Set your attic area and how much insulation is up there now, pick the material, and get the project priced — with air sealing first, because that is the honest order of operations. The default 1,000 square feet topping up from around R20 to R60 in blown cellulose with air sealing runs about $1,800–3,200. Attic top-ups are routinely the best energy payback in the house, and rebate programs frequently cover part — worth checking before booking.
R50–R60 is the standard target for cold-climate attics. If you can see your joists, you are likely under R20 and losing heat through the lid of the house — the exact situation where the payback on a top-up is fastest.
Insulation slows heat; it does not stop air. Warm moist air leaking through pot lights, top plates and the hatch carries heat past any R-value and can condense in the attic. Sealing those paths first ($300–700) makes the insulation actually perform — blowing over leaks is burying them.
Blown cellulose and fiberglass are close in price and performance for attic floors — cellulose settles denser, fiberglass resists moisture. Spray foam at roughly double only earns its cost where you need air sealing and insulation in one, like cathedral sections — for a flat attic floor, blown-in plus air sealing wins the value math.
Every calculator runs from one config: your name, your colours, your prices. Brand it below, open any tool from the catalogue, and finish a quote — the lead lands in the table here the moment the estimate unlocks. On your own site the widget works exactly like this.
| Captured | Name | Contact | Tool | Job value |
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| No leads yet — run any tool in the catalogue and finish the quote. | ||||
| Tenants signed | Avg. rent | Monthly | Annual |
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