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Window Replacement: What to Expect During Installation

A window replacement touches the most critical envelope of your home. Here is the process we follow to ensure zero water infiltration and maximum efficiency.

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Quick Answer

Window replacement takes 1-3 days for a full house (15-20 windows). The two methods are insert replacement (faster, keeps existing frame, $300-$700/window) and full-frame replacement (removes everything to studs, $500-$1,200/window). Full-frame is recommended when existing frames show rot, water damage, or you want to change window size.

Insert vs Full-Frame Replacement

FactorInsert (Pocket)Full-Frame
What's removedSashes onlyEntire window + frame
Time per window30-60 minutes1-2 hours
Interior disruptionMinimalModerate (trim removal)
Glass areaSlightly smallerMaximum glass
Insulation opportunityLimitedFull cavity access
Cost per window$300-$700$500-$1,200
Best forGood frames, budgetDamaged frames, upgrades

Installation Day: Step by Step

  1. Protection — Drop cloths inside and out, furniture moved back from windows
  2. Removal — Old window carefully removed, opening cleaned
  3. Inspection — Frame, sill, and surrounding wall checked for rot or damage
  4. Repair — Any wood damage repaired before new window goes in
  5. Waterproofing — Sill pan, flashing tape, and housewrap integration
  6. Installation — New window leveled, shimmed, and secured
  7. Insulation — Low-expansion foam fills gaps around the frame
  8. Sealing — Interior and exterior trim, caulking applied
  9. Testing — Each window tested for smooth operation and proper locking
  10. Cleanup — Old windows hauled away, work area cleaned

Frequently Asked Questions

It depends. Same-size replacements typically don't require permits. Changing window size, adding windows, or structural modifications require permits. DT Exteriors checks with your municipality and handles permits when needed.

Yes. We replace windows year-round. The key is speed — each window is open for only 15-30 minutes during replacement. We use portable heaters when needed and schedule winter installs strategically.

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