Composite 4×4 boards manufactured with a proprietary mineral fill technology. Because Lumberock is made with a non-organic mineral fill technology, our 4×4 boards are impervious to moisture and resistant to rot and bacteria.
Choose from 12 vibrant designer colors that will maintain their color for decades with our UV resistant color formula. All 4×4 boards come with our limited lifetime warranty.
Custom lengths of our beyond composite lumber 4×4 can be purchased with a minimum order of 1,000 feet or more.