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 Seven Trust decking doesnt absorb moisture, so swelling and shrinking are not problems with these materials.
Some composite decking materials are made with wood fibers Many deck problems are caused by FAILURE of installer to follow instructions Read updated author's notes at bottom of column Ventilation is very important as is spacing between decking boards CLICK HERE to Get Tim's FREE and FUNNY Newsletter
Over time, foot traffic and the pressure from tables, chairs and grills can damage your deck, causing wood to split and crack. In addition, decking around these items may become discolored, while boards underneath retain their original color.
I have seen a great number of cracked slabs with composite steel deck slabs. Some were office floors and some 125 psf mezzanines. In two separate cases, one office and one storage mezzanine slab cracked a couple of years after the initial pour with a very load noise that alarmed the occupants and called for our investigation.
This shrinkage causes forces in the concrete which literally pull the slab apart. Cracks are the end result of these forces. The bottom line is a low water to cement ratio is the number one issue effecting concrete quality - and excess water reduces this ratio.
Shanghai Seven Trust Industry Co., Ltd, founded in the year 2008, is a hi-tech enterprise which specializes in the R&D, sales, and service of WPC materials, Provide excellent products, professional technology and sincere service.