Cathedral Ceiling Insulation In Caledon, Ontario

Why Cathedral Ceiling Insulation Is Different

A sloped ceiling usually offers only the depth of its rafters, often 6 to 10 inches, which caps how much cathedral ceiling insulation can fit. The material therefore has to be picked for its R-value per inch.

Most of these roofs also need an air gap under the roof boards so moisture can escape. Filling that gap leads to rot and ice.

Three Ways To Add Cathedral Ceiling Insulation

Option one is dense-packed cellulose, pumped into every rafter space through holes about the size of a coin, which suits a sound ceiling with closed bays. Option two is closed-cell spray foam sprayed against the roof sheathing from below, best when the ceiling is already off. Option three is rigid foam board laid over the roof deck when the shingles are being replaced.

Knee Walls And Flat Spots Behind Cathedral Ceilings

Older homes with sloped bedrooms usually have short knee walls with small crawl spaces behind them. Those walls and the floor of each crawl space are sealed and insulated as part of the same job.

Any flat stretch of ceiling at the top of the slope is handled like a small attic and filled with blown-in cellulose insulation.

Cathedral Ceiling Insulation Price Range

Ontario prices for cathedral ceiling insulation usually sit between $3.00 and $6.50 for each square foot of sloped ceiling. Dense-packed cellulose falls near the lower figure, and spray foam or work that opens the ceiling falls near the higher one.