What are fascia and riser boards and how do I install them?

Fascia and riser boards are thinner and wider versions of deck boards that serve as a non-structural covering for rim joists, stair risers, and stringers. They are sometimes referred to as “skirts” or “trim” boards.

Because fascia and riser boards are thin, Fiberon recommends installing them using 2.5" #8 or #10 stainless steel or composite screws installed flush to the board surface. We do NOT recommend using Cortex face fasteners because there is simply not enough material available for the screw to be properly seated.

Here are the steps to follow when installing fascia and risers:

  • Fascia: Install screws at a maximum 12-inch interval, with three screws across the face at each interval.
  • Risers: Install screws at a maximum of 12-inch interval, with two screws across the face at each interval.
  • In addition, when installing Paramount PVC fascia, apply a zigzag bead of high-quality exterior adhesive to the entire length of the back (the smooth side). Be sure the adhesive is applied within 2 inches of the edges and ends.
  • Do not over-tighten screws. Buckling or cracking could result.
  • Do not install screws within 1.5 inches of board end or within 1 inch of board side as immediate or eventual cracking could result.
  • When installing in temperatures of 50°F (10°C) of higher, install with 1/8 inch (3mm) spacing between the edges and ends.
  • For temperatures below 50°F (10°C), install with 3/16 inch (5mm) spacing between edges and ends.

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