Metal Roof Strapping Spacing

Wide holds down the roofin case of severe wind uplift.

Metal roof strapping spacing.

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. The architect spec d horizontal 1x4 strapping over the sheathing and then 15 roofing paper over that somehow thinking that the paper wouldn t sag between the strapping and cause damming not to mention the logistics of trying to hold down all the paper while bringing tin onto the roof without making holes in the paper. Galvanized sheet steel strapping about 1 1 2 in.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. 12 if installing over existing shingles the roof should be strapped with minimum 1 x 4 strapping at 24 centres panel installation should begin at the gable end of the roof opposite the prevailing rain bearing. Edit answer for another 41 minute you need to check the installation instructions from the manufacturer depending on whether the purlins firring strips are 1x or 2x material and how wide thickness metal gage of roofing steel or aluminum type of seams design wind and snow loading whether designed to be walked on or not etc i have seen it vary from as little as 4 inches clear gap between firring strips on lightweight aluminum to as much as 4 feet on very heavy gage steel. In case some moisture finds its way into the roof.

Twenty four inches is a common spacing of furring strips for a metal roof. At a guess i would place the strapping no further apart than 16. 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. Question from june in new hampshire.

Place corner pieces where panels will meet bends at the edge of the roofing. To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel. Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. 26 or 29 is a variable that must be considered as is the type of fastener and the pitch of the roof.

Wider panels allow for greater spacing between rafters. If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Will need to install your metal roof.