakage, and building envelope deficiencies per ASTM standards, performed by Level I and Level II certified thermographers for building owners and managers.
• Diagnostic Testing Standardized field testing service for airtightness and watertightness evaluation, including smoke testing and water penetration testing per ASTM E1186-22 and AAMA 501.2, for building owners and design teams pinpointing sources of air and water leakage.
• LEED Certification Sustainable building certification support service helping project teams meet building envelope performance requirements for LEED v4 certification.

Quantifiable outcome

• Over 20 years of accumulated experience through hundreds of consulting assignments and forensic investigations
• +2 more outcomes

Named customers6 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

Feature5 records

Partnerships

One partnership is on record.

• STGM ArchitecturecoreStrategic or Co-development PartnerPartie 5 is a division/subsidiary of STGM Architecture, a multidisciplinary firm recognized for its expertise in buildings and the built environment. Partie 5 operates as the building science consulting arm of STGM, applying specialized expertise in building envelope science to support STGM's broader architectural services.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Regional players

• EXP: Quebec-headquartered multidisciplinary engineering firm offering building sciences, envelope, and energy services across Eastern Canada — direct in-region competitor for Quebec-based building envelope mandates.
• GHD: Global engineering consultancy with a building sciences practice serving institutional, commercial, and government clients in Canada; competes on envelope commissioning, energy modeling, and condition assessment work.

Broad incumbents

• Stantec: Global design and engineering firm with building envelope and building performance services (strengthened by the Morrison Hershfield acquisition); competes on larger integrated mandates where Partie 5 partners as a subconsultant.
• AtkinsRéalis: Major Canadian-headquartered engineering firm with building services and sustainability practices addressing envelope performance, energy code compliance, and commissioning at scale across institutional and government clients.
• WSP: Global engineering professional services firm with a substantial building sciences and envelope practice; competes for the same Quebec institutional and commercial mandates but as part of a much broader portfolio across many disciplines.

Direct peers

• Read Jones Christoffersen (RJC Engineers): Canadian structural and building science engineering firm with restoration, building envelope, and forensic practice serving architects, owners, and contractors on building performance and rehabilitation projects.
• Morrison Hershfield: Long-standing Canadian building envelope, structural, and building science consulting firm (now part of Stantec) with comparable services including facade engineering, thermography, and building commissioning for institutional and commercial clients.
• BVGlazing Systems: Building envelope and facade engineering consultancy specializing in glazing, curtain wall, and envelope performance consulting — overlapping with Partie 5's facade inspection, diagnostic testing, and commissioning practices.
• Entuitive: Toronto-based building science, structural, and restoration engineering firm offering building envelope consulting, forensic investigation, and rehabilitation planning for similar institutional and commercial clients.
• RDH Building Science: Canada's leading independent building science and building envelope consulting firm with deep hygrothermal modeling, forensic investigation, and commissioning capabilities — directly comparable in service mix, technical depth, and target client base (architects, contractors, building owners).

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/partie5

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

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 Partie 5