the standard of test method in perforation extraction, dryer watertight composite stair treads fence , climate box method, the comparison test by perforation extraction and desiccator method, there are two kinds of set limit to sign in the standard, namely the E1 and E2 marks, meet the requirements of the E1 can be directly used in indoor anti fungal wood plastic composite decking boards ,
must meet the requirements of the E2 after finishing processing is allowed for indoor; 2, formaldehyde release a quantity to E1 conclusion column) in the said sample formaldehyde release a quantity to conform to the requirements of the E1 supplies for balcony building wood fence , square root E2 said sample formaldehyde release a quantity to conform to the requirements of the E2, * E1, 2 said sample formaldehyde release a quantity to do not conform to the requirements of the E1 and E2,
which do not conform to the standard tongue and groove paneling for walls . Aggrandizement wood floor price of every square metre 70 yuan of above is the normal price, installation quality cannot be ignored.