26 or 29 is a variable that must be considered as is the type of fastener and the pitch of the roof.
Installing metal roofing to strap or not to strap.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
When installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before installing the roofing.
Should it be installed over the existing asphalt or strapping 2.
In many cases it makes sense to remove an old or dilapidated roof and install a metal roof that is better able to withstand the elements.
Standing double locking seam does this tend to sweat on top of asphalt shingles.
Use 1 x 3 strapping and strap six inches down from the peak of the roof and then 16 inch centers down to the eave.
Take these measurements to your metal roof supplier and they will order the correct amount of roofing for you cut to the right length.
The good news is that there are many different solutions in terms of installing metal roofing panels including tin aluminum and steel.
Metal roofing is also available in the form of shingles.
Measure from the peak to the eave and the width of your existing roof.
At a guess i would place the strapping no further apart than 16 oc.
Question from june in new hampshire.
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.