Markham (Cornell): a newer home with three inches of insulation left at the eaves

1The Problem

Builder-minimum insulation doesn’t fail loudly. It settles quietly, year after year, until the bedrooms over the garage won’t stay warm and the furnace stops taking breaks. At the eaves — where wind washes over the insulation every day — this attic was down to about 3 inches.

2What the Inspection Found

Beyond the thin coverage, the inspection flagged what we find in almost every Cornell-era home: pot lights and ceiling penetrations that were never sealed, leaking warm house air straight into the attic. Air sealing had to come before a single bag of insulation went in — otherwise the new material just filters the leak instead of stopping it.

3How We Fixed It

A textbook seal-then-blow visit:

• Spray-foam sealed the ceiling penetrations, pot lights and top plates
• Protected the soffit intake airflow with baffles
• Blew fresh fiberglass across all 1,000 sq ft up to R-60
• Sealed and insulated the attic hatch

4The Result

From 3 inches at the eaves to a sealed, R-60 attic in a single visit. Our office is on John Street in Markham — Cornell jobs like this one are about as local as our work gets. 10-year workmanship warranty.