The first goal of roofing underlayment is to keep the roof deck dry before installation of the metal roofing material.
Slats under metal roof.
Underlayment must also act as a secondary weather barrier in case the roof fails.
Allowable gap between firring strips relates to the ability of the roofing material to resist buckling or crumpling under snow wind or walking loads.
Experienced do it yourselfers can use a nail gun with 8d nail clips instead of a hammer and nails.
Traditionally metal roofs have used standard 30 pound felt paper underlayment.
I prefer to use screws for metal roofing.
For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.
Get the hex head roofing screws with washers and silicone sealer made onto them they will hold a lot longer then nails.
2x4 s on flat 24 oc is what scott s pdf said as a minimum even if overlay on existing decking and old roof covering.
You also could install a corrugated through fastened metal roofing product and probably not have issues.
Yes it will be slats or no slats 5 13 2016 within the installation discussion of the residential metal roofing forum.
5 4 x 4 slats are acceptable decking still not if just 4 oc supported 24 oc if hitting nail penetrations full 1 nail penetration into 2 x structure stock on panel sides.
Thus you have a 1 1 2 clearance from the deck the the underside of the metal roofing which would be screwed into the the vertical slats.
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.
When putting on a metal roof how far apart do you space the furring strips.
The spacing of the vertical slats would not necessarily have to be over the rafters if the decking is good but instead would be spaced according to the width of the panels.
Regardless 1x4 decking slats aren t acceptable.
If your home s existing shingles are pretty curled you could install a textured metal roof such as a metal shingle shake or tile directly over the curled shingles along with underlayment.
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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.
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