Do Cellular Pvc Floor Boards Expand And Contract

Below 60 degrees leave a 1 8 in.

Do cellular pvc floor boards expand and contract.

When you re trimming out a window there s not much movement at all but installers will need to pay special attention on. Pvc trim boards will expand and contract with wide variations in temperature. Astm d2665 standard specification for poly vinyl. Pvc also called plastic decking can run between 9 38 and 12 40 per square foot while trex composite decking can cost between 11 to 15 per square foot.

On long runs i cut 15 degree or 30 degree scarf joints. Far from being the durable low maintenance product many homeowners hope that it will be pvc trim can lead to several aesthetic and structural problems over time. You don t have to paint it. There isn t much difference in price between pvc and composite decking either.

For cellular pvc trim as well as most exterior building products the focus is on linear movement since movement along the product s length is what needs to be controlled especially where there are long runs of trim if your cellular pvc trim is going to move it will be most noticeable in the fascia frieze or rake boards on a house. Pvc trim is made from a honeycomb cellular structure of polyvinyl chloride. Astm d2241 poly vinyl chloride pvc pressure rated pipe sdr series dimensions dimensions of pvc pipe sdr series. I use pvc glue in the joint and fasten the joint to the subfascia with trim screws within 2 inches of the end of each board.

That s not to say pvc trim stays entirely stationary. It s lightweight durable and waterproof. For centuries decks have been constructed using traditional lumber with little regard for proper deck board spacing. Temperature expansion thermal expansion of pipes and tubes stainless steel carbon steel copper plastics and more.

But it holds paint well. Both are resistant to insects and aren t prone to mold or rot. Finally i glue the butt joints. If it s between 60 and 80 degrees leave a 1 16 in.

Wood moves due to moisture but plastic products will expand and contract with changes in temperature says steve booz vice president of new product development and product management at royal building products. Deck board spacing is crucial for the looks and health of a deck it s not one size fits all. If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. I also apply construction adhesive between the subfascia and the pvc in the area of the joint.

Assembly of shrink fits heating temperatures of shrink fits. Gap for every 18 ft.