Attic Spray Foam Insulation In Waterloo, Ontario

Attic Spray Foam Insulation Goes On The Floor Or The Roof Deck

We handle attic spray foam insulation in one of two ways, and how you use the attic decides which. For a vented attic that holds no storage, we close every gap in the ceiling from above. Every pot light, wire hole, plumbing stack and the hatch gets sealed, and blown insulation can go on top.

If ductwork or a furnace sits up there, or you want the space for storage, we spray closed cell foam directly onto the roof sheathing from below. That pulls the whole attic into the heated envelope of the house.

Snow On The Roof Shows Where The Heat Goes

An ice dam starts with house heat melting the snow from underneath. Meltwater trickles down, freezes at the cold overhang and pushes back under the shingles. With about five feet of snow falling on Waterloo in a typical year, a leaky attic has plenty to melt.

A good look at the roof after a snowfall tells a lot. Bare patches over the bathroom or above the hall usually mark the leaks, and those spots are where attic spray foam insulation pays off fastest.

Older And Newer Attics Need Different Work

Attics in Lakeshore and Lincoln Village homes from the 1960s and 70s often have a few inches of old batts and lots of open gaps around wires. Attics in Clair Hills and Laurelwood homes are newer, but cathedral ceilings and rooms over garages still leave tight spots that batts cannot fill.

Both get attic spray foam insulation, but the plan is different. The free visit is where we sort out which method suits your roof.

What Attic Spray Foam Insulation Costs

Open cell sprayed over an attic floor comes in at $2.50 to $4.50 a square foot. Closed cell sprayed under the roof deck comes in at $3.50 to $7, with roof pitch, access and depth moving the figure.

You can read how the two foam types compare before the visit.

Attic Hatches, Pot Lights And Bath Fans Leak The Most Air

Most attic heat loss happens at a handful of holes, not across the whole ceiling. The attic hatch, recessed pot lights, bath fan housings, plumbing stacks and the top plates of interior walls all let warm, damp air rise into the attic.

Attic spray foam insulation seals each of those openings before anything else goes on. A hatch also gets a foam board lid and weatherstripping, so the easiest leak in the house stops being one.

Damp air in an attic also causes frost on the nails and roof boards in February. When it melts, it drips onto the ceiling and looks like a roof leak. Sealing the attic floor stops that cycle at the source.