Attic heat loss diagnostic
Low or Uneven Attic Insulation
What you see outside often starts inside the attic.
The short answer
Attic insulation settles, gets walked on, and gets pushed aside during other work, so coverage is often uneven rather than uniformly thin. Because performance follows the weakest area rather than the average, a few bare patches matter more than most homeowners expect. What determines the work is the measured depth and the condition of what is already there.
Heat leaves through four places.We check every one.
A cold room is the end of a path, not the start of one. The envelope has four weak points, and which one matters is decided in your attic, not on this page.
- 1Insulation depthDepth measurement at several points
- 2WalkwaysVisual survey of the attic floor
- 3Compacted areasDepth and condition assessment
- 4Discoloured areasInspection for staining and moisture
Reading the evidence
A visible symptom narrows the cause. It does not settle it on its own, which is what the quote on your own attic is for.
Joists visible above the insulation
Likely causeDepth well below target
How we confirm itDepth measurement at several points
If confirmedAttic insulation top-up
Insulation pushed aside in walkways or near the hatch
Likely causeDisturbed coverage from previous access
How we confirm itVisual survey of the attic floor
If confirmedRedistribution and top-up to target
Insulation feels dense and flat
Likely causeMaterial has compacted and lost performance
How we confirm itDepth and condition assessment
If confirmedRemoval, then new insulation to target
Dark or discoloured insulation
Likely causeAir washing through it, or past moisture
How we confirm itInspection for staining and moisture
If confirmedAir sealing, with removal if it has been wet
What this page cannot tell you
- Depth alone does not describe performance. Coverage, condition and air leakage all change the result.
- An attic with limited access or very low clearance changes what can realistically be achieved, and we say so on site.
The recommendation hierarchy
Even here, what is already up there decides the answer. This is not a matter of adding bags on top of whatever is there.
Primary solution
Attic Insulation Top-Up
Improve home comfort and energy efficiency with professional attic insulation upgrades and top-ups.
Explore this service
Conditional solution
Attic Insulation Removal
Use it: if the existing insulation is compacted, wet or contaminated, in which case it comes out first.
About this problem
Questions homeowners ask us.
Everything below is about low or uneven attic insulation. Tap one.
Eco-Therma
Usually replies the same day
How much insulation should an Ontario attic have?
Eco-Therma sets the right target for your attic from what is already there. Depth, evenness and condition all move it, so the number comes from the attic rather than from a package.
Can you just add on top of the old insulation?
Often yes, if the existing material is dry and in good condition. If it is compacted, wet or contaminated, Eco-Therma takes it out first.
Does uneven coverage really matter?
Yes. Heat takes the easiest path, so the thin areas carry more of the loss than their share of the surface.
A practical next step
Request a Remote Quote
A remote quote starts and finishes with your address and the approximate size of your attic. No attic access, no waiting on a visit.