Thermal Imaging Inspections: What a FLIR Camera Reveals in Your Home

What thermal imaging actually is

A FLIR (forward-looking infrared) camera detects surface temperature differences and renders them as a color map. Cold spots show up blue or purple; hot spots show red, orange, and yellow. Because insulation gaps, air leaks, and moisture all change surface temperatures, the camera reveals problems that are completely invisible to the naked eye — and invisible to a visual inspection.

It's the single most useful diagnostic tool in residential insulation work. Every Cardinal inspection includes one, free.

What we find in a typical Boca Raton home

Missing or compressed insulation

The #1 finding. A batt that's shifted, compressed, or was never installed in a section of attic shows up as a clear hot patch on the ceiling below. We've found entire rooms with zero insulation above them in homes the owner thought were fully insulated.

Air leaks around penetrations

Recessed lights, plumbing stacks, the attic hatch, duct boots — every one of these is a hole in your ceiling. On a FLIR scan they glow bright: hot attic air is pouring through them. Sealing these is often worth more R-value than adding insulation.

Ductwork problems

A disconnected or leaky duct joint shows up as a hot (or cold) plume in the scan. We find leaky ducts in roughly 1 in 3 homes we inspect — and the owner had no idea their AC was cooling the attic.

Moisture intrusion

Wet insulation and wet building materials have a different thermal signature than dry ones. The camera often catches a slow roof leak or a plumbing leak before it's visible as a stain on the ceiling. Catching it early saves thousands in drywall and mold remediation.

Radiant heat patterns

On a sunny afternoon, the scan shows exactly where radiant heat is entering the home — usually the attic roof deck and west-facing walls. This tells us precisely where a radiant barrier will have the biggest impact.

Why we do it before quoting

A visual attic inspection tells you what's up there. A FLIR scan tells you how it's actually performing. The difference matters: we routinely find homes with "plenty of insulation" that are bleeding heat through air leaks, and homes with "thin insulation" that are actually fine except for one room.

Quoting from a FLIR scan means we quote what you actually need — not a blanket number. Sometimes that's a full retrofit. Sometimes it's sealing one room and adding a radiant barrier. You get the honest answer either way.

What the inspection includes

• Full attic and ceiling-plane thermal scan
• Ductwork thermal check
• Exterior wall scan (west-facing focus)
• Moisture readings in suspect areas
• A printed report with annotated thermal images
• Itemized quote based on actual findings

It takes about 45 minutes and it's the most useful hour you'll spend on your home this year. Book one — even if you never hire us, the report is yours to keep and use with any contractor.