Place it two feet apart from the first row.
No furring strips under the tile roof.
If there are gaps around the roof penetration or valley points cut extra sections of furring to fit.
There is a new synthetic material on the market that is used for furring strips under a roof.
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.
When finished there should be a row of furring strips stretching from one end to another with the top edge aligned at the peak.
The final step is securing a secondary row of furring strips along the roof.
I mention this because some metal roofing shingles requires a horizontal purlin for attachment purposes.
Or installing the new metal roofing over furring strips 1 x 3s or similar will raise the metal and provide a ventilating air pocket between layers.
Find roof panel closure strips at lowe s today.
It is grooved so that it can be installed horizontally.
This does not work well with asphalt shingles because asphalt shingles are designed to go into plywood which has no gaps.
Furring strips are 4 wide boards that are spaced apart several inches to hold up cedar shakes while allowing them to breathe.
If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot.
They re installed before the tile is laid on the roof and may serve more than one purpose.
But roofers can install a vented metal roof that eliminates this potential problem.
Roof battens are thin strips of material that may be made of wood plastic or metal.