Quick answer: Much of Vaughan was built up from the 1970s onward, and many larger homes have both an open attic and vaulted or cathedral ceilings. Topping up the main attic to at least R-50 can qualify for up to $1,250 back through the Home Renovation Savings Program, and sloped ceilings have their own tiers of up to $750. Pro Home Insulation assesses both and quotes each clearly.
Updated November 2026
On this page
- Six attic upgrades that matter most in Vaughan homes
- How to check a home with more than one ceiling type
- Rebate tiers for Vaughan homes
- Facts that apply to Vaughan homes
- Open attic vs vaulted ceiling: what changes?
- How we handle a Vaughan attic project
- Vaughan attic checklist
- Example project (illustrative)
- Neighbourhoods we serve in Vaughan
- Timing planner
- Frequently asked questions
- Get a free attic assessment
Six attic upgrades that matter most in Vaughan homes
- Topping up the main attic. This is usually the biggest, simplest gain. Older Thornhill and Woodbridge homes may have decades-old insulation that has settled.
- Insulating vaulted and cathedral ceilings. Many 1990s and 2000s homes in Maple, Woodbridge and Vellore Village have vaulted family rooms or foyers with little room for insulation.
- Sealing pot lights. Larger homes often have many recessed lights in the top-floor ceiling. Each one can leak warm air into the attic.
- Fixing the attic over the garage. Bedrooms above attached garages are a common cold spot.
- Clearing blocked soffits. Baffles keep insulation from blocking the vents at the eaves, which helps prevent moisture.
- Sealing the hatch. An unsealed attic hatch in a closet or hallway is a small spot that leaks a lot of air.
How to check a home with more than one ceiling type
Answer first: check the open attic and the vaulted areas separately, because they use different rebate tiers.
- In the open attic, measure insulation depth in several spots and note the type.
- For vaulted ceilings, you usually cannot see inside. Look for cold patches, frost lines on the roof in winter, or summer heat in that room.
- Note the location of every hatch, including any over the garage.
Our guide on how to check attic insulation R-value explains measuring the open attic.
Rebate tiers for Vaughan homes
The standalone attic path pays 50% of the after-tax cost, up to these caps. Amounts can change; see current rebates.
| Ceiling type | Before | Target | Maximum rebate |
|---|---|---|---|
| Open attic | R-12 or less | R-50 | $1,250 |
| Open attic | Above R-12 to R-25 | R-50 | $1,000 |
| Open attic | Above R-25 to R-35 | R-50 | $800 |
| Cathedral or flat roof | R-25 or less | R-28 | $750 |
| Cathedral or flat roof | R-12 or less | R-20 | $650 |
You claim one attic rebate. Ask us which part of your home is the better fit. Full rules are on our Ontario attic insulation rebate page.
Facts that apply to Vaughan homes
- The Ontario Building Code (SB-12) targets about R-60 for ceilings with attic space in new homes (Ontario Building Code).
- Air leakage is about 20–30% of heat lost from an older home (Natural Resources Canada).
- Windows, doors and skylights can account for up to 35% of heat loss (Natural Resources Canada).
- The Home Renovation Savings Program is backed by the Government of Ontario and run by Enbridge Gas and Save on Energy (Home Renovation Savings Program).
Open attic vs vaulted ceiling: what changes?
| Open attic | Vaulted or cathedral ceiling | |
|---|---|---|
| Access | Through a hatch | Usually no access from above |
| Common method | Blown cellulose or fiberglass | Dense-pack or spray foam |
| Rebate target | R-50 | R-28 or R-20 |
| Maximum rebate | Up to $1,250 | Up to $750 |
| Disruption | Low | Can involve small access holes |
For sloped ceilings, see dense-pack wall and ceiling insulation and spray foam insulation.
How we handle a Vaughan attic project
- Assess both ceiling types. We measure the open attic and check vaulted areas.
- Recommend a plan. We explain which area gives the most benefit and how it fits the rebate tiers.
- Air seal. We seal pot lights, the hatch and top plates.
- Insulate. We blow in insulation to R-50 or dense-pack sloped ceilings to the target.
- Provide documents. You get what you need to file the rebate.
Vaughan attic checklist
- Every hatch is clear, including any over the garage
- I know which rooms have vaulted or cathedral ceilings
- I have counted the pot lights in top-floor ceilings
- Bathroom fans vent outside
- I own the home and heat with an eligible fuel
- I have not claimed an attic rebate on this home before
Example project (illustrative)
example — not a specific customer.
A 1990s detached home in Maple has a vaulted family room with about R-14 in the sloped ceiling. It is dense-packed to R-28.
- After-tax insulation cost: $1,800
- 50% of cost: $1,800 × 0.5 = $900
- Tier cap (cathedral, R-25 or less → R-28): $750
- Rebate: $750 (capped)
- Net cost: $1,800 − $750 = $1,050
Heat flow through the insulation layer (simplified) drops by about 50% (1 − 14/28).
Neighbourhoods we serve in Vaughan
We work across Vaughan, including Woodbridge, Sonoma Heights, Vellore Village, Kleinburg, Maple, Patterson, Carrville, Thornhill, Thornhill Woods, Concord and Elder Mills. We also serve nearby North York, Richmond Hill and Brampton.
Timing planner
Use this to plan your project around the season and the program.
| Question | Why it matters |
|---|---|
| Is the program still open? | It is currently scheduled to run until March 31, 2027, first-come, first-served |
| Is it a very hot summer day? | Attics get hot, so work is often scheduled early in the day |
| Is there frost or ice in the attic? | Moisture should be dealt with before insulating |
| Are you renovating the top floor soon? | Do pot lights and wiring first, then insulate |
| Are you planning two or more upgrades? | The bundle path may suit you better |
Frequently asked questions
Can I claim a rebate for both my attic and my vaulted ceiling?
You claim one standalone attic rebate. We will help you work out which area to target, based on your measured R-values and the tier caps.
Are pot lights a problem for attic insulation?
Many older pot lights leak air and need to be sealed or covered properly before insulation goes over them. We check them during the assessment.
Is my 2000s home already well insulated?
Not always. Homes built to the code of their day may be below R-50. Measuring is how you find your tier.
What if I have old vermiculite in an older Thornhill home?
Do not disturb it. Have it tested by a qualified professional first. See our vermiculite and asbestos removal service.
Do I need an energy assessment?
No, not for the standalone attic path. The bundle path needs pre- and post-work assessments and two or more upgrades.
How long does the rebate take?
Rebate cheques typically arrive within a few months after the submission is approved.
Get a free attic assessment
Pro Home Insulation will assess your open attic and any vaulted ceilings in your Vaughan home and explain your options. Call (647) 250-0606 or Book online.