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Our Construction TypesAfter installing over 30,000 homes with shutters, we have never had a shutter separate or fall apart. The reason for this success is in how Signature Shutters constructs our shutters. While most manufacturers in our industry use wood dowels to fasten their parts, at Signature Shutters we fasten our components together with screws, tongue and groove joints and glue (photo below).When fastening any two parts together (this applies to all products, not just shutters) proper engineering standards are to use materials with dis-similar coefficients of expansion (delta t). Wood dowels and wood stiles are of the same material and therefore have the same delta t. Any forces (heat, humidity, weight, etc) induced upon these materials will cause them to react in the same way (expand or contract) and to do so concurrently. In the case of a wood dowel inserted into a wood stile, the dowel will expand, thus enlarging the hole, then upon shrinking will leave a gap between the dowel and wall of the hole.... resulting in joint failure. At Signature Shutters, by using steel and wood together, you have different delta t's and therefore no joint failure. In addition to the use of more expensive fasteners, we also tongue and groove the joint to allow extra surface area for our glue to adhere to, and to add shear strength. Check out a chart which points out our construction features. ![]() |
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