What an Attic Energy Audit Checks (DFW Homes)

Why Your Attic Is the First Thing I Check

My name's Neal. I run DFW Attic Insulation. When a homeowner calls me about high bills or uneven temperatures, I start in the attic every time. The Pacific Northwest National Laboratory says the attic is the number one source of energy loss in a house. That's not a guess. That's measured data.

Most DFW homes have never had an energy audit. Builders in the 90s and 2000s didn't prioritize air sealing. They slapped in R-19 batts and called it done. That insulation settled, shifted, and got compressed by storage boxes. Now your AC runs twice as hard.

An attic energy audit isn't a walkthrough. It's a diagnostic process. I use a blower door, an infrared camera, and a pressure gauge. I look for three things: air leaks, insulation gaps, and ventilation failures. If any of those are off, your energy bill goes up.

Here's the number that matters: ENERGY STAR says home energy checkups can reduce energy bills by 20% or more. That's not a promise. That's the average from thousands of homes. Your savings depend on how bad your attic is. Most DFW attics are bad enough to see that 20% drop.

I don't sell audits to people who just need a filter change. I sell them to homeowners who want to stop throwing money at the power company. The IECC 2021 sets R-38 as the minimum attic insulation for Climate Zone 3 (DFW area), with the International Residential Code (IRC) Section R806 requiring balanced ventilation at 1:300 ratio.

What the Blower Door Test Tells Me

The blower door is the most important tool in an attic energy audit. It mounts in your front door frame and pulls air out of the house. That depressurizes the home. Then I walk through with a smoke pencil or an infrared camera to find where outside air is rushing in.

In DFW attics, the biggest leaks are almost always the same places. The attic hatch. The top plates of interior walls. Recessed can lights. The chase where the furnace flue goes up. Those gaps can add up to a hole the size of a basketball.

When I find those leaks, I mark them with tape or chalk. Then I calculate the total leakage in cubic feet per minute at 50 pascals, or CFM50. A tight home might test at 1,500 CFM50. A leaky DFW home can hit 4,000 or more. That's like leaving a window open year-round.

I don't recommend an audit if you're selling your house next month. The fixes pay off over time, not overnight. But if you plan to stay in your home for two more summers, the audit pays for itself in lower bills.

Complete attic retrofit combines air sealing, new insulation, and ventilation in one pass. That's the most cost-effective way to fix what the blower door finds.

Infrared Camera Scans for Insulation Gaps

The blower door finds the leaks. The infrared camera finds the missing insulation. I use a FLIR camera that reads surface temperatures. When the attic is depressurized, cold air from outside pulls through gaps in the insulation. Those gaps show up as cold spots on the camera.

In DFW, I see the same patterns. Insulation that's been pushed aside by HVAC contractors. Batts that were installed with gaps at the edges. Blown-in cellulose that settled from R-38 down to R-19. The camera doesn't lie. It shows exactly where the thermal barrier is broken.

I also check for thermal bypasses. Those are hidden paths where air moves around the insulation. The most common one in DFW is the dropped soffit above kitchen cabinets. Builders frame that space but rarely insulate it. The infrared camera catches it every time.

If your insulation looks even and thick from the attic access, you still might have gaps. The camera sees what your eyes can't. That's why I don't quote a job without scanning first. It's the difference between guessing and knowing.

[Home energy audit]( Angi reports that professional attic air sealing costs between $300 and $4,000 depending on home size and leak severity. HomeAdvisor's 2026 data shows the national average for air sealing is around $1,500, with most projects falling between $700 and $2,500. /services/home-energy-audit/) is the first step. The camera scan is included in every audit I do.

Ventilation Check: Intake and Exhaust Balance

Air sealing and insulation are useless if your attic can't breathe. I check ventilation on every audit. DFW attics need balanced intake at the soffits and exhaust at the ridge or gable vents. If either side is blocked, the attic traps heat and moisture.

I start by looking at the soffit vents from inside the attic. Most DFW homes have fiberglass batts stuffed into the eaves. That blocks the intake. No intake means no airflow. The ridge vent becomes decoration.

Then I check the exhaust. Ridge vents can get painted over or clogged with debris. Gable vents can be blocked by insulation. I measure the net free area of both intake and exhaust. The rule is 1 square foot of vent for every 300 square feet of attic floor. Most DFW homes don't meet that.

When ventilation is wrong, the attic gets hotter in summer and wetter in winter. That heat radiates into your living space. Your AC runs longer. Your insulation works harder but performs worse. Fixing ventilation is part of a complete attic retrofit.

I don't recommend adding more insulation if your soffits are blocked. You'll just bury the problem. Fix the airflow first.

How the Audit Pays for Itself in DFW

An attic energy audit costs between $300 and $500 in DFW. That's a fair price for two hours of diagnostic work with professional equipment. The question is whether you get that money back.

Here's the math. The average DFW home spends $2,400 a year on cooling and heating. A 20% reduction from ENERGY STAR means $480 in annual savings. The audit pays for itself in the first year. The fixes pay for themselves in the next two to three years.

Oncor and local utilities offer rebates for energy audits. Some rebates cover the full cost of the audit. Others give you a discount on the retrofit. I don't process the rebates myself, but I tell every customer to check their utility website before I start work.

If your attic is already well-insulated and sealed, I'll tell you. I've sent people away with nothing but a filter recommendation. That's rare in DFW, but it happens. The audit is worth it either way.

You don't need an audit if you're renting or moving in six months. The payback period is too long. But if you own your home and plan to stay, the audit is the cheapest bill reduction you can buy.

What Happens After the Audit

I give you a written report with photos from the infrared camera. The report shows every leak, every gap, and every ventilation problem. It also shows the current R-value of your insulation and what it should be. DFW needs R-38 in the attic. Most homes have R-19 or less.

Then I give you a prioritized list of fixes. Air sealing comes first. That stops the drafts. Then insulation replacement or addition. Then ventilation correction. I don't recommend doing them in a different order. Sealing without insulating leaves the thermal barrier weak. Insulating without sealing lets the conditioned air escape.

A complete attic retrofit does all three in one pass. That's the most efficient way. It costs more upfront but saves more over time. I quote the retrofit price based on what the audit found. No surprises.

If you only want the audit and plan to do the work yourself, I'll tell you what to buy and where to seal. I don't upsell. I just give you the facts. Most people hire me because they don't want to spend a weekend in a 140-degree attic. I don't blame them.

Call (469) 895-2695 to schedule an audit. I'll tell you if you need it. Ready to stop guessing about your attic? Call (469) 895-2695 to schedule your energy audit. I'll tell you exactly what's wrong and what it costs to fix it.

Frequently Asked Questions

Frequently Asked Questions