Royal Building Products, a Westlake company and leading manufacturer of exterior building products, has announced the addition of 5” Smooth Clapboard offerings in Celect® Cellular Composite Siding and Celect® Canvas Unpainted Siding. The new composite siding products feature a smooth brushed finish and the same low-maintenance benefits as traditional Celect products.

The new Celect 5” Smooth Clapboard is available in 15 fade-resistant colors and features a patented interlocking seam design, which keeps moisture out and almost completely eliminates seams.

The new Celect Canvas 5” Smooth Clapboard profile is an unpainted version of Royal’s industry-leading cellular composite siding. Celect Canvas features the same brushstroke finish, woodgrain aesthetics and low-maintenance benefits as traditional Celect products, with the ability to customize the siding color using thousands of exterior vinyl-safe paint shades that fall within the recommended light reflectance value (LRV) rating of 50 and above.

In addition to delivering the sought-after smooth exterior aesthetic with distinct shadow lines, all the Celect Smooth products provide labor-saving benefits for the builder, protection, and insulation from the elements and reduced maintenance requirements for homeowners.

“We are thrilled to be expanding our Celect Smooth offerings this year, with this new 5” profile in both pre-finished and unpainted versions,” said Steve Booz, vice president, marketing, Royal Building Products. “This has been a highly-anticipated addition to our portfolio of innovative exterior products and we are expecting a great response from architects, builders and remodelers.”

Celect Cellular Composite Siding and Celect Canvas Unpainted Siding are both backed by an industry-leading limited lifetime warranty.


Royal Building Products, a Westlake Chemical company, manufactures and distributes leading materials for the home remodeling, building and construction markets. For 50 years, the company’s commitment to quality, innovation and customer relationships has attracted the loyalty of a growing number of building professionals, homeowners, architects, engineers and distributors to its products. With operations throughout Canada and the United States, Royal Building Products offers the renovation, remodeling and new construction industries a broad range of innovative products including siding, trim, accessories, soffit, rainware, mouldings and decking. For more information, please visit


Kriss Swint