Checking Insulation and Weather Stripping

Most Texas landlords don’t think about insulation until they’re standing in a “heated” room that still feels like a barn. Tenants complain the place is drafty, you blame the HVAC, and the truth is… a lot of your paid-for heat is sneaking out through gaps and thin spots.

Good news: you don’t have to be a contractor to do a solid insulation and weather stripping check. You just need a flashlight, a few minutes, and a willingness to notice what most people ignore.

Here’s how to walk a property like someone who actually wants to keep conditioned air inside the building.

1. Start with the “Human Test”: How Does It Feel?

Before you touch anything, just walk the place and pay attention.

Ask yourself:

• Does one room feel colder than the others?
• Are floors near exterior walls noticeably colder?
• Do you feel a draft standing by a window or door?

If you can feel it, your tenants can definitely feel it—and you’ve got a clue where to focus.

2. Doors: The Gap You Can Literally See

Exterior doors are often the biggest offenders. Do a quick door audit:

• Stand inside during the day and look for daylight around the edges.
• Slide your hand around the perimeter while the heat is running. Can you feel cold air?
• Look at the bottom sweep—is it missing, torn, or not actually touching the threshold?

Common fixes:

• Replace worn weather stripping on the sides and top.
• Install or adjust the door sweep so it actually seals without dragging like a boat anchor.
• Check that the strike plate and hinges are tight so the door isn’t sitting crooked in the frame.

None of this is glamorous work, but closing a 1/4″ gap under a door can make a huge difference in comfort—and in how hard your system has to run.

3. Windows: Not Just Glass, But Frames and Locks

You don’t need brand-new windows to get decent performance. You do need them to close properly.

On each window:

• Check that it fully closes and locks. A locked window typically seals tighter.
• Feel around the edges for air movement.
• Look at the caulking where the frame meets the wall—is it cracked, missing, or crumbling?

If you’ve got older single-pane windows, you’re not going to make them perform like modern units with a magic trick. But you can:

• Replace tired caulk around the exterior frame.
• Use weather stripping on movable sashes to reduce rattling and drafts.
• Make sure windows that should open/close actually do, instead of being painted or swollen shut.

Tenants will always complain about “the AC” or “the heater” when they feel uncomfortable. Half the time, it’s the windows whispering, “We’re not really closed.”

4. Attic Insulation: The Heat Highway Above Their Heads

If you can safely access the attic, this is where your inspection pays off.

What to look for:

• Even coverage of insulation. You shouldn’t see lots of bare spots or thin areas where you can easily see joists.
• Areas where insulation has been kicked aside near attic access, around HVAC equipment, or along pathways.
• Any obvious air gaps—daylight coming in, gaps around plumbing stacks, big openings around light fixtures or chases.

You don’t need to calculate R-values on the spot. Just ask:

“Does this look like a soft, continuous blanket—or like somebody pulled half of it up and left?”

If it’s patchy and low, that’s money leaving through the roof. Adding insulation is one of those boring upgrades that quietly improves comfort, protects your HVAC, and can help with utility bills.

5. Weird Places Where Air Sneaks In

Beyond the usual suspects, check:

• Attic hatches
  • Is there any insulation attached to the back of the hatch?
  • Does it sit snugly, or is it basically a big, drafty hole?
• Outlets and switches on exterior walls
  • Feel for cold air coming through.
  • Insulating gaskets are cheap and help more than you’d think.
• Plumbing and cable penetrations
  • Look under sinks, in utility rooms, and around hose bibs.
  • Big gaps where pipes or cables enter the house can let in a surprising amount of cold air.

None of these fixes turn a bad shell into a high-performance building, but stacking small improvements really does add up.

6. Talk to Your Tenants About What You’re Doing

While you’re on site, let tenants know:

• You’re checking for drafts and insulation issues.
• You care about comfort and avoiding crazy utility bills.

Ask:

• “Any spots that feel particularly drafty or hard to heat?”
• “Any doors or windows you have to fight with?”

People are usually happy to tell you where they’re uncomfortable. That’s free data—and it makes you look like a landlord who actually gives a rip.

7. Turn Observations Into a Short Action List

When you’re done, don’t overcomplicate it. Make three buckets:

• Fix now – Big door gaps, missing sweeps, obvious air leaks, safety issues.
• Schedule soon – Attic insulation top-up, window caulking, weather stripping upgrades.
• Plan later – Major window replacements or larger efficiency projects.

You don’t have to do everything at once. But if you do nothing, your HVAC will keep working harder than it has to, and tenants will keep thinking the “system is bad.”

Bottom line: Checking insulation and weather stripping isn’t glamorous, but it’s one of the most cost-effective ways to improve comfort, protect your systems, and keep tenants from feeling like they’re living in a drafty barn every time a cold front blows through Texas.