Venting Metal Roof Over Shingles

One of the big reasons homeowners choose metal roofing is for the uninterrupted run of metal from the top of the roof to the gutter which reduces the risk of leaks.

Venting metal roof over shingles.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. A metal roof typically does not increase nor decrease the need for ventilation. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. Things to know about metal over shingle roof problems.

It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters. Installing metal roofing over shingles can help solve these issues. After all you ll be making a significant and long term investment. Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath.

Metal roof over shingles condensation. When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic. A steel roof is a lifetime investment lasting 50 years or more if it s a good one. Cool outside air travels under the shingles to the vented ridge pulling out moisture and heat.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Also don t go up on the roof if it s windy. If it s slightly windy keep the steel downwind from you so a gust of wind doesn t knock you over. We do need to mention though one very rare scenario we have seen just a couple of times over our 35 years.

3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Both metal and shingle roofs are great options for your next roofing project. Ventilation that meets code requirements is adequate for any type of roofing material including metal.

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