Some experts have recommended only going with brands that are capped with plastic on all sides to help prevent this issue. Many have reported their composite decking becoming prone to growing mold. The only maintenance needed for most brands is soap and water. Trex does not recommend using a lumber wax, sealant, or any other glue or sealant in the installation.
Decking material trex install#
Glue is not used to install composite decks, but you are meant to seal the rough edges of some brands with a lumber wax – be sure to tests out the product that the company recommends if you are super sensitive. The type of plastic is not always specified, but you should ask, especially if you are avoiding PVC vinyl. Most of them now are capped in an outer layer of plastic. These plastics do have a little bit of odor. If you do well with polyethylene or polypropylene that should be OK for you, but ask to see a sample of the ones available near you and see if you can get a sample of one that is as newly manufactured as the one you would buy.
This plastic is usually recycled, like from plastic grocery bags. The plastic is polypropylene (PP) or polyethylene (PE), mixed together with wood dust, pigments, UV inhibitors, and usually borate.
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