Sheet Metal Roof Expansion Joints

Copper or stainless steel is recommended lock and seal all joints solder joints on slopes less than 3 12.

Sheet metal roof expansion joints.

E coefficient of linear expansion of copper 0 0000098 per degree fahrenheit dt temperature change in degrees fahrenheit calculation of movement is rarely required in short roof pan construction since the details shown here can accommodate thermal movement of short pans. Our roof covers have extensive model options for flat and built up roofs. Standard sizes to fit expansion joint opening of 2 3 or 4. Standing seam roof systems were designed to allow roof movement and should be specified when roof movement is expected to be a problem due to the design of the building and secondary structurals.

4 apply a generous bead of waterproof roof caulk to both edges of every 6 inch wide. Flat seam roofs used in low no slope areas or areas subject to flooding or standing water typically made from 20 x 28 sheets relative geometry is important fro expansion and contraction sheet use efficiency and wind load. Anodize finish available upon request. The science thermal expansion occurs when heat is added to most materials causing the material to expand.

Uniquely addresses wall joint to roof joint interface uv stable tpv or pvc for broadest liquid and sheet membrane compatibility what s different. Get moisture protection from the top down with roof covers from construction specialties. Perma tite expansion joints are ideal for allowing thermal movement and condensation control between two roof systems. The waterproofing elements of roof expansion joints currently are looped membranes.

The loops either hang down into the joint in the case of metal cover systems or are humped up by means of. The expansion joint prevents condensation by insulating against internal building temperatures. We were working with sheet lengths up to 29 3 metres so thermal expansion was an issue. Also the continuous cleat protects the perma tite expansion joint from wind driven rain.

Technical paper architectural sheet metal manual. Exterior cap is available in 24 prefinished kynar 500 colors. Roof to roof version. Tear the tape off at the start of the seam and begin taping again on the opposite side of the metal sheet.

Custom sizes upon request. Presents practical troubleshooting and corrective tips for typical problems of roof panels gutters downspouts fascia copings flashing ridges and hips valleys expansion joints penetrations fasteners and soldering.