⭐⭐⭐⭐⭐ "Vent Wise upgraded our attic insulation and sealed air leaks. The house is quieter, more comfortable, and our bills dropped right away. Professional and tidy from start to finish!"
— Rebecca Doe
Attic Insulation Services
Vent Wise provides complete attic upgrades in Markham including insulation removal, air sealing, rodent barrier installation, blown-in cellulose, fiberglass batts, radiant barrier, vapor barriers, and insulation top-offs. We evaluate R-value, address ventilation, and ensure code-compliant protection against heat loss and summer heat gain.
Insulation removal • Blown-in cellulose • Fiberglass batts • Radiant barrier • Air sealing • Rodent proofing
See the Difference
Our before-and-after attic insulation projects in Markham demonstrate tighter thermal envelopes, cleaner attics, and improved ventilation. We document insulation depth, vapor barrier installation, and air sealing so you can see measurable upgrades in comfort and efficiency.
Before & after results from real jobs
Why Choose Us
We combine building science expertise with premium insulation products to help Markham homeowners lower energy bills, reduce noise, and protect against moisture. Every crew is trained on attic safety, blower door diagnostics, and proper ventilation to keep systems performing for years.
Trusted by homeowners & businesses across the Peninsula
Eco‑friendly
Same‑day service
Licensed & insured
25+ years family business
Transparent pricing
Powerful equipment
Satisfaction guarantee
Local experts
24/7 emergencies
Book Your Preferred Time
Tell us about your attic concerns—hot rooms, drafts, pests, or high bills. We schedule convenient inspections, measure insulation depth, locate air leaks, and provide detailed estimates with rebate guidance.
Pick a date and time. We'll confirm and send a technician for a free estimate.
Limited‑Time Coupons
Use these specials toward insulation removal, blown-in upgrades, radiant barrier installs, or bundled duct sealing in Markham. Ask about utility rebates and tax incentives that can stack with our promotions.
Grab a deal before the clock runs out
$30 OFF
on $299+ orders
CODE:
--:--:-- until 7 PM
$50 OFF
on $499+ orders
CODE:
--:--:-- until 7 AM
How It Works
Our attic insulation process covers inspection, removal or prep, air sealing, installation, and final verification. We photograph progress, measure R-values, and review the improvements with you before we leave.
1. Schedule
Pick your date and time.
2. Inspect
We assess insulation, ventilation & leaks.
3. Install
We air seal, install insulation & tidy up.
4. Verify
Energy check, photos & satisfaction.
Testimonials
See why homeowners in Markham recommend Vent Wise for insulation upgrades—consistent temperatures, cleaner attics, and noticeable energy savings.
Recent Work
Browse our insulation projects—from rodent cleanup and air sealing to blown-in cellulose and radiant barrier installations. Each job in Markham is documented so you can see the attention to detail.
Frequently Asked Questions
Get quick answers about insulation materials, R-values, installation timelines, and ROI. We tailor recommendations for Markham’s climate and building codes.
We install blown-in cellulose, fiberglass batt, and radiant barrier insulation depending on your home's needs and budget.
Signs include uneven temperatures, high energy bills, drafty rooms, or insulation that looks thin, damaged, or dirty.
Our team uses protective equipment and cleanup methods to ensure minimal disruption and leave your home tidy.
Yes — homeowners typically save 15–20% on energy bills thanks to reduced heating and cooling loss.
How often should attic insulation be replaced?
Most insulation lasts 15–20 years, but damaged or underperforming insulation should be upgraded sooner.
We rely on eco-friendly insulation materials, low-VOC sealants, and HEPA filtration during removal.
Most homes take 4–8 hours depending on attic size, prep work, and material type.
Yes, we are licensed and insured and can provide documentation upon request.
Yes—call early to check availability for same-day or next-day inspections.
Our Expertise
Trusted attic insulation specialists — installing blown‑in, batt, and radiant barrier solutions to reduce energy bills, improve comfort, and boost home value. Licensed, insured, and eco‑friendly.
We take pride in our insulation expertise. Our certified crews assess attic ventilation, air leakage, and existing R-values before recommending the ideal material—blown-in cellulose, fiberglass batts, spray foam, or radiant barrier. We protect your home, remove debris, and leave the space clean.
As a family-owned company, we value transparency and long-term comfort. Expect on-time arrivals, detailed reports, rebate guidance, and respectful service from start to finish.
Proudly Serving
We upgrade insulation throughout Markham and surrounding Peninsula communities, coordinating with homeowners, contractors, and HOAs for efficient scheduling and code compliance.
Markham • San Mateo • Palo Alto • Menlo Park • Mountain View • San Carlos • Belmont
Why Attic Insulation Matters
High-performing attic insulation keeps conditioned air inside, shields against outdoor heat, and protects mechanical systems from temperature swings. It’s one of the quickest ways to lower energy costs in Markham.
- Save up to 20% on heating and cooling costs with proper R-value.
- Maintain consistent indoor temperatures across every room.
- Reduce dust, allergens, and moisture from entering living spaces.
- Increase property value with modern, code-compliant insulation.
Other Cities
Attic Insulation Saylorsburg
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Saylorsburg.
Attic comfort experts ready to helpAttic Insulation Brookeville
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Brookeville.
Attic comfort experts ready to helpAttic Insulation Alpharetta
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Alpharetta.
Attic comfort experts ready to helpAttic Insulation Abingdon
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Abingdon.
Attic comfort experts ready to helpAttic Insulation Desoto
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Desoto.
Attic comfort experts ready to helpAttic Insulation Granger
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Granger.
Attic comfort experts ready to helpAttic Insulation Heber Springs
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Heber Springs.
Attic comfort experts ready to helpAttic Insulation Far Rockaway
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Far Rockaway.
Attic comfort experts ready to helpAttic Insulation Meriden
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Meriden.
Attic comfort experts ready to helpAttic Insulation Wildomar
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Wildomar.
Attic comfort experts ready to helpAttic Insulation Edgar
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Edgar.
Attic comfort experts ready to helpAttic Insulation Tobyhanna
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Tobyhanna.
Attic comfort experts ready to helpAttic Insulation Homerville
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Homerville.
Attic comfort experts ready to helpAttic Insulation Elkton
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Elkton.
Attic comfort experts ready to helpAttic Insulation Deep Ellum - Dallas
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Deep Ellum - Dallas.
Attic comfort experts ready to helpAttic Insulation Little Elm
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Little Elm.
Attic comfort experts ready to helpAttic Insulation The Dalles
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near The Dalles.
Attic comfort experts ready to helpAttic Insulation South Dartmouth
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near South Dartmouth.
Attic comfort experts ready to helpAttic Insulation Ashtabula
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Ashtabula.
Attic comfort experts ready to helpAttic Insulation Lander
Energy-efficient attic insulation, air sealing, and radiant barrier upgrades near Lander.
Attic comfort experts ready to help