SIW Windows

Windows and Doors Manufacturingsiwsolutions.com

Company typePrivate
Founded2008
HeadquartersDelray Beach, United States
Headcount11–50
GTM typeB2B
OfferingHardware or Manufacturing

What SIW Windows does

SIW Windows (legal entity: SIW Solutions), previously operated under the trade name "Solutions for Impact Windows/Doors," was a Florida-based specialty distributor of Marvin-branded windows and doors targeted at the coastal hurricane-rated construction market. Founded in 2008 and headquartered in Delray Beach, Florida, the company focused on High Velocity Hurricane Zone (HVHZ) and Impact Zone 4 (IZ4) code-compliant fenestration products for residential and light-commercial coastal construction, replacement, and remodel applications in Southeast Florida and adjacent markets. The business operated as a Marvin subsidiary, distributing a curated portfolio of Marvin product collections — Ultimate, Modern, Vivid, Elevate, Essential, and the now-discontinued Coastline — built on proprietary Ultrex pultruded fiberglass, high-density fiberglass, extruded aluminum, and wood substrate technologies.

The business model was a channel-distribution model: SIW supplied Marvin-certified coastal-rated products through a regional dealer network and a direct retail showroom in Delray Beach, generating revenue on dealer margin spreads, direct showroom sales to homeowners and contractors, and specification support for code-driven coastal projects. The portfolio included a Connected Home smart-technology integration tier, indicating an attempt to participate in the IoT-enabled fenestration category, though the input does not describe this capability in depth.

As of November 3, 2025, the SIW Solutions retail operation in Delray Beach was closed and the Marvin Coastline product collection — the company's flagship HVHZ line — was discontinued. These actions effectively wind down SIW Solutions as a standalone coastal-impact specialty brand, with remaining product lines presumably absorbed into broader Marvin distribution channels. Headcount is reported in the 11–50 employee range, and no funding history or external investors are disclosed, consistent with SIW's status as a wholly-owned subsidiary of Marvin rather than an independent operating company.

SIW Windows firmographics

Firmographics

Name: SIW Windows
Legal name: SIW Solutions
Website: https://siwsolutions.com
Company type: Private
Founded year: 2008
Operating status: Closed
Headcount range: 11–50 employees
Ownership category
akta.pro rank

SIW Windows industry classification

Industry

Product category: Windows and Doors Manufacturing
NAICS: Metal Window and Door Manufacturing (332321), Wood Window and Door Manufacturing (321911)
SIC: Metal Doors, Sash, Frames, Moldings & Trim (3442), Wholesale-Lumber, Plywood, Millwork & Wood Panels (5031)
akta.pro primary industry: Custom Window & Door Fabrication & Replacement (HSAPAJAI)
akta.pro secondary industries: Window Replacement (Residential) (HSAPAJAA), Doors, Windows & Millwork Retail (Interior/Exterior Doors, Windows, Moulding) (CRAIAEAI)

Keywords

Windows and doors
Impact-resistant windows
Hurricane zone construction
Fiberglass windows
Custom window manufacturing

Where SIW Windows is headquartered

Location

Headquarters

HQ city: Delray Beach
HQ country: United States
HQ region: North America

Offices1 record

Markets served

SIW Windows business model

Business model

GTM type: B2B
Offering type: Hardware or Manufacturing
Cost components: Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales

Revenue model

Windows and Doors Sales: Sale of custom windows and doors through dealer networks for residential and commercial construction

Go-to-market motion1 record

Distribution channels3 records

Marketing channels2 records

SIW Windows product offering

Product offering

Core offering

SIW Windows, a subsidiary of Marvin, distributes and supplies custom-manufactured windows and doors for coastal impact-resistant construction as well as traditional and modern architectural projects. The offering spans five product collections (Ultimate, Modern, Vivid, Elevate, Essential) in wood, fiberglass (Ultrex®), and aluminum materials, with impact-rated options for HVHZ and Impact Zone regions. Products are sold primarily through authorized dealer networks serving builders, contractors, architects, and residential replacement customers.

Product overview

SIW Windows, in partnership with Marvin, offers a comprehensive portfolio of windows and doors across five main product collections: Ultimate (premium custom), Modern (contemporary with High-Density Fiberglass), Vivid (dramatic sizes with fiberglass), Elevate (traditional with wood interiors), and Essential (streamlined fiberglass). The company also provides specialized solutions for coastal/impact zones and historic projects. The Coastline collection was discontinued in November 2025, ending HVHZ/IZ4 product manufacturing. Marvin Connected Home provides smart technology integration. Products are available in Aluminum, Fiberglass (Ultrex), and Wood materials.

Differentiator

Problem solved

Functional benefit

Products and services

Ultimate Collection

Companies that use SIW Windows

Customer profile

Segments2 records

Ideal customer profiles3 records

SIW Windows technology and API

Technology

Technology focussed No

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

Feature4 records

SIW Windows partnerships and signals

Strategic signal

Scale indicators2 records

Recent moves4 records

Expansion highlights1 record

SIW Windows competitors and assessment

Company assessment

Others

Marvin (parent): Strategic operating parent and primary product supplier to SIW; not a market peer in the strict sense but the source of product, brand, and proprietary Ultrex® fiberglass technology underlying SIW's portfolio.

Broad incumbents

Andersen Windows & Doors: National-scale window and door manufacturer with impact-rated product lines (e.g., E-Series, A-Series) competing in replacement and new-construction segments that overlap heavily with SIW's distribution markets.
JELD-WEN: Diversified global manufacturer of windows, doors, and millwork with extensive residential product lines including coastal/impact products; competes across SIW's price tiers and distribution footprint via two-step and dealer channels.
Pella Corporation: Large national manufacturer of wood, fiberglass, and vinyl windows and doors including impact-rated offerings; overlaps with SIW/Marvin wood-fiberglass hybrid product positioning and dealer-led residential channel.

Direct peers

CGI Windows & Doors: Specializes in impact-resistant, hurricane-rated aluminum windows and doors for HVHZ and coastal Florida markets; directly comparable custom manufacturing model, product certification, and channel strategy to SIW's pre-discontinuation positioning.
WinDoor Incorporated: Manufacturer of premium impact-resistant sliding glass doors and windows engineered for coastal high-velocity hurricane zones; same HVHZ/IZ4 code focus as SIW with comparable materials and dealer network.
Kolbe & Kolbe Millwork Co. Manufacturer of custom wood, vinyl, and aluminum-clad windows and doors with impact-rated coastal lines; comparable custom/architectural positioning and dealer-led distribution to SIW's mid-to-premium collections.
Loewen Windows: Specializes in premium custom wood and aluminum-clad windows and doors for high-end residential and architectural projects, including coastal/impact variants; comparable custom-fabrication model and architectural segment overlap with SIW's Ultimate/Elevate collections.
PGT Innovations (Miter Brands): One of the largest US manufacturers of impact-resistant windows and doors (previously PGT/Sarasota), targeting exactly the Florida coastal and HVHZ segments that SIW served; closest direct comparable in product, code compliance focus, and channel model.

Regional players

Eastern Architectural Systems: Florida-based manufacturer of impact-resistant windows and doors serving the same coastal and South Florida construction market as SIW; comparable product codes, dealer model, and regional concentration in HVHZ-adjacent geographies.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

SIW Windows financial estimates

Financial estimate

Revenue estimate

Valuation estimate

SIW Windows leadership team

Management profile

Number of profiles

SIW Windows funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

SIW Windows M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SIW Windows

What does SIW Windows do?

Is SIW Windows a public or private company?

SIW Windows is a private company. It is classified as corporate owned and is currently closed.

When was SIW Windows founded?

SIW Windows was founded in 2008. It employs 11 to 50 people.

Where is SIW Windows based?

SIW Windows is headquartered in Delray Beach, United States, in the North America region.

How does SIW Windows make money?

One revenue line is on record: windows and Doors Sales.

Who are SIW Windows's main competitors?

Marvin (parent) is listed as an others. Broad incumbents are Andersen Windows & Doors, JELD-WEN and Pella Corporation. Direct peers are CGI Windows & Doors, WinDoor Incorporated, Kolbe & Kolbe Millwork Co., Loewen Windows and PGT Innovations (Miter Brands). Eastern Architectural Systems is listed as a regional player.

Does SIW Windows have an API?

No public API is recorded for SIW Windows.

What industry is SIW Windows in?

SIW Windows's product category is Windows and Doors Manufacturing. Its primary akta.pro industry code is HSAPAJAI, Custom Window & Door Fabrication & Replacement, with a secondary code of HSAPAJAA, Window Replacement (Residential). Its NAICS code is 332321 and its SIC code is 3442.