Pros and cons of a flat roof

Here is what to consider if you are looking to build, buy, or already own, a house with a flat roof.

Pros:

1. Flat roofs are generally less expensive initially, to construct given the reduced areas involved.

2. The construction period is often shorter compared to traditional pitched roofs given their simpler style.

3. Access is broadly easier.

4. Internal space is not imposed on given reduced roof pitch angles.

5. Flat roofs are often considered more contemporary, aesthetically, than pitched roofs.

Cons:

1. Flat roofs generally require a greater degree of maintenance – even more so if the surface is disturbed and damaged by people frequently walking over it.

2. Flat roof drainage is historically not as effective as traditional pitched roofs and standing water (ponding) can be an issue if falls are not adequate.

3. Typically, the life span of a flat roof is not as long as a traditional pitched roof – even less so if it is vulnerable to damage (points 1 and 2).

4. Successful sealing of flat roofs from water ingress can be problematic if not correctly executed.

5. Roof repairs are generally more expensive than traditional pitched roofs. The need for higher level of maintenance and more frequent and possibly serious repairs can only add to this.

Note: Regardless of size, if you choose a flat roof,  brace yourself for additional expenditure.

Source: Castle