Exterior Building Supply

You only get one first impression. Get the best building supplies at GNH Lumber!

  • LP Smartside
  • HB&G
  • Nailite
  • Mid-America
  • BP Emco Roofing
  • McElroy Metal
  • Cultured Stone by Boral
Interlocking Shingles on House

NEW! Centurion Trim Boards

TruCore® protected CenturionTM boards are highly resistant to rot, decay and termite damage when used as recommended and are backed by Claymark’s 50 Year written limited warranty.

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Cultured Stone

Cultured Stone

Whether you choose Cultured Stone® manufactured stone for interior design elements, such as fireplaces and kitchen backsplashes, or exterior accents, you can expect the finest quality from the company that has led the industry in innovation for more than 50 years. 50-year limited warrantee and helps to protect the environment.

TimberTech Decking

LP Smartside

LP® SmartSide® Trim & Siding offers the warmth and beauty of traditional wood with the durability of treated engineered wood. It’s a complete line of high-performance trim and siding products to complement almost any building style. All LP SmartSide products feature our innovative four-component SmartGuard® manufacturing process for strength against harsh weather and to resist fungal decay and termites.

Interlocking Shingles on House

Building Products of Canada - Interlocking Shingles

These shingles create a protective blanket on the roof, making this shingle ideal for shiplap (tongue-and-groove) decks or for roofing over existing shingles. Built to resist wind uplift, this attractive interlocking shingle is a good value and performance.

TimberTech Decking

TimberTech - Decking

TimberTech is low maintenance, safe, durable, and can even increase the value of your home. TimberTech products maintain their color and beauty for years without the work of painting, staining or sealing. And, because it resists mildew, warping and insects, there’s no need to replace rotting, uneven or termite-damaged boards. GNH has all your new deck material needs!

Siding & Trim Products

Trim & Siding

We carry a variety of excellent products for all of your trim & siding needds. Featuring Azek (Trim), Exteria (Stone, brick and wood siding), Lousianna Pacific (Engineered wood siding), Russin (Cedar), Maibec (wood shingles), Fairway Siding, Mitten Siding, Clapboard, Bodyguard siding, and Versatex (vinyl).

Clopay Garage Doors

Clopay Garage Doors

Clopay is America’s leading garage door manufacturer, offering a complete line of residential garage doors that are not only an integral part of your home’s style, but are durable and reliable too.

McElroy Metal Roofing

McElroy Metal Roofing

The Standing Seam Roof System combines the style and beauty of an architectural product with the load handling characteristics of a structural roof system. The long service life, aesthetics, as well as savings in labor and energy costs are among the reasons given for choosing metal roofing.