Marvin has discontinued its Coastline collection and is permanently closing its West Palm Beach facility in April 2026—exiting the High Velocity Hurricane Zone and Impact Zone 4 market entirely. Here's what spec writers, architects, and coastal contractors need to know about a major retreat from the country's strictest impact code region.
A Major Manufacturer Walks Away From the Country's Toughest Impact Code
The High Velocity Hurricane Zone (HVHZ) just lost one of its premium window brands. As of November 3, 2025, the Marvin Coastline product collection has been discontinued, and the SIW Solutions retail operation in Delray Beach, Florida, is now closed. With this discontinuation, Marvin will no longer manufacture products for High Velocity Hurricane Zone (HVHZ) or Impact Zone 4 (IZ4) regions.
The shutdown is now playing out in phases. A WARN notice filed with the State of Florida confirms that the closure of the Marvin Coastline facility at 6717 Belvedere Rd, West Palm Beach, will occur on or about April 17, 2026, and is expected to be permanent. A total of 181 employees from the Coastline manufacturing facility in West Palm Beach and the SIW Solutions retail operation in Delray Beach are impacted.
For architects, glaziers, and building envelope consultants working anywhere from Miami-Dade up through Palm Beach County, this is more than a product discontinuation. It's a structural shift in who supplies the premium end of the country's strictest impact-resistance market.
What's Being Pulled From the Catalog
The discontinuation isn't limited to the standalone Coastline brand. Impact Zone 4 (IZ4) products—including Ultimate Casement, Awning, Direct Glaze windows, and Swinging French doors—are no longer manufactured. Marvin continues to offer IZ3 solutions for most coastal impact regions.
In practice, that means any open spec calling for a Marvin product carrying a Miami-Dade NOA or a Florida Product Approval with the HVHZ endorsement needs to be re-evaluated now. Coastline's design appeal was specific: impact-resistant glass engineered to stand up to the punishing winds and flying debris generated by tropical storms and hurricanes, with decorative pattern options including rain glass and glue-chip, Low-E coatings, and laminated white interlayer that meets Sea Turtle Conservation Code requirements. Replacing that combination of code compliance, aesthetics, and conservation-code-compliant glazing isn't a one-for-one swap.
Why Marvin Is Pulling Back—and What It Says About the Market
The Coastline line wasn't a fringe SKU. It was originally developed by SIW and later rebranded under Marvin, well-known for offering sleek architectural designs while meeting some of the strictest impact-resistance codes in the country. Manufacturing the line required a dedicated Florida facility, a separate retail arm in Delray Beach, and the engineering overhead to keep up with Miami-Dade and Florida Building Code approvals.
Marvin is not exiting impact windows entirely; they are pivoting away from the most extreme HVHZ hurricane zone areas and keeping other impact products in lines like Ultimate and Elevate for non-HVHZ coastal regions. For a Minnesota-based manufacturer, the math on a single-region product line—with its own product approvals, distribution, and a 181-person facility—apparently stopped working.
Practical Implications for Spec Writers and Contractors
1. Audit live specs and open submittals. Any project still in design or procurement that names Coastline, or Ultimate HVHZ/IZ4 configurations, needs a substitution clause invoked now. Employee separations are occurring in phases on or about January 5, 2026; January 31, 2026; March 31, 2026; and April 17, 2026—meaning service, warranty support, and replacement glass availability will become progressively harder to source through the spring.
2. The IZ3 / IZ4 line matters more than ever in spec language. A spec that simply says "impact-rated" or "hurricane-rated" is now ambiguous in a way it wasn't six months ago. For projects in Miami-Dade, Broward, and coastal Palm Beach, the spec needs to explicitly call out HVHZ approval with a current NOA reference number—not a brand name that no longer makes the product.
3. Premium HVHZ supply concentrates further. For South Florida and HVHZ work, the practical takeaway is that Marvin no longer positions itself as a HVHZ player; alternative brands like PGT, ECO, and ESW are now the primary route. PGT in particular sits inside the MITER Brands portfolio, meaning a small handful of corporate parents now control most of the premium HVHZ window market.
4. Watch lead times through 2026 hurricane season. With Marvin's manufacturing winding down through April and remaining HVHZ producers absorbing displaced demand, lead times on premium aluminum impact windows and large multi-slide impact doors are likely to stretch. Projects targeting a pre-hurricane-season certificate of occupancy should be locking in HVHZ orders now.
The Bigger Pattern
Marvin's exit follows a broader theme spec writers are already tracking: manufacturers concentrating product lines around their highest-volume, lowest-complexity SKUs, and walking away from regional code regimes that demand dedicated tooling, approvals, and inventory. HVHZ is one of the most expensive jurisdictions to serve—and the first national-brand premium exit signals the cost-to-serve calculation has shifted. Expect more rationalization announcements before the 2027 IBC and FBC cycles land.