The Crestline Windows class action lawsuit, filed in 2020, alleges that the company’s windows and doors are defective — that units leak, and that frames warp and crack — and that these failures fall short of what Crestline’s warranty promises buyers. The complaint seeks compensation for consumers who purchased Crestline products within the preceding fifteen years, and the case has been reported as still ongoing.1Replacement Windows Reviews. Crestline Windows Class Action Lawsuit
What the Lawsuit Alleges
Three defects sit at the center of the case: leaking units, warping frames, and cracking frames. The suit claims these problems mean the products do not deliver the durability and performance Crestline’s warranty promises. Some homeowners have described casement window frames warping within a decade of installation, to the point that the windows no longer open properly.1Replacement Windows Reviews. Crestline Windows Class Action Lawsuit
Consumer complaints filed outside the litigation echo the same themes and add more: seal failures that let moisture and streaking appear between glass panes, bowed and twisted frames, broken mullion joints, inoperable hardware, and wood rot in casement sashes.2ComplaintsBoard. Crestline Windows and Patio Doors Complaints Homeowners and contractors have also reported leaks and fogging shortly after installation, along with concerns about the durability of cranks and seals.3Window Hardware Direct. Comprehensive Crestline Windows Reviews
The Warranty at the Center of the Dispute
Crestline’s limited warranty, effective September 1, 2015, covers product lines including the Select 500, Crestline Acclaim, and Elite Premium series. Coverage varies by component. Wood rot on clad wood products is covered for thirty years. The general window product warranty runs twenty years. The insulated glass seal carries a lifetime warranty that becomes prorated after twenty years.4Crestline Windows. Crestline Limited Warranty
The remedy is Crestline’s choice. Under the terms, the company alone decides whether to repair, replace, or refund the original purchase price. The warranty does not cover the cost of removing defective products, installing replacements, or any necessary refinishing. It transfers to later homeowners, but only for the lesser of ten years or the original warranty period measured from the date of manufacture.4Crestline Windows. Crestline Limited Warranty
One provision matters directly for anyone considering joining the class: the warranty contains a class action and jury trial waiver, requiring disputes to be brought in an individual capacity. Consumers who want to opt out of that waiver must do so through an online form within sixty days of product installation.4Crestline Windows. Crestline Limited Warranty
How Crestline Has Handled Claims
Consumers have reported difficulty getting Crestline to honor its warranty on paper. Complaints describe the company denying claims by attributing defects to improper installation, homeowner humidity levels, or normal wear rather than acknowledging manufacturing flaws. Some customers reported being charged more than $1,000 for replacement glass on windows deemed out of warranty, and $260 simply to send a service technician to inspect a five-year-old window. Slow response times and difficulty reaching customer service have been recurring themes, with reports of an unresponsive service department, broken email links, and long hold times.2ComplaintsBoard. Crestline Windows and Patio Doors Complaints
Status of the Case
The class action began in 2020 and has been reported as still ongoing. The specific court, docket number, and lead plaintiffs have not been widely publicized, and as of early 2026 the law firm handling the case had not been publicly identified in available reporting.1Replacement Windows Reviews. Crestline Windows Class Action Lawsuit
Which Company This Is, and Isn’t
Crestline Windows is a private company headquartered in Medford, Wisconsin.5ZoomInfo. Crestline Windows Company Profile It appears closely tied to Weather Shield today, with an official contact email of menards@weathershield.com.6Crestline Windows. Crestline Windows and Doors Its products are sold primarily through Menards for new construction, full-frame replacement, and pocket replacement applications.7Retrofit Magazine. Crestline Warrants Vinyl Windows Accidental Glass Breakage
Crestline is a separate company from MI Windows and Doors, a much larger manufacturer that has faced its own product-defect litigation. MI Windows and Doors is now part of MITER Brands, and Crestline is not listed among MITER’s portfolio of brands.8MITER Brands. Our Brands The two are sometimes confused because both have faced class action litigation over window defects during overlapping time periods, but they are distinct corporate entities with separate products and separate cases.