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Choosing the best roofing material can be easy when your garage is attached to your house. But how do you decide when you have a detached garage? Do the same rules apply for durability? If your detached garage is built differently than your house, does that mean it needs a different roof? This article will cover the most durable roofing options for your detached garage.


As one of the most effective materials on the market, metal can last up to 50 or more years on your detached garage. Another thing to consider is what you’re planning on storing in your garage. Are you storing items that are flammable or hazardous, such as paints, fuels, oils or materials that give off fumes? If so, you can still use metal, but you have to check the flammability of the metal/s in question.

If you would prefer to have your detached roof match the style of your house roof, you can still use metal for the job: some metals can look like cedar, slate tiles, or even asphalt shingles. Keep in mind that if you do want to use metal and keep it styled with your house roof, it might be more expensive.

Thermoplastic Polyolefin (TPO)

Is the roof of your detached garage flat or with a low pitch? If so, thermoplastic polyolefin (TPO) is one of the best options for your detached garage. TPO is a great option for protecting against rain and tough elements, and can perform for up to 40 years. Not only is TPO one of the strongest roofing materials, it is also one of the most energy saving single-ply roofing membranes.

TPO often comes in lightly-colored appearance, which can reflect UV rays and heat during hot months. This results in decreased energy usage and keep your detached garage cool.

Modified Bitumen

Another durable option for flat detached garage roofs is modified bitumen, an asphalt-based material. On average, modified bitumen lasts up to 15 years and provides a darker and more traditional appearance than TPO. It also creates a more cohesive look and is full of minerals to serve as a durable shield for your garage. Installing modified bitumen to your detached garage roof can be a labor-intensive process that is normally installed in multiple layers.

Contact our Roofing professionals

At Exterior Remodel & Design, Inc., our roofing professionals are dedicated to providing in-depth roofing inspections, repairs, and installations to maintain optimal roofing durability. Contact us for a quote or to schedule an appointment.