Two Homes, Same Street, Same Price - One Stays Cool Every July

Curb appeal shows a buyer a home’s charm, while whether it stays comfortable in August comes down to factors beneath the surface. According to Kat Cahill, Growth Marketing Director at Pearl, two homes that look nearly identical from the street can deliver very different living experiences once temperatures climb or drop. The factors that determine comfort are largely invisible during a standard showing. Pearl SCORE™ is the national standard for how homebuyers evaluate home performance.

Many buyers only learn how comfortable a home truly is after they move in. The systems that keep indoor temperatures consistent rarely come up during the purchase process. Sellers may not think to share the information, agents are seldom trained to ask for it, and the 10 to 30 minutes a buyer spends inside during a tour offers only a glimpse of how that home will feel in the middle of summer or winter. Understanding these systems is central to real estate home performance.

The Systems That Shape Real Estate Home Performance

Temperature comfort in residential homes typically traces back to how well the home contains and distributes conditioned air, according to Cahill. The causes are identifiable, and buyers can learn to look for them even though they rarely come up during a showing.

Attic insulation is one of the most influential factors. “If the rooms upstairs are very hot, that typically means there isn’t enough attic insulation,” Cahill says. Adding insulation to an attic ceiling helps keep heat out of the living space below, making upper floors easier to cool and letting the HVAC system work more efficiently.

Window and door condition is another major factor. When windows, doors, and other openings aren’t well sealed, conditioned air escapes and outside air finds its way in. The clues can show up in places buyers would never think to check. “If you put your hand up to an outlet in the middle of the winter, sometimes you can literally feel a breeze,” Cahill says. “The house is not airtight.” Sealing those gaps helps a home hold on to the comfort it produces.

Ductwork condition matters as well. Cahill describes a sealing process in which a pressurized sealant is blown through the entire duct system to close leaks from the inside. “You’re not paying to put warm and cool air in your floorboards,” she says. “It’s actually making it to the vent where it’s supposed to go.” Well-sealed ductwork helps a functioning HVAC system deliver conditioned air to the rooms that need it most.

Temperature is only part of the picture. Comfort is a broad category that also covers how well a home controls humidity, how much outdoor noise reaches the living space, and the quality of the air and water inside the home. Each of these shapes how a home feels day to day, and each is just as hard to judge during a short tour.

What Buyers Should Ask Before Making an Offer

Cahill’s position is that comfort is a researchable attribute buyers can explore ahead of time rather than after move-in. Buyers who want to understand a home’s comfort profile before making an offer can ask sellers specific questions about the home’s systems. Many of those questions concern the building envelope, which is the shell of insulation, windows, doors, and seals that separates conditioned interior air from the outside. Others concern how air is distributed through the home.

Those questions include: Has the attic insulation been updated, and to what level? When were the windows and doors last replaced? Has the home been air sealed, including around outlets and other openings? Has the ductwork been tested or sealed? Buyers can also ask about ventilation, humidity control, and any water filtration or air quality systems in the home.

The opportunity, Cahill says, is that a little curiosity goes a long way. Information about insulation upgrades or ductwork sealing may not appear in the MLS listing. It often lives in a contractor invoice from years ago or in the seller’s own records. With a structured way to surface that information, it can become part of the transaction and inform the total cost of homeownership.

“Typically, it comes down to how sealed up your home is,” Cahill says. “Is air able to get in or out? Stop that, and then make sure the air you’re paying to condition is actually getting where it needs to go.”

For buyers and agents, this means comfort belongs on the due diligence checklist alongside price, location, and square footage. In a market where buyers have more time to evaluate homes, a property’s year-round livability is worth investigating before an offer, well ahead of the home inspection.

Surfacing Real Estate Home Performance Data Before the Tour

Pearl SCORE™ is designed, in part, to make comfort-related information visible before a buyer ever visits a property. Cahill says Pearl evaluates homes across five pillars (Safety, Comfort, Operations, Resilience, and Energy) by drawing on licensed public data and information provided directly by homeowners through the Pearl app.

For buyers seriously considering a home, Pearl offers detailed Pearl SCORE™ Reports that show the specific features affecting comfort. When a seller hasn’t claimed their home in the Pearl app, the report provides questions buyers or their agents can bring to the seller or listing agent to learn whether those features are present.

Cahill frames this as filling a gap in the current buying process. Most of the features that shape day-to-day comfort have no standard field in MLS listings. That includes insulation levels, air sealing, ductwork condition, window efficiency, humidity control, noise reduction, and indoor air and water quality. Without a structured way to document them, there is no reliable way for that information to reach buyers before the transaction is underway.

About Pearl
Founded in 2013, Pearl is a ratings and standards company building the national standard for home performance. Pearl SCORE™ rates every single-family home in the U.S. across five key pillars — Safety, Comfort, Operations, Resilience, and Energy — so homebuyers, homeowners, and real estate professionals can understand how a home performs in daily life. As a Certified B Corporation, we’re accountable not only to our shareholders, but also to the homeowners and communities we serve. For more information, visit pearlscore.com.

This article is based on information provided by the expert source cited above. It is intended for general informational purposes only and does not constitute legal, financial, or real estate advice. Readers should conduct their own research and consult qualified professionals before making any real estate or financial decisions.