Advantages and Disadvantages of Flat Roof

Advantages and Disadvantages of Flat Roof

Are you looking for the best roof type for your home? Among the common roof types that you can choose is the flat roof. Before, many outbuildings and large commercial structures use this kind of roof. However, flat roofs are now becoming a popular roof type of modern homes. Many consider this roof as unique and also a risk. Because of its very low slope, homeowners are still hesitant of what it can offer. If you are considering this roof type, make sure you know the advantages and disadvantages of a flat roof.

Software Ad

Advantages of Flat Roof

1. It is cheaper.

A low slope or flat roof requires lesser materials. Therefore, overall material and labour cost are lower than a pitched roof. Installation of flat roofs is quicker and easier, leaving you more time and money for other repair works or items. Moreover, maintaining a flat roof is also cheaper because the materials used are also less expensive.

2. Easier for Inspection

One of the evident advantages is that flat roofs are easier to climb up on for inspection and maintenance. Although any roof should be dealt with care and caution, the flat roof surface is more stable than a typical sloped roof.

3. Easier Maintenance

Making repairs and cleaning gutters are less expensive and easier on the flat roof. Low slope and flat roofs are much more easy to clean. Therefore, it will last longer than other pitched roofs. With its advantage of being accessible, maintenance can be done more often.

4. More Space

Another major advantage of a flat roof is having more space for various functions. Many homeowners utilize their roof as gardens or a relaxation lounge. You can also have the roof as space for airconditioning units instead of having them use your space in the ground. Installing solar panels is also easier on flat roofs which will make it less obvious from the curb. You can also install skylights with ease.

5. Aesthetic Appeal

Flat roofs are often used in modern homes. Additionally, It can offer a minimalistic look and cleaner curb appeal. You don’t have to worry about the dirty roof as It cannot be seen from the curb.

Disadvantages of Flat Roof

1. Limited Materials

Due to its special needs in running off the water, you can only make use of limited materials such as:

  • Single-layer membrane roof: Neoprene, EPDM, PVC, Chlorinated polyethene
  • Modified bitumen roof
  • Built-up roof (BUR): Roofing felt and asphalt (built-up)

These materials are specially designed for flat roof and only a roofing specialist can install. You cannot opt for common materials such as metal, asphalt shingles and clay tiles.

2. Drainage Issues

One of the usual issues of flat roof over time is drainage. Flat roofs do not drain as efficiently as pitched roofs. Water tends to puddle and stay on the roof which can lead to leaks. Also, It can lead to the deterioration of roofing material. That is why homeowners must have a trusted and experienced roofing specialist to design proper and efficient drainage.

3. Installation Issues

Another issue that flat roofs encounter is the installation. Improper installation and process of sealing, coating of both the topcoat and underlayer is critical to the roof’s integrity. A flat roof is subject to regular leak testing to ensure that there are no leaks.


There are many Advantages and Disadvantages of Flat Roof. We suggest to carefully choose your roof as it is an important aspect in home design.

Back to blog

Leave a comment

Please note, comments need to be approved before they are published.