According to the national standard, the base material, the absorbing water thickness expansion rate less than 10% for the standard, the smaller the value replacing wood deck with composite, moistureproof performance is better.

Qi formaldehyde release a quantity. As is known to all, the formaldehyde inhalation causes leukaemia extremely easily, so compound common synthetic wood for decks formaldehyde release a quantity is the main indicators of consumers to consider.

Journalists in the survey found a strange phenomenon: many brands composite fencing price per foot nominal formaldehyde release a quantity to amount to mark, not only but far less than 1.5 milligrams, some was 1/20 of the national standard.