Strapping Under Metal Roof

Question from june in new hampshire.

Strapping under metal roof. The gauge of the metal 24. The metal roofing system and its expected service life the climate at the building location roof slope and geometry and ambient conditions temperature relative humidity within the building. One installs wood strapping on top of existing asphalt shingles then screws nails metal shingles to the strapping. At a guess i would place the strapping no further apart than 16.

There are two ways to do this put in firring nailing though nails are not used any more for this strips or purlins in steel frame construction on the roof to support it or place the metal roofing directly on a flat surface like foam insulation board or the roof sheathing with roof water barrier in the correct position in the layer. In the local area london on the two metal roofing companies i have talked to so far have two different approaches to installing metal roofs. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Use a tool belt that has a hammer loop to hold nails a measuring tape chalk line and a hammer when installing the wood.

When installing a metal roof over an existing roof before installing the. 26 or 29 is a variable that must be considered as is the type of fastener and the pitch of the roof. Place the first screw. Should it be installed over the existing asphalt or strapping 2.

Standing double locking seam does this tend to sweat on top of asphalt shingles. Experienced do it yourselfers can use a nail gun with 8d nail clips instead of a hammer and nails. We are in the process of contacting contractors regarding the installation of a metal roof on our home and with each contractor that comes to the house we are getting more and more confused. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.

Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof.