Specialized roofing services designed for St Thomas's unique Southern Ontario climate challenges, including our annual 100cm snowfall and seasonal temperature extremes. Our heritage-conscious approach ensures your roof stands strong while preserving the distinct character of Railway City homes.
Lifetime Warranty
Workmanship Guaranteed
24/7 Emergency
Rapid Response Teams
0% Financing
Flexible Payment Plans
Serving St Thomas for 8 years, our team has completed 1,200 roofing projects across the Southern Ontario. We understand St Thomas's unique climate challenges, building codes, and architectural styles.
St Thomas demands roofing solutions as unique as its railway heritage and historic architecture. From protecting century homes in the Downtown core to servicing modern developments in the North End, we understand the diverse needs of each neighborhood. Our expertise handles the heavy 100cm annual snowfall, while considering the distinct architectural requirements of both heritage and contemporary homes. With particular attention to ice dam prevention in the South End's exposed areas and wind resistance in the West End's open spaces, we deliver tailored roofing solutions across St Thomas.
Choose from our comprehensive range of roofing solutions, each engineered for Ontario's extreme weather conditions and backed by industry-leading warranties.

Historic Beauty Meets Modern Protection
Engineered specifically for St Thomas's variable climate, with enhanced grip for our significant snowfall and wind resistance for lake effect weather. These shingles complement both heritage homes and modern builds while providing superior protection against our harsh Ontario winters.
Enhanced snow guard technology for 100cm annual accumulation
Lake effect wind resistance up to 130 km/h
Heritage color profiles matching Downtown St Thomas architecture
Double-reinforced ice dam protection system
Cool roof technology for hot Southern Ontario summers
Advanced drainage channels for heavy spring rains
Available Colors:
Starting from $18,563 - $24,132 (avg 2,000 sq.ft roof)
* Pricing includes complete tear-off, disposal, deck inspection, underlayment, ventilation, and warranty registration. Exact pricing depends on roof size, pitch, and accessibility.
Historic Downtown homes, Heritage districts, and modern subdivisions
Schedule your free roof inspection online or contact us for a detailed proposal with material samples.
A quality roof is more than just shingles. Learn about the critical components that protect your St Thomas home from Ontario's extreme weather.

3D Exploded View: See every layer of a complete roofing system
Engineered 5/8" roof decking rated for St Thomas's substantial snow loads up to 100cm. Features enhanced joist spacing and moisture-resistant treatment specific to Southern Ontario's freeze-thaw patterns.
Premium ice and water barrier extending 6 feet beyond warm wall for St Thomas's 100cm annual snowfall. Includes specialized adhesive backing for extreme temperature fluctuations common in Southern Ontario.
Synthetic underlayment with advanced vapor permeability designed for St Thomas's varying humidity levels. Features enhanced grip surface for installer safety during typical Ontario weather conditions.
Wind-rated starter strips designed for St Thomas's exposure patterns, with enhanced adhesive strips rated for 130 mph gusts. Includes specialized cold-weather installation properties for Ontario winters.
Impact-resistant architectural shingles rated for St Thomas weather extremes. Features enhanced granule adhesion for Southern Ontario freeze-thaw cycles and UV protection.
High-profile ridge caps engineered for optimal ventilation in St Thomas's climate zones. Includes enhanced wind resistance and snow barrier properties for Ontario winter conditions.
Balanced ventilation system calibrated for St Thomas's temperature range of -20°C to +30°C. Features enhanced vapor release during humid summers and condensation prevention during cold winters.
Heavy-gauge aluminum flashing with specialized ice dam prevention features for St Thomas winters. Includes enhanced step flashing for local precipitation patterns and snow accumulation zones.



Every roof replacement follows our proven process designed to protect your property and deliver lasting results.

3D Cross-Section: Complete roofing system showing all protective layers
Our team begins with a thorough roof assessment and consultation with St Thomas building department for required permits. We evaluate existing conditions, measure precisely, and create a detailed project plan considering local building codes and St Thomas's unique architectural styles.
We coordinate material delivery to your St Thomas property with consideration for narrow downtown streets or historic district access. Our drivers are familiar with local routes and neighborhood restrictions, ensuring efficient delivery to any location from Lynhurst to Shaw Valley.
During tear-off, we monitor St Thomas weather forecasts carefully, especially during spring and fall transition seasons. Our team uses specialized tarping methods to protect your home from sudden weather changes common to Southern Ontario while preparing the deck surface.
Given St Thomas's significant winter snowfall, we install premium ice and water shield extending 6 feet beyond interior walls. Special attention is paid to valleys and eaves where ice dams commonly form during Ontario's freeze-thaw cycles.
We use high-wind rated architectural shingles tested for Southern Ontario conditions. Installation includes six nails per shingle and upgraded starter strips to resist St Thomas's lake-effect winds and heavy snow loads typical from December through March.
Proper ventilation is crucial in St Thomas's variable climate. We install ridge vents and ensure adequate intake ventilation to manage summer heat and winter moisture. This balanced system prevents ice damming and extends roof life in our local conditions.
Our final inspection adheres to St Thomas building codes and our own rigorous standards. We verify all flashing, ensure proper ventilation ratios, and conduct a thorough site cleanup. All work is documented for warranty purposes and municipal requirements.
From lake-effect snow to summer heat waves, St Thomas roofs face unique challenges. Here's how we engineer protection.

Balanced attic ventilation prevents ice dams, extends roof life, and reduces energy costs
The Challenge:
St Thomas experiences significant ice dam risk due to average winter snowfall of 100cm and frequent freeze-thaw cycles. Snow accumulation on poorly insulated roofs leads to melting and refreezing at eaves, causing destructive ice buildup.
Our Solution:
We implement a comprehensive ice dam prevention system including enhanced attic insulation, proper ventilation, and premium ice and water shield extending 6 feet up from all eaves. Heated cables are installed where necessary in problem areas.
The Challenge:
St Thomas faces strong winds from Lake Erie weather systems, particularly during spring and fall storms. Gusts can exceed 90 km/h, potentially lifting and damaging improperly installed shingles and causing moisture infiltration.
Our Solution:
Our wind-resistant installation uses six-nail patterns, upgraded starter strips, and high-wind rated shingles. We pay special attention to rake edges and ridges, using enhanced sealant methods and reinforced ridge caps.
The Challenge:
St Thomas experiences extreme temperature variations from -20°C in winter to 30°C in summer. These fluctuations cause thermal shock to roofing materials, leading to expansion, contraction, and potential premature aging.
Our Solution:
We select temperature-resistant materials specifically rated for Southern Ontario climate extremes. Our installation techniques account for thermal movement, and we ensure proper attic ventilation to minimize temperature-related stress.
The Challenge:
St Thomas's proximity to Lake Erie results in high humidity levels and frequent precipitation. Annual rainfall averages 900mm, creating significant moisture management challenges for roofing systems.
Our Solution:
Our moisture protection strategy includes synthetic underlayment, proper flashing at all penetrations, and a balanced ventilation system. We ensure adequate drainage slopes and use moisture-resistant materials throughout the system.
Comprehensive Protection
Every roof installation includes dual warranty coverage: our lifetime workmanship guarantee plus manufacturer product warranties registered in your name.
Our lifetime workmanship warranty protects St Thomas homeowners against installation-related issues for as long as you own your home. Given our city's historic architecture and variable climate, this comprehensive coverage ensures your investment is protected through every season, backed by our local reputation since 1985.
Manufacturer warranties in St Thomas are enhanced through our certified contractor status, offering up to 50 years of coverage on premium roofing systems. This includes protection against material defects, algae resistance, and wind damage up to 130 mph - crucial for our Lake Erie-influenced weather patterns.
Our exclusive leak-free guarantee addresses St Thomas's unique weather challenges, from heavy spring rains to winter ice damming. We guarantee your roof will remain watertight for 15 years, with rapid response service within 24 hours if any issues arise during our harsh Canadian winters.
Tailored for St Thomas's historic homes and modern residences alike, our annual maintenance program includes detailed inspections of flashings, ventilation, and potential ice dam zones. We document all findings and provide preventative care to extend your roof's lifespan in our challenging climate.
Make Your Roof Affordable
Make your St Thomas roofing project affordable with our flexible financing solutions. We partner with local Ontario banks to offer competitive rates and convenient payment options designed specifically for our community members.
Enjoy interest-free financing for 12 months on complete roof replacements in St Thomas. This program helps homeowners manage the cost of protecting their historic or modern homes without financial strain.
Start your St Thomas roofing project today and don't pay for 6 months. Perfect for emergency replacements or planning ahead for winter, with no down payment required for qualified homeowners.
Choose payment terms up to 15 years with competitive rates for St Thomas residents. Monthly payments can be adjusted to fit your budget, with options to pay off early without penalties.
Most homeowners qualify for some level of financing. Apply today to learn your options.
We install products from industry-leading manufacturers, each offering unique benefits and comprehensive warranties.
North America's #1 Roofing Manufacturer
GAF's Timberline HDZ shingles are specifically engineered to handle St Thomas's freeze-thaw cycles and varying temperatures. With enhanced wind resistance up to 130 mph and advanced StainGuard Plus protection against blue-green algae, these shingles are backed by North America's largest roofing manufacturer and come with a 50-year non-prorated warranty.
Best For:
Premium residential installations with lifetime warranties
Canadian Manufacturing Excellence
As a proud Canadian manufacturer, IKO understands St Thomas's climate demands. Their Cambridge AR shingles feature ArmourZone technology for superior wind resistance and are produced in nearby London, Ontario. These shingles include built-in algae resistance and are tested in Canadian weather conditions for optimal performance.
Best For:
Excellent value with proven Canadian performance
Stone-Coated Steel Roofing
DECRA stone-coated steel roofing provides exceptional durability for St Thomas homes, withstanding our harsh winters and hot summers. Their profiles complement both heritage and modern architecture while offering superior protection against hail, high winds, and ice damming - common challenges in our region.
Best For:
Permanent roofing for luxury homes and harsh climates
Not sure which manufacturer is right for you? We'll bring samples and help you choose during your free consultation.
Schedule Material ConsultationSt Thomas's historic downtown showcases stunning Victorian and Edwardian architecture, with many homes dating back to the railway boom of the 1800s. These heritage properties require specialized roofing knowledge to maintain their historic character while ensuring modern protection standards are met.
We source authentic slate, cedar shakes, and heritage-style asphalt shingles that match original roofing materials. Our suppliers provide historically accurate colors and textures specifically chosen for St Thomas's protected properties.
Our heritage roofing team combines traditional craftsmanship with contemporary techniques to preserve St Thomas's architectural legacy. We work closely with local heritage committees and maintain strict adherence to preservation guidelines while implementing durable, period-appropriate roofing solutions.
We balance heritage aesthetics with modern building code requirements for ventilation, fire rating, and structural safety.
Our team prepares detailed proposals and specifications for heritage committee review, streamlining the approval process.
Victorian, Edwardian, Arts & Crafts
Authentic cedar shake preserves historic character with natural grain patterns and weathered gray patina.
Gothic Revival, Italianate, Georgian
Quarried slate in traditional colors (Vermont green, purple, black) provides 100+ year lifespan.
Modern heritage-compatible option
High-definition shingles mimic cedar shake or slate appearance while meeting modern performance standards.
We've successfully completed roofing projects on dozens of heritage-designated properties. Let us handle the committee approval process.
Discuss Heritage ProjectOperating in St Thomas requires strict adherence to Ontario Building Code requirements and municipal safety standards. Our teams exceed all local and provincial safety regulations.
Full WSIB coverage protects our workers and St Thomas property owners throughout every project, ensuring peace of mind and compliance with local regulations.
We maintain comprehensive $7M liability insurance coverage specific to St Thomas operations, protecting both our clients and their properties.
Our St Thomas crews hold all required municipal certifications and undergo regular safety training specific to heritage and residential roofing.
OHSA-certified fall arrest systems and safety protocols on every job
Rated "Best of" multiple years with verified customer reviews and A+ BBB rating
Each St Thomas neighborhood presents unique roofing considerations. Downtown's heritage properties require specialized care, while North End homes often face wind exposure challenges. South End properties typically feature newer construction, and East Side homes frequently need enhanced drainage solutions due to the area's typography.
Our St Thomas team brings over 25 years of local roofing experience. We're active community members, supporting the Iron Horse Festival and local sports teams. Our crews understand the unique challenges of different St Thomas neighborhoods and maintain strong relationships with local suppliers and building officials.
St Thomas experiences diverse weather patterns, from humid summers to snowy winters. We schedule projects strategically, focusing on major installations during spring and fall. Summer allows for specialized repairs, while winter months are dedicated to emergency services and preliminary planning for upcoming projects.
As St Thomas's premier roofing contractor, we offer unmatched expertise in heritage restoration, comprehensive insurance coverage, and deep local knowledge. Our competitive pricing, lifetime workmanship warranty, and commitment to using premium materials from local suppliers set us apart from other contractors in the region.
Get answers to common questions about roof replacements, warranties, and our process.
Our roofing crews live and work throughout St Thomas, ensuring fast response times and local expertise.

Don't miss this 60% OFF offer! Contact us today.
📍 Visit Us
45 Worthington Dr Unit H
Brantford, ON N3T 5M1
✉️ Email Us
info@customcontracting.caSchedule your complimentary roof inspection and receive a detailed proposal with material samples, timeline, and warranty details. Our roofing advisors are here to answer every question.
Maximize your home's protection and curb appeal with our comprehensive exterior services
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Learn More →Many St. Thomas homeowners choose to bundle services for better pricing and convenience. Save up to 15% when you combine roofing services with these related services:
Gutter installation, repair, and maintenance
Transform your home's exterior with durable siding
Improve home comfort and energy efficiency
Protect your entire home exterior and save money. Our St. Thomas team can handle multiple projects seamlessly, saving you time and maximizing your investment.
Looking for roofing services in a nearby city? We proudly serve communities throughout Ontario with the same expert service you'd expect in St. Thomas.
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Tools and information to help you make informed decisions about your roofing project
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Expert tips on roofing materials, maintenance, and choosing the right contractor
Learn about roofing systems, warranties, and what to expect during your project
Our team has been serving St Thomas homeowners with hands-on expertise for years. We've completed thousands of projects across every neighborhood, understanding the unique challenges of St Thomas's climate, building codes, and property types.
All our contractors are: Licensed, insured, background-checked, and continuously trained on the latest industry standards and techniques. We invest in ongoing education to ensure we deliver cutting-edge solutions.
All our installation work is backed by our lifetime workmanship warranty
No hidden fees. Detailed quotes with all costs itemized upfront
We don't consider the job done until you're 100% satisfied