A wall cavity is harder to empty than an attic, which is why it is only emptied when it must be.
Water damage, rodent contamination, or old loose fill that has settled to the bottom third of the bay and left the top two thirds empty. That last one is common in Toronto houses insulated in the 1970s, and it is why a wall can feel cold at head height and fine at the skirting.
Removal means opening the cavity — from outside through the sheathing where the cladding is coming off anyway, or from inside through the drywall. It is a bigger job than an attic removal and we quote it honestly as one.
If the problem is settled loose fill and the cavity is otherwise sound, topping up through injection is usually cheaper and performs almost as well. We will measure with a borescope and tell you which you are looking at rather than defaulting to the bigger job.
Largely, yes. A borescope through a small hole shows the material, the fill level and any water staining.
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You get the depth, the tier, the dollar figure and the photographs, whether or not you go ahead with us.
