Doors & Trim

Why Doors Stick in Summer (And What To Do About It)

May 2025 — Handled Home, Moon Township, PA

If you've noticed your doors suddenly getting harder to close as the weather warms up, you're not imagining it. It's one of the most common calls we get in late spring and summer, and the good news is it's usually not a serious problem. Here's what's actually happening and what you can do about it.

Why It Happens

Wood expands when it absorbs moisture. In Pittsburgh summers, humidity levels climb and wood doors — especially older interior doors and exterior doors without great sealing — soak that moisture up and swell. Even a small amount of expansion is enough to make a door that closed perfectly in February suddenly drag, rub, or refuse to latch in July.

It's not a sign something is broken. It's just wood doing what wood does.

That said, sometimes sticking is caused by something else entirely — loose hinges, a shifting door frame, or foundation settling. The fix depends on the cause, so it's worth figuring out which one you're dealing with before grabbing a tool.

Step 1 — Figure Out Where It's Sticking

Close the door slowly and watch carefully. Where does it first make contact?

Sticking at the top corner — almost always humidity and swelling
Sticking along the side near the latch — could be swelling, could be a hinge issue
Sticking at the bottom — swelling, or the door has dropped due to loose hinges
Won't latch but closes fine — the strike plate is misaligned, not a sticking problem

Mark the spot where it rubs with a light pencil line so you know exactly where to focus.

2. Loose Hinges — Check This First

Before you do anything else, open the door and check every hinge. Grab the door handle and gently lift up — if there's any movement or play, a hinge is loose.

Try this first: Tighten all the hinge screws with a screwdriver. If the screws spin without tightening, the holes are stripped. A quick fix is to remove the screw, stuff the hole with a couple of wooden toothpicks and a dab of wood glue, let it dry, then reinstall the screw. Works surprisingly well.

Call us if: The hinge itself is bent, cracked, or the door still drops after tightening everything up.

3. Swelling From Humidity — The Most Common Cause

If the hinges are tight and the door is still sticking, swelling is almost certainly the culprit.

Try this first: On a dry day, use a belt sander or hand plane on the area where the door is rubbing — just the marked spot, go slow and remove a little at a time. You want to take off just enough so the door closes cleanly with a little room to spare. Finish with a coat of paint or sealer on the sanded area to slow future moisture absorption.

If you don't have a sander, a piece of coarse sandpaper wrapped around a flat block works for minor rubbing. It takes longer but gets the job done.

Call us if: The door is sticking badly enough that you'd need to remove it to sand it properly, or if it's an exterior door where getting the seal right really matters for weatherproofing.

4. Misaligned Strike Plate — When the Door Closes But Won't Latch

If the door closes fine but the latch doesn't catch, the strike plate — the metal piece on the door frame — has shifted slightly out of alignment.

Try this first: Close the door slowly and watch where the latch hits the strike plate. If it's just barely missing, you can file the strike plate opening slightly larger with a metal file — takes about five minutes. If it's missing by more than that, loosen the strike plate screws and reposition it slightly before retightening.

Call us if: The frame itself looks cracked or warped around the strike plate, or repositioning doesn't solve it.

5. When Sticking Is a Sign of Something More Serious

Most summer door sticking is just humidity. But occasionally it signals something worth paying attention to:

Multiple doors sticking at once — if several doors throughout the house suddenly started sticking around the same time, it could indicate foundation settling or a structural shift rather than just humidity
Doors that were fine all summer but started sticking in fall — humidity usually causes sticking in warm months, not cool ones. Fall sticking can mean a frame issue
Visible gaps or cracks around the door frame — a door that's shifted enough to create visible daylight or cracking around the frame needs more than sanding

Call us if: Any of the above sound familiar. These are worth a look before they become bigger issues.

The Bottom Line

Nine times out of ten a sticking summer door is just swollen wood and a twenty-minute fix. Check your hinges first, sand the rubbing spot second, and you're done. If it keeps coming back every summer, sealing the door edges with paint or a good exterior finish will slow the moisture absorption and reduce how much it swells year to year.

If you've tried the basics and it's still not right, or you'd just rather have someone else deal with it, we're happy to help. We serve Moon Township, Coraopolis, Sewickley, Robinson, and the Pittsburgh area. Free estimates — call or text 412-353-5341 or visit handledhome.net.