Understanding Glass Breakage in Milgard Windows

Most homeowners don’t think about broken windows until it happens. Whether from an accident or sudden temperature change, glass breakage can be expensive. That’s why Milgard Windows offers one of the strongest glass breakage warranties in the industry — and understanding how it works can save you hundreds, even thousands, of dollars.

Milgard Glass Breakage Warranty Coverage

• Milgard Tuscany Doors Series V400: Glass breakage is included at no extra cost.
• Milgard Trinsic™ Windows (V300): Glass breakage coverage is available as an optional upgrade for a small fee.
• Milgard Style Line® Windows (V250): Coverage is not available on current models. However, older purchases (before 2018–2019) may still qualify. Call Milgard with your window serial number (found in the spacer bar) to check eligibility.
• Milgard Ultra™ Windows Series (C650): In the past, glass breakage was included. If you own older Ultra windows, Milgard can confirm coverage with your serial number.
• Pro Tip: Always check your serial number with Milgard Customer Service if you’re unsure about your coverage. You can call 1-800-MILGARD directly.  

Common Causes of Glass Breakage

• Accidents: Rocks from lawnmowers or flying debris are among the most common causes.
• Spontaneous Breakage: Dual-pane glass can sometimes shatter unexpectedly due to:
• Built-up tensile stress over time
• Rapid temperature swings (e.g., 32°F to 80°F in hours)
• Different heating rates between the inner and outer panes
• Bathrooms & kitchens — sudden heat (like steam from a shower) stresses inner glass

Why Glass Breakage Coverage Matters

Without warranty protection, replacing a broken window can quickly add up:

• Peace of mind — no surprise bills
• Higher resale value — transferable warranty boosts buyer confidence
• Long-term savings — a single door replacement can cost more than years of optional coverage

Visual Examples of Glass Breakage

Adding real-world examples helps homeowners identify issues faster:

Accidental Breakage Example

Stress Crack Example

Real Customer Reviews

“I love my Milgard Windows. I came home to find the outside glass broken on a bedroom window. I was super impressed to discover the glass under full warranty. The service man who replaced the glass was very nice, efficient and quick.”
— Tacoma, WA (Pierce County)

“We bought our complete house of Milgard Trinsic Windows & Doors from these guys. I originally did not have glass breakage insurance added to my online order however after speaking to the owner I took their suggestion on adding the breakage insurance after the owner explained to me why. I know he was being truthful and I am happy that I did. They were the best price up front with no games.”
— San Marcos, CA (San Diego County)

“One of my Milgard Black Trinsic Replacement windows went bad after 2 years and I called 1stwindows.com because I bought them online originally about the issue and they immediately said they would fill out my service request for the window. Turns out I had glass breakage insurance on the door panel! I had to wait a bit but the service person was excellent and changed out my door glass in little time. He also explained the process. Cleaned up well also.”
— Hermosa Beach, CA (Los Angeles County)

Bottom Line

If you’re purchasing Milgard Trinsic Windows, adding the optional glass breakage warranty is a smart choice. With Milgard Tuscany Windows, you’ll already enjoy full coverage at no cost.

Either way, protecting your investment ensures you won’t face an expensive surprise when accidents or sudden temperature changes cause damage.

Douglas Lopez

is a Certified AAMA Installation Master with over 30 years’ experience installing Milgard Windows & Doors. As the founder of 1stWindows.com, one of the first authorized Milgard Platinum Certified dealers to sell windows online, Douglas has helped thousands of homeowners across Arizona, California, Colorado, Nevada, Oregon, and Washington find the right Milgard products with factory-direct pricing and expert support.