Services
What we run on the plateau
01
Air sealing — from $890
Top plates, chases, the chimney gap, rim joists, the holes the infrared camera finds in the first twenty minutes. Sealed and re-tested with the blower door the same visit — most plateau houses move 25% of their CFM50 on this line alone.
02
Dense-pack walls — $4.75 / sq ft
Cellulose at 3.5 lb/ft³ through a 2-inch hole per bay, plugged and patched before we leave the wall. The wind that comes off the plateau stops coming through the siding, which is the point.
03
Attic to R-60 — $2.40–3.10 / sq ft
Dams, baffles, hatch seal, then cellulose blown to a settled R-60 over whatever the builder left. R-30 with wind-washing through the eaves performs like R-22, and the audit will show you exactly that.
04
Ice-dam remedy — from $1,450
Dams are a heat-leak diagnosis, not a roofing problem: warm air melting snow at the eaves, refreezing at the cold edge. We seal the top plates, blow the attic and set the baffles — and the dams stop forming on the houses we have done.
How Snowline runs
Two rules on the plateau
Rule one: nothing gets insulated before it gets sealed — thickness over holes is money over a leak. Rule two: the envelope gets measured, twice, in CFM50, and both numbers go on your paperwork. Winter up here is a five-month load test; we would rather your house pass it on instrumentation than on faith.
The cold-weather clause
We blow attics down to 0°F and dense-pack walls in any temperature the van starts in. If the forecast closes us out, the day moves and the price does not — the quoted number waits for the weather, not the other way round.
The plateau, in figures
Plateau households
Winter, survived warmly
Every February the north slope grew ice shelving you could see from the road, and every March we paid a roofer. Snowline sealed the top plates and blew R-60 with proper baffles, and for two winters the roof has shed snow like the neighbours' new build.
Our 1988 A-frame tested 3,600 CFM50 in October and 1,700 by Remembrance Day — same crew, one visit for the seal, two for the walls. The propane truck used to come monthly; this winter it came four times, total.
The upstairs bedroom was a rumor — cold enough that the kids fought over the other one. Dense-pack in the knee walls and R-60 over the ceiling, and now it is the warm room in the house. The blower-door sheet is on the fridge.
Before you call
Fair questions
The five we get once the frost lands. If yours is not here, the number at the bottom of the page answers all winter, seven to five.
Can you actually install in winter?
Yes — cellulose blows in cold, and the sealing work happens inside. We hold the attic blow above 0°F for the material's sake, not the crew's; below that the day moves and the quote holds. Plenty of plateau jobs are done in January because that is when the house is honest about its leaks.
Why do I get ice dams if my attic is insulated?
Because insulation is not the same as air-tightness. Warm house air leaks through top plates and gaps, melts the snow from underneath, and the melt refreezes at the cold eave. The fix is seal-first-then-thick — the exact order we work in — plus baffles so the soffits vent the deck cold.
Will sealing the house starve the furnace?
We worst-case test every combustion appliance after sealing, and if the house needs make-up air it goes in the scope. A tight envelope with planned ventilation beats a leaky one with accidental ventilation every day of the week.
How much does the audit cost?
$195 — blower door, infrared, written scope — and it is credited in full against any work booked within the year. Half the houses on the plateau book the audit for the ice-dam question alone and leave with a scope they can act on at their own pace.
What is the payback up here?
With five months of heating, the median plateau house pays the work back in about four seasons at current propane and oil prices — faster where the utility rebate applies, which we file for you. The audit puts your house's own number on it before you commit.
Winter audits run valley-wide, weather permitting · (555) 019-8873 · hello@snowlinethermal.example
Get the winter audit
Tell us the town and what January does to the house — dams, drafts, or a propane bill you photograph in disbelief. The audit is $195, credited to any work, and the second blower-door reading is printed on the invoice when we finish. hello@snowlinethermal.example