Troubleshooting reference
Start with symptoms, rule out homeowner-safe basics, and escalate conservatively when safety, structure, utility service, or water damage is involved.
Call soon
Window leaks during wind-driven rain
Likely causes
- Flashing failure
- Failed sealant
- Improper installation pan/sill
Homeowner-safe check
Towel-dry and document wind direction; do not caulk weep holes shut.
When to call
Call soon before framing or drywall damage spreads.
Routine
Glass is fogged between panes
Likely causes
- Failed insulated glass seal
- Age/thermal stress
- Manufacturing defect
Homeowner-safe check
Confirm condensation is inside the glass unit, not room-side humidity.
When to call
Call routinely for sash/IGU replacement and warranty check.
Call soon
Door sticks, rubs, or will not latch
Likely causes
- Frame out of square
- Settling
- Hinge/strike misalignment
Homeowner-safe check
Tighten hinge screws and note weather/humidity pattern; avoid planing before diagnosing frame movement.
When to call
Call if security latch fails, frame is rotted, or movement is structural.
Routine
Drafts or cold spots around windows/doors
Likely causes
- Failed weatherstripping
- Poor insulation around frame
- Air leakage at trim
Homeowner-safe check
Use removable weatherstripping/film temporarily; avoid spray foam overexpansion around frames.
When to call
Call routinely for air-sealing or replacement assessment.
Call soon
Window will not stay open or falls
Likely causes
- Failed balances
- Broken sash cord
- Wrong replacement sash
Homeowner-safe check
Prop open only temporarily and keep hands/children clear.
When to call
Call soon for balance repair; falling sash can injure.
Call soon
Exterior door threshold leaks or rots
Likely causes
- Poor sill pan
- Bad slope
- Missing flashing or worn sweep
Homeowner-safe check
Replace sweep only as temporary; check for soft subfloor.
When to call
Call if water reaches flooring, framing, or basement below.
Routine
New windows are hard to operate
Likely causes
- Out-of-square install
- Over-shimmed frame
- Hardware adjustment needed
Homeowner-safe check
Do not force locks; document before final payment.
When to call
Call installer for adjustment under workmanship warranty.
Call soon
Egress window well fills with water
Likely causes
- No drain or clogged drain
- Poor grading
- Window well cover issue
Homeowner-safe check
Keep water out of the opening and do not rely on a cover alone.
When to call
Call soon; egress wells need drainage and safety compliance.
Routine
Installer discards NFRC labels before documentation
Likely causes
- Tax-credit documentation gap
- Product mismatch
- Warranty registration issue
Homeowner-safe check
Photograph labels, invoices, and model numbers before cleanup.
When to call
Call installer promptly for missing product and warranty documentation.
Routine
Quote omits full-frame vs insert method
Likely causes
- Hidden rot risk
- Different labor/material scope
- Warranty ambiguity
Homeowner-safe check
Require install method, flashing, insulation, trim, disposal, and lead-safe terms.
When to call
Call another installer if method changes are left to field discretion without pricing.
Maintenance schedule
Seasonal tasks
Spring
- In spring rains, watch interior corners and sill stools during wind-driven storms, then photograph the exterior flashing area.
Summer
- During summer, clean window tracks and weep holes, then lubricate hardware only with products approved for the frame.
Fall
- Before cold weather, inspect weatherstrip compression, door sweeps, threshold caulk, and latch alignment.
Winter
- In winter, manage interior humidity so condensation does not soak wood stops or mimic insulated-glass failure.
Interval tasks
Monthly
- Monthly, open and lock each new unit, noting sash drop, rubbing, crank resistance, or daylight at seals.
Annual
- Yearly, check exterior sealant, sill pan drainage, window wells, storm doors, and exposed fastener covers.
Every few years
- Every few years, review NFRC labels, glass warranty age, hardware parts availability, and whether trim rot is spreading.
Cost components
Labor
Crew planning covers measurement, removal, rot repair, flashing, insulation, setting, shimming, trim, hardware adjustment, cleanup, and lead-safe work when needed. The quote should call out opening preparation, rot repair, flashing, shimming, trim work, glass handling, and operation adjustments.
Materials
Cost swings come from windows, doors, insulated glass, sill pans, flashing tape, foam, shims, locks, thresholds, and trim, while routine material coverage includes window/door units, flashing tape, sill pans, foam/insulation, trim, sealants, hardware, glass packages, and storm/security options.
Permits and inspections
Plan for permit time if the work touches egress changes, tempered glass, structural openings, lead paint, and exterior envelope work. The responsible filer should be named.
Broad range discipline
The homeowner budget should separate sash repair, insert replacement, full-frame work, and structural opening changes. Insert windows are lower than full-frame; doors vary by material/hardware; egress, structural changes, custom sizes, and rot repair increase cost.
What moves price
Pushes price up
- Full-frame/rot repair; added cost is usually tied to opening preparation
- Custom sizes or premium glass; added cost is usually tied to rot repair
- Egress/structural changes; added cost is usually tied to flashing
- Lead-safe pre-1978 work; added cost is usually tied to shimming
Can reduce price
- Standard insert replacement; lower pricing is likelier when windows is clearly defined
- Sound frames; lower pricing is likelier when doors is clearly defined
- Multiple same-size units; lower pricing is likelier when insulated glass is clearly defined
- Clear interior/exterior access; lower pricing is likelier when sill pans is clearly defined
Hiring red flags
- A serious bid explains insert windows proposed where rot or bad flashing is suspected before asking for a deposit.
- The estimator dodges questions about checking sill pan and flashing tape sequence.
- Discounted pricing depends on leaving out egress, tempered glass, or door landing requirements and closeout evidence.
- The service promise is silent on glass seal, air leakage, finish touch-up, and water-intrusion exclusions after completion.
- No install method: insert vs full-frame.
- No flashing/sill-pan or rot-repair terms.
- Discards NFRC labels/tax documentation.
- Measures once casually and orders custom product with no confirmation.
Contract checklist
- Window or door brand, size, operation, glass package, NFRC labels, hardware, screens, and interior trim with brands, sizes, locations, and exclusions.
- Insert versus full-frame method, rough-opening repair, sill pan, flashing tape, head flashing, and drainage path before work starts, including who schedules inspections.
- Exterior casing, cladding, caulk, foam type, shimming, fasteners, and paint or stain responsibility for access, protection, cleanup, and disposal.
- Tempered or egress requirements, door swing, threshold, lockset, storm door, and accessibility clearances as unit pricing or written allowances.
- Rot unit pricing, drywall or plaster repair, warranty registration, final operation test, and label packet; collect completion photos, owner manuals, registrations, and lien paperwork.
- Rough opening/unit measurements, install method, brand/model, glass package, NFRC ratings.
- Flashing/sill pan/insulation/sealant details and rot repair unit prices.
- Interior/exterior trim, paint/stain, hardware, screens, disposal, and cleanup.
- Permit/egress/structural/lead-safe responsibilities.
- Manufacturer registration, labor warranty, and tax/rebate documentation.
Warranty norms
Window and door warranties split between installation workmanship, insulated-glass seal, hardware, finish, and screens. Leaks from missing flashing should not be treated like glass seal failure, and condensation from indoor humidity is rarely covered.