Over 25 years ago UnilockŪ introduced patio stones to North America UnilockŪ provides a lifetime guarantee on the structural integrity of its patio stones to the original purchaser of the product for residential use. Material installed using our installation guidelines that proves defective, will be replaced without cost. Color matching cannot be guaranteed and replacement labor is not included. Proof of purchase is required. Patio stones always start at adjoining hard surfaces or buildings, and continue out and away from these surfaces, in one direction. Do not depend on the straightness of adjacent surfaces, and use a string line to determine the straightness of the edge. Keep small trim pieces to a minimum. Be sure to check string lines and patio stones installation frequently. This will allow the detection and early correction of any drift and the avoidance of major corrections. Start with a single row of patio stones under the string line. This ensures that the first row is straight and will provide a straight edge from which to work. When placing the pavers, ensure that 1/8 in. (3 mm) space is maintained between them. Most patio stones manufactured today have built-in spacers to provide for this. Patio stones without spacers shall be laid hand tight, and not kicked into position. Patio stones placed too close together may chip and break under loading.
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