Metal Roof Over Shingles Or Not

Metal roof over shingles condensation.

Metal roof over shingles or not.

Metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it. 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. Not that it really impacts your question but most metal roofs today are steel or aluminum. Things to know about metal over shingle roof problems.

They are available in a variety of colors and textures are low cost and provide a traditional aesthetic. I always suggest a layer of underlayment between the old shingles and the metal roof. Metal roofs are not just a novelty. 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.

Once metal roofing was found only on high end architect designed homes. Both metal and shingle roofs are great options for your next roofing project. 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. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.

Choosing to install a metal roof this way can save you some dough and garner all of the benefits of a metal roof in the humid climate of florida. 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. If it s slightly windy keep the steel downwind from you so a gust of wind doesn t knock you over. That s no longer true.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. My experience has been over 35 years and tens of thousands of installations of metal roofs over old shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Asphalt shingles are the most popular roofing material.

After all you ll be making a significant and long term investment. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.