When installing a metal roof over an existing roof before installing the.
Slats under metal roof.
I prefer to use screws for metal roofing.
The first goal of roofing underlayment is to keep the roof deck dry before installation of the metal roofing material.
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.
You also could install a corrugated through fastened metal roofing product and probably not have issues.
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.
Follow this question.
If you have a good solid roof other than some shingles it would be ok to put down slats if you nail or screw them to the rafters screwing or nailing into plywood will not hold over time.
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.
However the screw placement diagrams commonly are.
Allowable gap between firring strips relates to the ability of the roofing material to resist buckling or crumpling under snow wind or walking loads.
Underlayment must also act as a secondary weather barrier in case the roof fails.
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.
For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.
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.
Traditionally metal roofs have used standard 30 pound felt paper underlayment.
Regardless 1x4 decking slats aren t acceptable.
Do you have the same question.
Experienced do it yourselfers can use a nail gun with 8d nail clips instead of a hammer and nails.
I m sold on a metal roof.
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.
