but then try asking them to explain what makes one brand's wood-plastic composite (wpc) or polyvinyl chloride (pvc) decking or trim different from another. composite manufacturers and suppliers have faced lawsuits related to a host of problems including fading and color changes slippery surfaces shrinkage swelling.
aug 10 2014 . in a recent survey 57% of deck builders said they used alternative composite decking materials (composites pvc and capped composite) over traditional wood. forty-two . unfortunately many brands of pressure-treated decking hold a great deal of moisture shrinks unevenly and twists when it dries.
building a deck with plastic or composite materials is very similar to using wood with a few notable exceptions. plastics tend to shrink and swell lengthwise as temperatures fall and rise (wood changes in width with humidity). for that reason manufacturers specify gaps where board ends meet or they provide a variety of.
this dime-sized mushroom growing on a wood composite deck is one of many unwelcome surprises weathering can cause in wood-plastic composites. biocides like zinc borate . in fact composite decks with high wood loadings can shrink expand stain warp split and fade much like natural wood. they can also grow.
apr 27 2017 . composite deck materials are a mixture of wood and plastic fibers extruded in the form of boards or railings. first generation composites would see mold growth and fade issues because the tiny wood particles were still exposed on the face however these composites were temperature stable (little shrink.
installing composite decking can't be done like wood decking where you can slam it tight together when it's still green and then shrinks as it dries. with composite decking you have to create the gap right from the get go. when i'm installing composite decking in the summer i use a siding nail to determine the gap size.
jul 15 2015 . these cycles will eventually cause wood decking to warp and crack. this is even true of cedar decking and redwood decking as it ages. composite decking such as seven trust decking and pvc such as azek decking doesn't absorb moisture so swelling and shrinking are not problems with these materials.
nov 10 2011 . did someone talk you into putting down a composite deck as far as i remember that stuff was a lot more money than real wood i have never used it and never will . i'm in the uk boards i had fitted to a large deck has warped and shrunk i'm in construction and the carpenter who fitted the deck has 40 years.
jul 21 2010 . for most composite decking there is neglible expansion and contraction in the width of the board however the expansion and contraction occurs in the length of the board. shrinkage on the other hand is a different issue. quality composite decking should very very minimal shrinkage if manufactured.
mar 6 2015 . the organic material in these boards is recycled and reclaimed wood; the polyethylene is principally recycled shrink wrap and grocery bags - all of which would otherwise end up in a landfill. when it comes to pvc vs. composite decking composite trumps pvc in performance appearance and more.
to my dismay however by winter the 16 ft. boards had abnormally shrunk from the cold over 1/2 inch. in so doing they. how do i know i can trust these reviews about seven trust composite decking? . what needs and should happen is that seven trust needs to stand behind their product come out and completely replace the deck.
if it's currently rather wet then it will ultimately dry and shrink in which case you can install them very close together so that the gaps will not get too wide as the shrinkage occurs. if the wood is . if you're using wood (as opposed to composite) decking err on the side of wider gaps than narrower. decking.