Cost to Window Caulking & Weatherstripping in St. Louis, MO

$66–$528 in St. Louis

12% below the national average · 0.88x cost multiplier

In St. Louis, a window caulking & weatherstripping runs $66 to $528 on average — about 12% below what homeowners pay nationwide. The Midwest market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.

Cost Breakdown in St. Louis

Line Item	Low	Mid	High
Cost per window	$18	$40	$88
Materials	$35	$70	$176
Labor	$0	$220	$528
Permits	$0	$0	$0
Total	$66-12% vs. national avg	$286-12% vs. national avg	$748-12% vs. national avg

Budget

DIY materials only — caulk and foam tape for 5-10 windows. No professional labor.

Mid-Range

Pro service for 10-15 windows: caulk all seams and install V-strip or foam weatherstripping on each.

Premium

Full-house treatment — all windows and doors, silicone caulk, door sweeps, and energy audit to identify remaining gaps.

Material Options

Material prices below are national averages; availability in St. Louis may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
Silicone Caulk	$8-$20 per tube	25+ year lifespan, stays flexible in heat and cold, excellent adhesion to glass and metal, resists mold	Cannot be painted, requires mineral spirits for cleanup, harder to apply neatly without practice	Exterior window perimeters, glass-to-frame joints, metal window frames25+ year lifespan, stays flexible in heat and cold, excellent adhesion to glass and metal, resists mold
Latex Caulk (Paintable)	$3-$8 per tube	Paintable, easy water cleanup, low cost, available everywhere	Shrinks and cracks within 5-10 years, less flexible than silicone, degrades faster in direct sun	Interior window trim, areas that need to be painted to match, low-movement jointsPaintable, easy water cleanup, low cost, available everywhere
V-Strip (Tension Seal) Weatherstripping	$5-$12 per window	Long lifespan (10-15 years), fits invisibly in the window channel, handles gaps that vary with temperature	Harder to install than foam tape, requires cutting to length and pressing into channel	Double-hung and single-hung windows, sliding windows, door stop moldingLong lifespan (10-15 years), fits invisibly in the window channel, handles gaps that vary with temperature
Foam Weatherstripping Tape	$2-$5 per window	Cheapest option, very easy DIY installation, widely available	Compresses and loses effectiveness in 2-5 years, can interfere with window locking if too thick	Rarely-opened windows, storm windows, budget DIY projectsCheapest option, very easy DIY installation, widely available
Foam Backer Rod + Silicone	$6-$15 per window	Fills large gaps before caulking, prevents caulk from sinking into deep voids, extends caulk life	Adds a step to the process, requires sizing the backer rod to fit the gap	Windows with wide gaps between frame and siding, older homes with settled framingFills large gaps before caulking, prevents caulk from sinking into deep voids, extends caulk life
Door Sweeps	$15-$40 per door	Seals the most common air leak point on exterior doors, available in automatic-lift versions	Must be trimmed to exact door width, can drag on flooring if set too low	Exterior doors, garage entry doors, basement doorsSeals the most common air leak point on exterior doors, available in automatic-lift versions

Other Projects in St. Louis

Full Kitchen Remodel

Basement Finishing

Roof Replacement (Asphalt Shingles)

Back to national average for Window Caulking & Weatherstripping

St. Louis Estimate

Typical Range

$66–$528

vs. National Average

12% below national

Cost Multiplier

0.88x

Cost Per window

$18–$88

Estimates apply St. Louis's 0.88x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.

See national average costs →