How to Install A Metal Roof Over Shingles


You’re in need of a new roof and considering going with a metal roof. Metal roofing is one of the best materials for all kinds of homes. They not only look good but are also very durable compared to shingles. If you’re still deciding on a metal roof and wondering if you can install it over shingles, we are here to help answer that question.


Can Metal Roofs Be Installed Over Shingles?

For the most part, yes you can install a metal roof over shingles. But, you’ll want to make sure that your building department permits it before you decide to proceed with the roof installation. Rules will change depending on the area and some building officials will only allow a re-roof over one layer of shingles, while other officials may allow you to place the roof over two layers of shingles. Fortunately, in most areas, it won’t be an issue if you’re only going over one layer. So, the first step in deciding on a metal roof is possible, you can have the metal roof installed over shingles. Before installation, ensure that your roof meets the minimum slope of a metal roof.

Advantages of Metal Roofs Over Shingles

There are several advantages of choosing a metal roof, but there’s more when you decide to put a metal roof over shingles. When you place metal roofing over shingles, you save in the labor costs of ripping them off while also preventing them from being thrown into landfills. You not only save on labor but you’re also helping to keep the heat in your home by adding an extra layer.


Installation of Metal Roofs Over Shingles

If you have made your decision to install metal roofing over shingles, then there are things you need to keep in mind and know what to look out for. The first step is to know the precautions when it comes to the underlying material, such as fixing any roof leaks or replacing rotten pieces of roofing. You also need to look out for any signs of your previous roof weighing too much, this can look like buckling or sagging decking.

Other items you should consider are:


When installing the roof, you should apply the screws in the flat of the steel, as specified by the manufacturer, and in a way that it creates spacing for a good view from the ground. For the best results, use screws as they would be better than nails. When placing the screws, the ideal space is between 25 and 30 inches apart and skip every other rib to create no more holes than necessary in your roof.


For your home to look its best, it’s important to ensure that the trim is placed properly. The edges must be surrounded with flashing, which improves the appearance and provides resistance against rain, snow, and wind. You also should consider ice guards even if you don’t have gutters. If you’re taking care of the trim yourself, make sure you have someone down on the ground to look up the trim for you.


Always remember to wear gloves when working on any kind of housing project. Wearing gloves is the best way to ensure that your hands won’t get cut up or injured during the installation of metal roofing. Another thing to note is that you shouldn’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.