Minimum Slope For Flat Roof South Africa

Flat roof designs in south africa are often constructed from corrugated metal fibreglass sheeting or concrete.

Minimum slope for flat roof south africa.

It is by far one of the most preferred roof material choices in south africa especially in suburban. This is the basis for calculating the angle which is approximately a 1 19 degree slope. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. As such roof slope requirements are very flexible with many houses having very low to very steep slopes.

The first two are constructed with a slight slope to allow water to run off but the flatter a flat concrete roof is prone to leaks unless properly maintained. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 7 types of roofing for south african homes. A minimum gradient of 3 5 degrees is recommended depending on the roof material.

It is more accurate to describe such a roof as semi flat. The overhang of the roof at the wall is called the eaves. Being a durable material means that metal roofs do well to endure fire and wind damage. Flat roofs are a popular choice in regions where the climate does not lean toward snow or heavy rainfall.

Asphalt shingles continue to be the most widely installed roof covering option in north america. So in reality flat roofs are never totally flat but rather have a slight fall the minimum of a flat roof is 1 50. It takes the manufacturer s recommendations the unique conditions of the roof as well as the skills and the expertise of the installer to arrive at the right slope. A roof with a slope of less than 15 is classified as flat note that a minimum gradient of 3 to 5 is needed.

In general the minimum slope for a flat roof is 1 0 but as stated earlier this is only possible in theory. A roof must have some slope in order to shed rainwater. Part l of the updated national building regulations published in 2011 also include new sections on roof coverings and waterproofing systems for pitched roofs and drainage and waterproofing of flat roofs. For instance flat roofs are not actually flat they must have a fall of about 1 50.

Flat roofs are an issue all on their own.