Window & Door Caulking
Window and door caulking is the service that strips failed weather-seal bead at exterior window and door perimeters, casings, and thresholds — re-bedding outside joints in 20-year polyurethane or hybrid MS sealant and interior trim gaps in paintable siliconized acrylic, with ladder work up to 24 feet — starting at $180 per opening. The cracked white bead at the outside corner of a bedroom window, the gap between the door casing and the drywall that opened up after the first winter, the threshold under the front door where you can feel cold air with the back of your hand. The work fails twice as fast as bathroom caulking because the freeze-thaw cycle, UV exposure, and seasonal building movement all attack it. Handis strips the failed bead, picks the right product for the exposure, and ladders up to the second-story windows your last contractor skipped.
Service
How Window & Door Caulking Works
Six sequential steps from strip-and-prep on the failed bead to the color-matched paintable finish — the actual sequence we follow on every window and door caulking visit.
Strip the Failed Bead to Clean Substrate
Pull every cracked, lifted, or split bead off the window casing, door frame, threshold, or interior trim seam. A new bead over a cracked old bead is a four-month fix at best — the strip is what determines whether the next bead lasts six months or six years.
Pick the Right Product for the Exposure
Exterior gets polyurethane (Sika 1A or Loctite PL Polyurethane) or a hybrid MS sealant (DAP Dynaflex Ultra) — rated for 20-year UV and plus-or-minus 25 to 50 percent movement. Interior trim gets siliconized acrylic (DAP Alex Plus or Sherwin-Williams Painters Caulk). Latex on a window is a two-winter product and we do not carry it.
Ladder Up to Second-Story Windows
A 24-foot extension ladder with proper standoff brackets keeps the ladder rails off the wet fresh bead on the casing. Setup, fall protection, and slower bead-laying speed at height add 15 to 30 minutes per window. Windows above the second story get a per-visit quote after a photo review.
Run the Bead in a Single Motion
Cut the nozzle to match the gap (3/8 inch on stucco or brick, 1/4 inch on smooth wood or fiber cement), then lay a continuous bead in one motion across the casing-to-siding seam, around the door casing, along the threshold, or across the interior trim-to-drywall gap. No stop-and-start.
Dry-Tool the Bead Profile
Tool every bead dry with a plastic shaping tool, pulling once across the joint. The bead ends concave, fully adhered to both edges, no thin spots. A wet finger and dish soap leave a hairline crack down the centerline as the bead cures — we tool dry on every joint, every visit.
Color-Match Exterior or Paint Interior
Exterior polyurethane is available in white, almond, bronze, and brown stock — picked to match the trim paint. Unusual trim colors get a paintable polyurethane and a brushed coat of the trim paint after 15 to 30 minutes of skin time. Interior siliconized acrylic disappears into the trim line at the next paint coat.
Window & Door Caulking Pricing
Final pricing depends on opening count, ladder height for exterior work, and whether interior trim is being caulked pre-paint or post-paint. Request a free estimate for an accurate quote.
Tell us the window count, the story height, and whether it is exterior or trim — we will quote it.
Why Handis for Window & Door Caulking
Exterior window caulking is the trade where the wrong product looks fine for the first six months and fails on the second winter — and you do not see it fail until water shows up inside the wall or the bedroom drafts in January. Standard latex caulk has zero UV resistance and ±5 percent movement tolerance; the freeze-thaw cycle in Seattle alone moves a wood casing-to-siding joint ±15 percent every winter. Polyurethane handles ±25 to ±50 percent movement and 20 years of UV. The product is the difference. We do not carry the wrong tube to a window job.
Estimate
Number of windows and doors, story count, exterior or interior, and any visible failure (cracked, pulled away, missing) — we will quote it.
Customer Reviews
Window and door caulking reviews from real Handis customers.
1948 brick rambler, eleven exterior windows. The original caulk was cracked through and the bedrooms were drafty every winter. Tech laddered up to the higher windows (we have a tall front gable), stripped every bead, and ran fresh polyurethane on all of them. Half a day total. The next winter felt different.
Pre-paint interior caulking on a 1940s house where every window and door casing had a gap to the drywall. Tech went room by room, filled and tooled every seam. Painter showed up the next morning and said it was the cleanest prep he had seen on a job that was not his. Trim line came out flawless after the topcoat.
Front door — cold air coming under the threshold every winter despite a brand-new sweep. Tech sealed the threshold-to-slab joint underneath with an exterior butyl product and re-caulked the casing on both sides. Draft stopped. Should have done it years ago.
Six second-story windows at the back of the house. The original builder's caulk had failed and one window casing was visibly pulling away from the siding. Tech brought the right ladder and stand-off bracket so the ladder did not damage the wet bead. Half a day's work, all six clean fresh polyurethane in a color that matched the trim.
Whole-house interior trim caulking before we listed. Every door casing, every window trim gap, every baseboard return. The previous owner had clearly skipped this step in a 'flip' paint job and you could see every seam against the new paint. Two days of work, two coats of paint after, and the house showed photographs ready.
Frequently Asked Questions
Common questions about window and door caulking.