The Companies Worth Knowing

Architectural Door and Millwork: two-step distribution of architectural doors, frames, and millwork for the pro channel.

A 13-store family of Ace Hardware locations across DC and Baltimore built on people-first retail.

Door distribution and pre-hanging across North America, part of the Masonite family.

Ultra-efficient fiberglass windows and thin-glass triple and quad glazing.

Window and door hardware, extrusions, and weatherseals for manufacturers. Part of Quanex, sold through OEMs only.

Investment banking and M&A advisory focused on building products and services.

America’s largest window and door manufacturer: wood, Fibrex composite, and vinyl lines across every tier.

Vinyl replacement windows and patio doors sold through authorized West Coast dealers.

Architectural steel, thermal steel, and aluminum windows and doors for custom homes.

Value-tier vinyl windows and patio doors, a Cornerstone brand.

Premium PVC trim, mouldings, and exterior products from The AZEK Company.

Regional association serving independent lumber and building material dealers across the central U.S.

Building Material Distributors: employee-owned wholesale distribution of doors, millwork, and specialty products.

Building products-focused private equity investing in distribution and services platforms.

Two-step distribution of gypsum, insulation, roofing, siding, and millwork from distribution centers nationwide.

High-performance residential glass: LoĒ coatings, insulating glass, tempering, and lamination.

PVC and composite profile extrusion for windows, doors, shutters, and Everlast siding.

Wood and iron stair parts: newels, balusters, handrail, and fittings milled in Virginia.

North America’s largest exterior building products manufacturer: windows, siding, and metal.

Aluminum and vinyl windows manufactured in New York for residential and commercial projects.

Two-step distribution of doors, millwork, and building products for the dealer channel under the VictorBilt brand.

Design, compounding, tooling, and extrusion of energy-efficient vinyl window and door systems.

Residential and light commercial door hardware: locksets, levers, deadbolts, and barn door hardware.

Door and Hardware Institute: education, certification, and standards for the door and architectural hardware industry.

Member-owned hardware, lumber, and building materials co-op serving thousands of independent stores worldwide.

Family-owned two-step distributor of doors, millwork, and specialty building products in the Southwest.

Decorative door hardware: knobs, levers, and entry sets in configurable finishes.

Door frames, sills, weatherstrip, and multi-point systems engineered for entry doors.

Impact-resistant aluminum windows, doors, and glazing systems from the Tecnoglass family, engineered for hurricane zones.

Large-opening door systems: folding, sliding, and pivot walls engineered for coastal ratings.

European tilt-and-turn uPVC window and door systems built in Canada.

Impact glass and glazing systems including Slimpact, the frameless hurricane-rated window and storefront line.

Fenestration and Glazing Industry Alliance: performance standards and product certification, carrying the AAMA legacy.

Luxury aluminum windows and multi-slide doors for modern architecture.

Building envelope consulting: water, air, and thermal performance for fenestration and cladding.

Aluminum-clad door frames, composite frames, grilles, transoms, and rot-solving components.

Polyurethane millwork, mouldings, and decorative accents that install fast and never rot.

Premium hardwood and softwood mouldings milled for the Northeast pro channel.

Equipment, automation, and software for window, door, and insulating glass manufacturing.

Fiberglass and wood entry doors, decorative glass, and the Buffalo Forge speakeasy line.

Exterior contracting: windows, doors, siding, and roofing installed for homeowners and builders.

The authority partner for the building industry: strategy, media, brand, and practical AI. Publisher of Grit Guide.

Global float, coated, and fabricated glass for residential, commercial, and architectural use.

Window and door dealer pairing premium brands with expert specification and service.

Two-step distributor of doors, frames, and millwork for the pro dealer channel.

Northeast-focused windows and doors sold through independent dealers, a Cornerstone brand.

Independent hardware and lumber dealer serving pros and homeowners.

Custom door manufacturing for the pro channel.

Hand-crafted solid steel and bronze windows and doors since 1912.

Iron balusters, newels, and modern railing systems for stair builders and millwork dealers.

Pultruded fiberglass windows and doors, including high-performance and commercial lines.

European-style tilt-turn windows and doors built for Passive House projects.

Global manufacturer of windows, interior doors, and exterior doors across value and mid tiers.

Custom wood, clad, and contemporary window and door lines for architectural projects.

Residential locksets, deadbolts, and smart locks with SmartKey re-keying technology.

PVC sheet, trim, and European-style uPVC window and door systems, made in Huntsville.

Folding, multi-slide, and swing door systems in aluminum, wood, and vinyl.

Custom wood and aluminum-clad windows and doors, built to project spec in Quebec.

Engineered wood components for window, patio door, and fire door manufacturers.

Wood and aluminum-clad windows and patio doors built in Wisconsin.

Family-owned vinyl window and patio door manufacturer with regional plants.

Lumbermens Merchandising Corporation: the buying cooperative for independent lumber and building material dealers.

Luxury Douglas fir and mahogany windows and doors for architectural homes.

Employee-owned two-step distributor of doors, millwork, and specialty building products across the Midwest.

Family-owned Atlanta supplier of doors, windows, millwork, and specialty building products since 1966.

Family-owned interior door manufacturer serving distributors across the West.

Contractor-focused supplier of doors, millwork, and building materials for metro Atlanta pros.

Family-owned maker of premium wood, clad, and fiberglass windows and doors.

Interior and exterior door systems at scale, now part of Owens Corning.

North America’s largest manufacturer and distributor of interior finishings: mouldings, doors, and trim.

Western-market vinyl and fiberglass windows and patio doors, part of MITER Brands.

Two-step distributor of doors, mouldings, and millwork serving dealers across Florida.

The family of window brands spanning MI, Milgard, and PGT across every U.S. region.

Vinyl and aluminum windows and patio doors for new construction and replacement, part of MITER Brands.

Forged architectural door hardware with hand-finished character.

National Association of Home Builders: advocacy, education, and the International Builders’ Show.

Opening glass wall systems for residential and commercial applications.

Acquirer and operator of independent home improvement and LBM businesses across the country.

North American Wholesale Lumber Association: education and connection for the lumber supply chain, home of Traders Market.

Fiberglass patio door systems: sliding, hinged, folding, and multi-slide.

National Fenestration Rating Council: independent energy performance ratings and labels for windows, doors, and skylights.

National Glass Association: education, advocacy, and GlassBuild America for the glass and glazing industry.

North American Hardware and Paint Association: training, research, and advocacy for independent home improvement retailers.

National Lumber and Building Material Dealers Association: advocacy, policy, and education for LBM dealers.

Entry doors, decorative doorglass, patio doors, and sealed glass across 16 facilities.

Manufacturer and distributor of mouldings, stair parts, and specialty millwork.

Decorative doorglass, enclosed blinds, and entry treatments for door manufacturers.

Family-owned wholesale distributor of doors, millwork, siding, and specialty products across the West and beyond.

Roofing, insulation, and composites, plus doors since acquiring Masonite in 2024.

Employee-owned distributor of doors, millwork, and building products across the Midwest since 1907.

Custom luxury glass wall systems: multi-slides, pivots, folding doors, and window walls.

Folding and sliding patio door systems for indoor-outdoor living.

Quoting, configuration, and selling software for building products manufacturers and dealers.

Windows and doors in wood, fiberglass, and vinyl, sold through dealers, showrooms, and retail.

Impact-resistant windows and doors engineered for hurricane zones, part of MITER Brands.

Fiberglass entry doors with Hydroshield technology, plus door glass and components.

Vinyl windows, siding, and exterior accessories for new construction and repair/remodel.

Professional-class entry doors, storm doors, windows, and siding made in Ohio.

Family-owned manufacturer of aluminum, wood, and vinyl windows and doors for residential and commercial.

Global component supplier behind fenestration: hardware, IG spacers, vinyl profiles, weatherseals, and access products. Acquired Tyman in 2024.

Building products distribution at technology scale. Acquired Beacon Roofing Supply in 2025.

Millwork distributor fabricating and supplying doors and door systems to East Coast dealers.

uPVC window and door profile systems with multi-chamber designs and impact-rated options.

Wood interior and exterior doors, stile-and-rail, built in Oregon.

Manufacturer of columns, corbels, and outdoor living products for the pro channel.

Southeast Building Supply Interests: a family of independent LBM dealers serving builders across the Southeast.

Locks, levers, deadbolts, and smart locks from Allegion, trusted in homes for over 100 years.

Vertically integrated wood, clad, and vinyl windows and doors, from their own forests to the job site.

Vinyl replacement and new-construction windows and patio doors, a Cornerstone brand.

Wood doors built in Washington since 1912: exterior, interior, and fully custom.

Executive search and recruiting exclusively for the lumber and building materials industry.

Glazed structures, skylights, and opening glass systems built to order.

National specialty distribution platform: decking, railing, doors, mouldings, and outdoor living brands.

Family-owned door manufacturer since 1866: interior, entry, and specialty doors.

Custom wooden doors, windows, and architectural millwork, family-owned since 1989.

The fiberglass entry door system brand: doors, glass, frames, and components engineered together.

Composite and PVC decking, railing, and outdoor living products from The AZEK Company.

Window and door specialist serving builders and homeowners with premium brands and installation.

Architectural interior and exterior doors in MDF and wood, built to order, part of Marvin.

Door and trim distribution serving dealers across the Southeast.

High-end custom interior and exterior wood doors, plus premium wood windows.

A national network of specialty building materials dealers and distributors operating under local brands.

PVC profile systems for vinyl window and door manufacturers, including color technologies.

Skylights, sun tunnels, and roof windows with installation and warranty programs.

Architectural and residential glass including Solarban low-e and Starphire low-iron. The former PPG glass business.

Vinyl windows and patio doors for new construction and replacement, manufactured in Kentucky.

Pre-hung entry door systems and millwork built for the pro dealer channel.

Window & Door Manufacturers Association: standards, advocacy, and certification for fenestration manufacturers.

Family-owned premium wood and aluminum-clad windows and doors since 1955.

Independent lumber and building materials dealer serving West Coast builders.

Cellular PVC trim, mouldings, and exterior products across the Westlake Royal portfolio.

Replacement windows, doors, and siding sold and installed direct to homeowners through local franchises.

Wood, clad, and cellular PVC windows and doors, part of Woodgrain.

One of the largest millwork operations in the world: mouldings, doors, and windows, family-owned.

Door component manufacturing since 1983: composite jambs, patented thresholds, weatherstrip, hinges, and 2,000+ SKUs.

Aluminum fenestration systems: storefronts, curtain wall, and residential lines.