Your windows are responsible for up to 30% of your home's heat loss. In Wisconsin, that translates to hundreds of dollars in wasted energy every winter.
A full window replacement for a typical Wisconsin home (15-20 windows) costs $8,000–$25,000 depending on window type and size. Double-pane low-E argon-filled windows are the standard recommendation, while triple-pane is ideal for north-facing windows and extreme cold exposure. Energy-efficient replacement windows can reduce heating costs by 15-25% and are eligible for federal energy tax credits.
Wisconsin's winters routinely hit -10°F to -30°F. At those temperatures, your windows aren't just glass — they're either keeping heat in or letting it escape.
| Feature | Double-Pane Low-E | Triple-Pane Low-E |
|---|---|---|
| U-Factor | 0.25-0.30 | 0.15-0.20 |
| R-Value | ~R-3.5 | ~R-5 to R-7 |
| Sound reduction | Good | Excellent — 15-20% more |
| Condensation resistance | Good | Excellent |
| Cost per window | $350-$700 | $600-$1,200 |
| Best for | Most Wisconsin homes | North-facing walls, bedrooms, energy prioritizers |
Double-pane Low-E argon-filled vinyl or fiberglass windows for most of the house. Triple-pane on north-facing and west-facing windows where thermal performance matters most. This hybrid approach gives you 80% of the benefit of all-triple-pane at roughly 60% of the cost.
| Window Type | Per Window (Installed) | 15-Window Home |
|---|---|---|
| Standard vinyl double-pane | $450-$700 | $6,750-$10,500 |
| Premium vinyl triple-pane | $700-$1,100 | $10,500-$16,500 |
| Fiberglass double-pane | $600-$950 | $9,000-$14,250 |
| Wood-clad double-pane | $800-$1,400 | $12,000-$21,000 |
The Inflation Reduction Act provides a tax credit of up to $600 per year for ENERGY STAR certified windows and skylights. Windows must meet specific U-factor and SHGC requirements. The credit covers 30% of project cost up to the annual limit. This effectively reduces your out-of-pocket cost significantly.
Full-frame replacement — We remove the entire window unit including the frame, down to the rough opening. This allows us to inspect the framing for rot, add insulation, and install the new window for maximum performance. This is what we recommend for Wisconsin.
Pocket (insert) replacement — The new window is inserted into the existing frame. Faster and cheaper, but the old frame may be compromised, and the glass area is slightly reduced. We only recommend this when the existing frame is in excellent condition.
Timeline: Most homes have all windows replaced in 1-2 days. Each window takes approximately 30-60 minutes to swap.
The average replacement window costs $450-$1,100 per window installed, depending on window type, frame material, and pane configuration. A 15-window home typically costs $8,000-$18,000 total. Energy tax credits of up to $600/year can offset costs. DT Exteriors provides free, detailed estimates.
For north-facing and west-facing windows, yes. Triple-pane provides 40-50% better insulation than double-pane, significantly reducing drafts and condensation. For south and east windows that receive solar heat gain, double-pane low-E is typically sufficient. A hybrid approach (triple on cold sides, double on warm sides) is the most cost-effective strategy.
We install premium window brands including Marvin, Andersen, Pella, Milgard, and select commercial-grade vinyl manufacturers. We match the window brand and type to your specific needs and budget. During your free consultation, we'll bring samples and discuss which option best fits your home.
Yes — window replacement can be done year-round. We remove and install one window at a time, so your home is never exposed to the elements for more than 30-60 minutes per opening. We seal each window before moving to the next. The adhesives and sealants we use are rated for cold-weather application.
Free inspections. Transparent pricing. Lifetime warranty on every project.