Reduce energy bills by 30% with proper attic insulation. Expert installation to R-60 with lifetime warranty and up to $1,000 in rebates.
From installation to ventilation, we're your complete attic insulation solution.
Fast, effective coverage for all attic spaces
Precision-fitted insulation for optimal R-value
Superior air sealing and insulation
Proper airflow prevents moisture damage
Safe removal of old or damaged insulation
Identify energy loss and efficiency issues
Choose the right insulation type for your home and budget—we'll help you decide.
From assessment to installation, we make your insulation project smooth and hassle-free.
We inspect your attic, measure current insulation depth and R-value, check ventilation, identify air leaks, and provide detailed recommendations—all free with thermal imaging.
Review insulation options and R-values, explain rebate process and requirements, schedule energy audit if needed, and prepare attic space for installation.
Air seal all ceiling penetrations, install or upgrade ventilation baffles, add insulation to achieve target R-value, ensure even coverage and proper depth, and protect living spaces.
Verify R-value achieved with depth measurements, ensure ventilation remains clear, complete thorough cleanup, process rebate paperwork, and guarantee your satisfaction.
Experience the difference with our certified installers and premium insulation products.
Trusted insulation experts across Ontario
Fully licensed with WSIB coverage
Lifetime workmanship warranty on installations
Help access up to $1,000 Enbridge rebates
Free thermal scans identify energy loss
Factory-trained insulation professionals
Proudly providing expert attic insulation services throughout the Greater Toronto and Hamilton areas.
Don't see your area? Contact us to confirm service availability.
Don't just take our word for it. See what homeowners say about our attic insulation services.
"Our energy bills dropped by $70/month after Custom Contracting insulated our attic to R-60. The house is so much more comfortable now. Excellent work and very clean crew!"
Andrew S.
Burlington, ON
"Finally no more ice dams! They properly insulated and ventilated our attic. Our second floor is no longer cold in winter. Professional service from start to finish."
Michelle D.
Hamilton, ON
"Great experience! They helped us get the Enbridge rebate, explained everything clearly, and completed the work in one day. House is noticeably warmer and our furnace runs less."
Paul R.
Oakville, ON
Get answers to common questions about insulation types, R-values, costs, and energy savings.
A: Attic insulation in Ontario typically costs $1.50-$3.50 per square foot installed, depending on insulation type and existing conditions. For an average 1,000-1,500 sq ft attic: blown-in cellulose or fiberglass costs $1,500-$3,500 (most economical), spray foam insulation costs $3,000-$7,000 (premium performance), and batt insulation costs $2,000-$4,000 (good for new construction). Additional costs include removing old insulation ($0.75-$1.50/sq ft), air sealing ($300-$800), and adding ventilation ($500-$1,500). Proper insulation pays for itself in 2-4 years through energy savings. We offer free estimates and qualify for Enbridge rebates up to $1,000.
A: Ontario Building Code requires minimum R-50 for attic insulation in most regions, though R-60 is recommended for maximum efficiency and comfort. R-50 equals about 14-16 inches of blown fiberglass or 13-14 inches of cellulose. Most older homes have only R-20 to R-30, losing significant heat. Higher R-values provide diminishing returns—R-60 is optimal for Ontario's climate, offering best cost-to-benefit ratio. We measure your current insulation depth and calculate exactly how much to add. Cathedral ceilings and enclosed soffits require different R-values and ventilation strategies.
A: Proper attic insulation can reduce heating and cooling costs by 15-30%, saving $300-$800+ annually for typical Ontario homes. Savings depend on: current insulation level (homes with R-10-R-20 see biggest savings), heating system efficiency, home size and air sealing quality, and local energy rates. Additional benefits include more consistent temperatures throughout home, reduced drafts and cold spots, less strain on HVAC equipment extending its life, improved comfort in all seasons, and increased home resale value. Most homeowners see payback in 2-4 years, then enjoy ongoing savings for 20-30+ years.
A: The best attic insulation depends on your specific situation. Blown-in cellulose is best for existing attics—excellent R-value per inch (R-3.5-R-3.8), made from recycled paper (eco-friendly), conforms to irregular spaces, resists settling better than fiberglass, and fire/pest treated. Fiberglass blown-in is good alternative—slightly lower R-value (R-2.5-R-3.0), very economical, non-flammable, and won't settle. Spray foam (closed-cell) offers best performance—highest R-value (R-6-R-7), air seals while insulating, moisture barrier included, but most expensive. We recommend blown cellulose for most Ontario attics—best performance-to-cost ratio.
A: Not always—we assess case-by-case. ADD to existing insulation if it's dry, intact, and mold-free, properly settled and evenly distributed, and adequate ventilation exists. REMOVE and replace if insulation is wet, moldy, or contaminated, compressed or damaged, mixed with vermiculite (may contain asbestos), has pest infestation or droppings, or inadequate ventilation causing moisture issues. Removing old insulation costs $0.75-$1.50/sq ft but allows us to air seal properly, inspect for roof leaks or damage, upgrade ventilation, and start fresh with optimal R-value. We provide honest recommendations based on your attic's condition.
A: Attic ventilation is critical—insulation without proper ventilation causes serious problems including ice dams in winter from warm attic melting roof snow, moisture accumulation leading to mold and rot, reduced insulation effectiveness from moisture, premature shingle failure from excessive heat, and voided roofing warranties in some cases. Proper ventilation requires balanced intake (soffit vents) and exhaust (ridge, gable, or roof vents), minimum 1 sq ft of ventilation per 300 sq ft of attic, and clear airflow path—baffles prevent insulation blocking soffits. We inspect and upgrade ventilation as part of every insulation project.
A: Yes! Proper attic insulation combined with air sealing and ventilation prevents ice dams by keeping your roof cold in winter. Ice dams form when: heat escapes through ceiling warming attic, warm attic melts snow on roof, water runs down and refreezes at cold eaves, ice backs up under shingles causing leaks. Solution requires R-50+ insulation to prevent heat loss, thorough air sealing of ceiling penetrations (lights, fans, hatches), proper ventilation to keep attic temperature near outdoor temp, and adequate soffit-to-ridge airflow. We address all three factors—insulation alone won't solve ice dam problems without proper air sealing and ventilation.
A: Yes! We help customers access Enbridge Home Efficiency Rebate Plus (HER+) for attic insulation. Available rebates include: attic insulation up to $1,000 (must reach R-50 minimum), basement insulation up to $1,000, wall insulation up to $5,000, combined with air sealing up to $1,000 additional, and energy audit required ($300 but often rebated). Rebates require pre- and post-upgrade energy audits, achieving minimum R-values, professional installation by certified contractors, and proper ventilation. We're Enbridge-approved contractors, handle all paperwork, ensure work qualifies, and help maximize your rebates. Combined with 0% financing, rebates make insulation very affordable.
A: Most attic insulation projects take 4-8 hours for a typical home, completing in one day. Timeline depends on: attic size (1,000 sq ft takes 4-6 hours), insulation type (blown-in fastest, batt takes longer), preparation needed (air sealing adds 2-4 hours), and old insulation removal if required (adds 4-8 hours). For average homes with existing access and no removal: blown-in insulation takes 4-6 hours, batt installation takes 6-8 hours, and spray foam takes 6-10 hours. We work efficiently to minimize disruption while ensuring quality installation. Most homeowners can stay home during installation—we protect your space and clean up thoroughly.
A: We provide a lifetime workmanship warranty on all attic insulation installations covering installation quality, proper R-value achievement, air sealing work, and ventilation installation. Material warranties vary by product: cellulose and fiberglass lifetime material warranty, spray foam lifetime adhesion warranty, and vapor barriers and air sealing materials 25-year warranties. Our warranty is fully transferable if you sell your home, adding value for buyers. Regular attic inspection every 3-5 years recommended to ensure ventilation remains clear and insulation hasn't settled or been disturbed. We stand behind our work with exceptional customer service and support.
Have more questions? We're here to help!
Contact Us TodayFor over 25 years, Custom Contracting has been Ontario's trusted choice for professional attic insulation services. We specialize in upgrading homes to Ontario Building Code requirements (R-50 minimum) and beyond to R-60 for maximum energy efficiency and comfort. Our expert installation reduces heating and cooling costs by 20-30% while preventing ice dams, eliminating drafts, and improving overall home comfort.
We install premium insulation materials including blown-in cellulose (our recommendation for most Ontario attics), blown fiberglass, batt insulation for new construction, and spray foam for maximum performance. Every installation includes thorough air sealing of all ceiling penetrations and proper attic ventilation—critical components often overlooked by other contractors. Without proper air sealing and ventilation, even R-60 insulation won't perform optimally and can lead to moisture problems.
As an Enbridge Home Efficiency Rebate Plus (HER+) approved contractor, we help homeowners access up to $1,000 in insulation rebates plus additional rebates for air sealing and other efficiency upgrades. We handle all paperwork, coordinate energy audits, and ensure your installation qualifies for maximum rebates. Combined with our 0% financing options, proper attic insulation becomes surprisingly affordable with typical payback in just 2-4 years through energy savings.
Serving Burlington, Hamilton, Oakville, Mississauga, Kitchener-Waterloo, and communities throughout Southwestern Ontario, Custom Contracting is your local insulation expert. Contact us today for a free energy assessment with thermal imaging to see exactly where your home is losing energy. Discover why thousands of Ontario homeowners trust us to improve their home's comfort and reduce their energy costs—backed by our lifetime workmanship warranty.
45 Worthington Dr Unit H
Brantford, ON N3T 5M1
Free energy assessments
Thermal imaging included
Up to $1,000 rebates
Don't miss this 60% OFF offer! Contact us today.
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45 Worthington Dr Unit H
Brantford, ON N3T 5M1
✉️ Email Us
infor@customcontracting.ca