Is $4,000 to add attic insulation to meet R51 standards a fair price?
Project Details
After a recent blower door test, I learned that my attic was not well isolated. My house is old, built around 1970, and the attic insulation has never been changed. There's no mold issue, but I've noticed signs of humidity in some parts. My roof gets very hot during the summer, reaching up to 33 Celsius even with window shades. In winter, I experience ice dams, which is common where I live in Quebec, but I try to remove the accumulation whenever possible. I'm trying to understand what it means when they say "It will be difficult or impossible to fix the ice dams if the rest of the roof assembly is covered and unvented. You could bring that attic into the conditioned space with closed cell spray foam around the exterior and remove the existing insulation. Otherwise, venting that space is going to be difficult. Looks like the wall insulation is vapor barrier on the wrong side."
Quote Details
This option focuses on upgrading the existing attic insulation to meet current R51 standards and improving ventilation and sealing. It includes: - Addition of blown fiberglass (17 inches total) to meet current R51 standards - Installation of sealing joints for access hatches - Ensuring soffits are properly cleared - Addition of deflectors and cardboard in front of the soffits for ventilation - Decontamination of the framework with encapsulant and fungicidal product - Insulation of access hatches - Installation of leveling guides in the attic - Protection of the premises during the work - Photos taken before, during, and after the work - Provision of service truck and tools - Cleanup of premises after work
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More Details
Category
Insulation
Price
$4,000
Quote Date
October 2, 2025
Year Built
1970
Insulation Type
Blown In
R Value
R51
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