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Hidden gaps in your Denison home trade your cool air for hot outdoor air all summer long. We find and seal every leak so your AC works less and your bills drop.
Hidden gaps in your Denison home trade your cool air for hot outdoor air all summer long. We find and seal every leak so your AC works less and your bills drop.
Air sealing in Denison, TX means finding and closing the hidden gaps where outside air enters your home and conditioned air escapes. Most jobs are completed in one to two days, with the majority of the work happening in your attic and crawl space.
These gaps are often invisible - behind walls, above ceilings, around light fixtures, and wherever pipes or wires pass through your framing. Together they act like leaving a window cracked open year-round. In Denison's extreme summer heat, that means a constant stream of outdoor air pouring into your living space while your AC works overtime trying to compensate. Air sealing pairs directly with attic air sealing, which targets the single highest-impact area in most Denison homes, and it works best when combined with proper insulation above.
If your Oncor bill climbs sharply each June and your habits have not changed, your home is likely forcing your AC to run almost constantly to replace air that is leaking out. That extra runtime is pure wasted energy, and it shows up on every summer bill.
Hold your hand near an electrical outlet on an exterior wall on a hot day. If you feel air moving, that outlet connects to the outside through gaps in the wall cavity. Recessed light fixtures in the ceiling are another easy check - if the fixture feels warm to the touch, hot attic air is likely flowing through it.
If one bedroom is always stuffy in summer or one corner of your living room stays drafty in winter, that unevenness points to air leakage nearby. Gaps in the ceiling above that room or around windows are often the cause - especially in Denison homes built before the 1990s.
Homes with significant air leaks pull in outside air and everything with it - dust, pollen, and the fine soil particles common in North Texas during dry and windy periods. If your HVAC filter clogs faster than it should and dust settles on furniture within days of cleaning, air leakage is a likely cause.
We start every air sealing job with a blower door test - a diagnostic step that measures how much air is leaking through your home's envelope before any sealing begins. This is not optional for us. Without that measurement, there is no way to know where to focus or whether the work actually improved anything. After the test, we walk you through what we found: which areas have the most leakage, what materials we plan to use, and why. Caulk for small cracks, spray foam for larger gaps around pipes and framing, and rigid foam board cut to fit for big openings in the attic floor - the right material for each spot, not a one-size approach.
The majority of the sealing work happens in the attic, where the gaps between your living space and the heat of your roof are most damaging. We also address gaps around outlets, window frames, door thresholds, and plumbing penetrations throughout the home. After the sealing is complete, we run a second blower door test so you can see the before-and-after numbers in writing - not just our word that the job is done. We also offer attic air sealing as a standalone service for homeowners focused specifically on the attic, and basement insulation for homes where moisture and thermal protection below grade are also a concern.
Best for homes with widespread leakage - we assess and seal every significant gap from attic to crawl space.
Best for Denison homes where the attic floor is the primary source of leakage - targets the highest-impact area first.
Denison sits in Grayson County, where summer temperatures regularly push above 100 degrees and attics can reach 150 degrees or hotter. When your attic floor has gaps and cracks, that superheated air pushes directly into your living space. Sealing the attic floor is the single highest-impact step for most Denison homeowners, and it is why air sealing and attic insulation are almost always done together in this climate. North Texas also experiences significant humidity swings between seasons, and those swings cause building materials to expand and contract, gradually opening up new cracks around window frames and wherever different materials meet.
Denison's housing stock makes this especially relevant. Homes built before the 1990s in neighborhoods throughout the city were constructed under standards that paid very little attention to air leakage. Decades of settling and renovation work have added even more gaps over time. We work with homeowners throughout the area, including in Whitesboro, TX and Gainesville, TX, where the same older housing stock and North Texas heat create identical challenges.
Tell us your home's age, size, and what you have been experiencing. We respond within one business day and come prepared for your specific situation.
We set up a blower door in your front doorway, depressurize the house, and use that pressure difference to locate every significant gap - often with an infrared camera to make leaks visible. The assessment typically takes two to three hours.
You receive a written estimate that breaks down where leaks were found, what will be sealed, and the total cost. No pressure to sign - take the time you need to feel comfortable.
We seal every gap identified during the assessment, then run a second blower door test to confirm the improvement. Before we leave, we walk you through the work and share the before-and-after numbers in writing.
Free estimate. Before-and-after blower door test included. You will see the improvement in real numbers, not just our word.
(903) 415-9273Every job includes a blower door test before the sealing begins and again after it is complete. You receive both numbers in writing. That measurement is the only honest way to confirm the work delivered results - and it is the standard we hold ourselves to.
We have been working in Denison and across Grayson County since 2016. We know which neighborhoods have the oldest housing stock, which attic configurations are most common, and what the typical leakage patterns look like in homes built here in different eras.
We follow the diagnostic approach established by the Building Performance Institute (BPI), the leading national certification body for home energy professionals. That means a systematic assessment first - not jumping straight to spraying foam without knowing where the problems actually are.
Oncor Electric Delivery serves Grayson County and has offered rebate programs for qualifying energy improvements in the Denison area. We can walk you through what programs may apply to your project and help you understand how to access available savings before work begins.
Air sealing is one of the most cost-effective improvements you can make to any Denison home. The combination of a thorough diagnostic, targeted sealing, and a confirmed post-test result is what separates a job that actually works from one that just looks finished on paper.
Focused sealing of the attic floor - the single highest-impact area for stopping heat entry in most Denison homes.
Learn MoreThermal protection for below-grade spaces where moisture and heat loss create comfort and efficiency problems.
Learn MoreBeat the summer heat - schedule your assessment before Denison temperatures peak and your cooling bills climb.