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How much does Flat Roofing Installation cost?

Average Price
$3,000 - $9,000

What is the price of Flat Roofing Installation?

Are you thinking about hiring a roofer to install a flat roof on your property? Read our handy guide to find out how much you can expect to pay for flat roofing installation in the US.

What is Flat Roofing Installation?

You might be looking for a replacement roof for your home or garage, or a new roof for your extension. Whatever you’re planning, a flat roof is often an appealing option.

Flat roofs are typically one of the cheapest types of roofs, making them a popular choice amongst both builders and renovators. By hiring a professional roofer, you can rest assured that your flat roof is properly installed, reducing the chance of problems occurring.

We’re going to let you into a secret. Contrary to popular belief, a flat roof should never be completely flat. Flat roofs should be slightly angled to allow rainwater to escape into gutters or outlets and to avoid pooling. This will give your flat roof the best possible chance of achieving a long life.

How much does Flat Roofing Installation cost?

Hiring a professional roofer will help to ensure that your flat roof is installed to the highest standard, reducing the chance of repairs being required later down the line. But how much can you expect to pay for flat roofing installation in the US?

The cost of installing a flat roof will depend on the size of the area that needs roofing and your location. Although there is no fixed rate for installing a flat roof, a breakdown of average costs for flat roofing installation is given below.

Average cost of Flat Roofing Installation
Average cost$5,500
Minimum cost$3,000
Maximum cost$9,000

What changes the price of Flat Roofing Installation?  

The price you’ll be quoted for flat roofing installation is dependent on several different factors including:

  • Roof size

  • Specification

  • Location

Roof size

The cost of installing a flat roof on your property will depend on the size of the roof you require. For example, a flat roof for a single garage could cost $3,000 whilst a flat roof for a three-bedroom house might cost $9,000. In general, the bigger the roof you require, the higher the price of flat roofing installation will be.


The specification of your flat roof will have an impact on its cost. For example, you’ll have the option to specify the thickness and type of both the roofing membrane and the insulation. Certain options will come with a higher price tag, based on their cost and quality, whilst others will be cheaper.


Your location will also influence the cost of flat roofing installation. The price of hiring a roofer varies between different states. Prices are also typically higher in cities such as Chicago, Seattle and Atlanta, whilst prices in more rural areas may be lower than the average. However, the prices quoted should still fall within the average price range.

How to reduce the cost of Flat Roofing Installation

If you’re working on a tight budget, there are a few things that you can do to reduce the price of flat roofing installation.

  • When you request a quote from a roofer, you’ll be given options for the type and thickness of the roofing membrane. Generally speaking, the thicker the membrane, the longer it will last. This membrane often comes with a warranty. You can reduce the price of your flat roofing installation by choosing to go without the warranty, or opt for a shorter warranty.

  • If you’re replacing an existing flat roof, one of the easiest ways to minimize your costs is to recover the existing flat roof. This will speed up installation whilst reducing labor costs and minimizing disruption.

  • You’ll also need to think about how much insulation you need. You can improve the effectiveness of your insulation by opting for two thinner layers of roof insulation instead of one thicker layer. This will improve the R-value performance along with reducing air leakage. This will help you to keep the costs down as you can get the same performance with less insulation.

You’ve decided to opt for flat roof installation, but where should you start with hiring a roofer? We’re here to help. When you search for a roofer on Bark, you can browse the profiles of companies that meet your requirements and read reviews from genuine clients before requesting a quote. 

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