Milgard White Vinyl Single Hung Window 2-6 x 4-0 with Screen

This window delivers proven energy efficiency with U-factors as low as 0.31 and includes Milgard’s full lifetime warranty covering both parts and labor. The dual-pane glass with Low-E coating handles Montana’s temperature extremes, while the fusion-welded vinyl frame stands up to decades of freeze-thaw cycles. At 30” x 48” nominal size, it fits standard residential rough openings without modification.

Energy Performance and Installation Specifications

The numbers that matter for Montana contractors start with thermal performance. The V250 Style Line hits U-factor 0.33, while the V400 Tuscany drops to 0.31. Both versions deliver SHGC 0.26 — low enough to prevent summer overheating but high enough to capture beneficial solar gain during Montana’s long heating season.

Sound transmission class (STC) rating sits at 30, which blocks highway noise and neighborhood sounds effectively. That matters when you’re building near busy corridors or commercial areas.

Specification	V250 Style Line	V400 Tuscany
U-Factor	0.33	0.31
SHGC	0.26	0.26
STC Rating	30	30
Frame Type	Slim Profile	Classic Profile
Lock System	Positive Action Lock™	SmartTouch® Lock

The proprietary vinyl formula resists warping and cracking through temperature swings. Fusion-welded frame and sash construction eliminates corner separation — a common failure point in lesser windows after years of thermal cycling.

Installation flexibility comes standard. Mounting options include flange/finless for replacement projects, mounting fin for new construction, and J-channel configurations. Milgard provides detailed installation PDFs covering various wall types including delta mull and setback applications.

Hardware, Security, and Warranty Coverage

The lock mechanisms separate these series clearly. V400 Tuscany gets the SmartTouch® Lock — which earned an Ease-of-Use Commendation from the Arthritis Foundation. V250 Style Line uses the Positive Action Lock™ for straightforward operation. Both configurations meet California forced-entry codes, which exceed Montana requirements.

The lifetime warranty covers parts and labor for the original homeowner. Here’s where the series diverge: V400 Tuscany includes glass breakage coverage standard, while V250 Style Line excludes it. Warranty transfers to subsequent owners for a limited period, typically 10 years.

Customer feedback consistently highlights improved energy efficiency, quiet performance, and ease of operation. Milgard’s reputation for quality vinyl windows has been recognized as some of the best in the industry. The company backs that reputation with comprehensive warranty coverage that contractors appreciate.

Grid options include flat, sculptured, and simulated divided lite (SDL) styles for matching existing architecture. All three series — V250 Style Line, V400 Tuscany, and V300 Trinsic — accommodate both replacement and new construction projects.

Every unit includes the window, half screen, installation hardware, and mounting fins for new construction models. That’s everything needed for a complete installation except sealants and shims.

FAQs

What’s the actual difference in heating bills between U-factor 0.33 and 0.31?

The 0.02 difference translates to roughly 6% less heat loss through the window. On a typical 2,000 sq ft home with 15% window area, that energy savings adds up over the warranty period. The V400 Tuscany’s slightly better thermal performance becomes noticeable during extended cold snaps.

Do these windows handle -20°F without interior condensation?

The dual-pane glass with Low-E coating provides decent condensation resistance. The warm-edge spacer technology helps, but at -20°F with normal indoor humidity, expect some condensation on the glass edges. Triple-pane performs better in extreme cold.

How does the screen attach and remove?

The half screen comes standard and operates from the interior. Spring-loaded design allows tool-free removal for cleaning. Full screens aren’t available for single-hung models since the top sash doesn’t open.

Which mounting option works best for log homes?

J-channel mounting accommodates log settling better than rigid fin mounting. The finless option also works well with proper shimming and allows adjustment as logs settle. Check Milgard’s technical resources for setback installation guides.