Venting Metal Roof Over Shingles

A steel roof is a lifetime investment lasting 50 years or more if it s a good one.

Venting metal roof over shingles.

Put the steel down directly on a vapor barrier. The options for venting metal roofs are similar to those of other common roofing systems with some special considerations. Pros and cons for metal roofing installation. Ventilation that meets code requirements is adequate for any type of roofing material including metal.

Cool outside air then travels under the shingles to the vented ridge detail 2 pulling out moisture and heat. To vent the roof holes are cut in the old roof detail 1 above the soffit which pulls air through the soffit vents underneath. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. To vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath.

Ventilation basics roof ventilation depends on the simple scientific. A metal roof typically does not increase nor decrease the need for ventilation. Metal roofing is also available in the form of shingles. We do need to mention though one very rare scenario we have seen just a couple of times over our 35 years.

Metal roof over shingles condensation metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it.