Should Metal Roofing Have Lathing

The metal will be attached to at least 3 4 purlin and 1 2 plywood instead of just 1 2 plywood which should make the overall roofing system stronger.

Should metal roofing have lathing.

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. The roofing is manufactured in panels that. Some metal roofs have wood framed eaves that extend several inches or a foot beyond the house or shed wall to support metal roofing. Thanks edward for allowing me to share our correspondence on this frequently asked question.

This great question comes from edward c a homeowner who plans to have a new metal roof installed over the aging existing shingles on his single story home. This gets snow and ice drip line farther away from the building walls without the danger of the metal roofing bending under the weight. 1 you said some metal roofing should never have firring strips i have certainly seen that with some of the very thin steel or weak aluminum decking which could never stand even a foot of free span over firring strips without crumpling buckling under someone walking on it so they would have to lie flat on the water barrier over the sheathing. We appreciate any input.

We re getting different opinions about the necessity of lathing under the metal roofing. We re having a crew put on a metal roof and they have most of it on but there are alot of waves in it and the flashing dont cover the facer boards. 1 x 4 lathe. One wants to strip the old roofing refelting and installing the metal roofing.

I have removed all the old shingles from the roof boards not plywood the roof is in great shape and have installed an ice shield over the roof. Installing wood stripping under a tin roof. But probably the best benefit that comes from using purlins is the air gap it creates between the metal roof and the existing shingle roof. Can i install the metal roof over the ice shield or do i need the 1 x 4 battens every 2 feet as well it s a low slope roof thus the ice shield for extra protection.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.