Metal Roof Over Shingles Or Not

Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Metal roof over shingles or not.

That s no longer true. Metal roofs generally can run from 120 to 900 per 100 square feet one 10 foot by 10 foot area or a square of material while asphalt shingles will be between 100 and 200 per 100. Metal roofs are not just a novelty. My experience has been over 35 years and tens of thousands of installations of metal roofs over old shingles.

Once metal roofing was found only on high end architect designed homes. Doesn t provide the flattest surface for the metal roofing to be installed over each course of shingles is about a 1 8 higher than the course just below it. A metal roof can be installed over a shingle roof but you ll need to make sure the plywood under your shingle roof is in good enough shape to handle a new metal roof over top. Both metal and shingle roofs are great options for your next roofing project.

They are available in a variety of colors and textures are low cost and provide a traditional aesthetic. If it s slightly windy keep the steel downwind from you so a gust of wind doesn t knock you over. Metal roofing is increasingly found in conventional houses thanks to increasing availability and improved manufacturing processes according to industry statistics market share for metal roofing has been increasing at a rate of roughly 3 percent each year over. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it. Also don t go up on the roof if it s windy. After all you ll be making a significant and long term investment.

Things to know about metal over shingle roof problems. Fiberglass core or matting an asphalt coating and a ceramic or stone granule surface give this material its durability. Not that it really impacts your question but most metal roofs today are steel or aluminum. I always suggest a layer of underlayment between the old shingles and the metal roof.

Asphalt shingles are the most popular roofing material. Metal roof over shingles condensation.