Flat Roof Addition Mistakes to Avoid

A flat roof addition is a very popular DIY project which can be used to expand the useful space in your home. There are, however, lots of common mistakes which many people make. These mistakes can be very costly and are best avoided wherever possible. Flat roof addition projects are actually very simple, you just need to make sure that you have all of the right tools and materials to complete the project successfully.

Not Sloping the Roof

A flat roof isn't actually completely flat, there should always be a slight pitch to a flat roof which will allow the water to run off. Flat roofs without a slope will cause water to pool and collect on the surface of the roof. Any water which collects on the roof can cause damage. It can also leak between the joints of the roofing material and cause water damage to the inside of your home.

Not Allowing for Drainage

Unlike a pitched roof, a flat roof will not be able to get rid of all the water from the sides of the roof. Adequate drainage needs to be installed to deal with this water. If water is allowed to sit on the roof without proper drainage then it can cause leaks and could ultimately cause the roof to fall down due to the weight. Drainage will deal with this water before it causes any harm to your roof.

Not Dealing with Leaks

Almost all flat roofs will leak at some time in their life and it's not normally something that you can avoid. However, you must deal with leaks as soon as they occur to minimize their damage. Don't leave any leaks to see what happens, there's no chance that they will fix themselves.


Flashing is an important feature of any roof to waterproof it. Flashing is made from lead and fixed around the edges of windows and roofs. If you don't have any experience flashing roofs then it's probably not a good idea to start trying to flash a flat roof. The flashing on flat roofs is very difficult because it must be able to withstand the pressures of water standing on the roof. It's essential that the flashing is of a high quality, poor quality flashing can be one of the biggest problems to affect flat roofs.

Not Getting Help

If you don't feel confident to carry out the work on your flat roof yourself then you must ask for assistance. Trying to complete the project yourself if you don't feel like you will be able to will be a huge mistake. By getting the help that you need to complete the project you will find it much easier.

Choice of Coatings

You must choose the coating for your flat roof depending on the type of area you live in. Using epoxy resin in a humid area can actually result in tearing the roof apart if you're not careful. This would create leaks and expensive problems.

By learning about these mistakes you will be able to avoid wasting too much time or money on various parts of the project.