Johns Manville Home Energy Audit in Chicago: What to Know First
An independent Johns Manville home energy audit in Chicago typically runs between $295 and $495 for a blower-door test plus thermal imaging, and we complete most audits in two to three hours on site. You’ll leave with a printed ACH50 reading, a photo log of every leak we found, and a written scope for what should happen next – whether that’s air sealing, insulation replacement, or both. This page is for Chicago homeowners who have Johns Manville insulation in their attic, walls, or rim joists and want to know whether it’s actually performing. Call (218) 261-7714 to schedule an audit, or read on to understand what we look for and what it costs.
How Johns Manville Products Fail - and How We Fix Them
- JM ComfortTherm batts compressed by foot traffic: ComfortTherm’s poly-encapsulated fiberglass batts get walked on in attics and crawl spaces, and once compressed from R-30 to effectively R-12 in the traffic paths, the air sealing you paid for stops mattering because the thermal barrier is gone. We document the compression zones with thermal imaging and recommend either fluffing (where the encapsulation is intact) or replacement (where it’s been flattened for years).
- Attic Protector blown fiberglass settled below the top plates: Attic Protector loose-fill settles over time in Chicago’s freeze-thaw cycles, and when it drops below the height of the exterior wall top plates, you get a continuous thermal bypass at every exterior wall. We measure settled depth versus the labeled bag coverage, then calculate what the R-value actually is now – not what it was when the bags went in.
- Unsealed rim joists behind Johns Manville batts: We regularly open rim joist cavities in Chicago bungalows and find the original Johns Manville batt still sitting in the cavity, doing almost nothing because the cavity was never air sealed from the basement side. The fiberglass acts as a filter for air moving through the cavity, not a barrier. Our fix is to remove the batt, foam-seal the rim joist, and reinstall the batt or upgrade it.
- Vapor-retarder-facing installed backward on JM kraft-faced batts: The kraft paper facing on Johns Manville kraft-faced insulation is a vapor retarder, and when it’s installed facing the wrong direction in Chicago’s climate zone 5, trapped moisture condenses inside the wall cavity and degrades the product over a decade. A thermal imaging inspection will show the cold spots and moisture shadows that result. We flag this during every audit and correct it if we’re doing the remediation work.
- Spider blown-in fiberglass bridging over unsealed can lights: Houses with Johns Manville Spider (blown fiberglass in wall cavities) and non-IC-rated can lights create a fire hazard that many owners never spot because the insulation hides the fixture. We check every can light during the audit, document clearance, and recommend IC-rated airtight housings before any insulation is re-blown in that area.
Our Johns Manville Home Energy Audit Process
- 1
You call (218) 261-7714 and we schedule the audit. A live person answers, you get a firm arrival window, and we send a text when the technician is on the way.
- 2
We install the blower door and run the test. The blower-door test measures your home’s air leakage in CFM50 – how many cubic feet of air escape per minute when the house is depressurized to 50 pascals. We write the number down in front of you.
- 3
We walk the house with the thermal camera. We trace every wall, ceiling, and rim joist for temperature anomalies that indicate missing, settled, or bypassed Johns Manville insulation.
- 4
We map and document. Every leak, compression zone, and thermal bridge gets photographed and marked on a written scope. You see what we see, as we see it.
- 5
We run a duct leakage test if your HVAC is in unconditioned space. Leaky ducts can account for 20 to 30 percent of conditioned air loss in Chicago attics and crawl spaces. We quantify it.
- 6
We hand you the printed report. Pre-audit ACH50, thermal images, a written scope with line-item pricing, and the recommended order of work. That’s what leaving looks like.
What Johns Manville Home Energy Audit Costs in Chicago
A standalone home energy audit with a blower-door test and thermal imaging runs $295 to $495 in Chicago, depending on home size and whether you want a duct leakage test included. If we do the remediation work – air sealing, insulation replacement, or both – we credit the audit fee toward the job. The biggest cost variable on Johns Manville-specific work is whether your existing insulation can be re-used or needs to be pulled and replaced due to settling, moisture, or compression. You’ll get a written price before any work starts, always. Call (218) 261-7714 and we’ll tell you over the phone what your audit will cost before we step foot inside.
Why Chicago Homeowners Call Topside Attic Insulation for Johns Manville Work
We’re the contractor in Chicago that prints the blower-door number before and after every job, so you can see the air sealing result in one figure. Under the Haven Standard since 2016, every one of our 9,000+ homes has received a written price before work started and a documented photo record when the crew left. Our technicians know Johns Manville products well enough to tell you when the batts are fine and the air sealing is the problem – and when the batts themselves have failed. And we’re not locked into one manufacturer; our trucks carry Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, and others, so if your Johns Manville insulation is beyond saving or you want to add Reflectix radiant barrier in a hot Chicago attic, we quote what’s right for the house, not what’s in the warehouse. If it’s not done right, our 365-Day Done Right Promise means we make it right.
FAQs
No. A diagnostic audit – blower-door testing, thermal imaging, and visual inspection – does not alter or affect your Johns Manville product warranty in any way. As an independent Johns Manville service provider, we do not modify the product during an audit. If remediation work is needed, we document everything and provide a written scope that preserves any warranty-eligible claims.
The three most common signs in Chicago are: rooms that stay cold in winter despite the heat running, high heating bills compared to similar homes, and visible settling in the attic where insulation has dropped below the top plates. A blower-door test plus thermal imaging walk-through gives you hard numbers, not guesses. Call (218) 261-7714 for an audit – we’ll tell you the ACH50 and show you the thermal images before we recommend any work.
It depends on what the audit finds. Compressed ComfortTherm batts that are still intact can often be fluffed and re-laid for a few hundred dollars, while settled Attic Protector loose-fill is usually cheaper to top off than to remove unless moisture or pest contamination is present. We’ll show you both numbers in writing and recommend the cheaper long-term option, not the one that generates a bigger invoice. Estimates are free.
We can often schedule same-week in Chicago, and our phones are answered by a live person 24/7 – no voicemail loops. Call (218) 261-7714 now and we’ll give you the next available window and the exact audit price for your home size.
No. We audit and work with all major insulation brands including Owens Corning, Knauf, Rockwool, CertainTeed, and Reflectix. The audit process is identical; the materials, failure modes, and remediation approach shift based on what’s in your home.
Written by Wes Okafor, Owner & Lead Building Envelope Technician, Topside Attic Insulation at Topside Attic Insulation, serving Chicago and nearby areas.