Minimum Slope For Flat Roof South Africa

Flat roofs are a popular choice in regions where the climate does not lean toward snow or heavy rainfall.

Minimum slope for flat roof south africa.

Flat roof designs in south africa are often constructed from corrugated metal fibreglass sheeting or concrete. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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. In general the minimum slope for a flat roof is 1 0 but as stated earlier this is only possible in theory.

As such roof slope requirements are very flexible with many houses having very low to very steep slopes. Although flat roofed houses are very popular in south africa it is important to remember that a flat roof still requires a slight pitch for water drainage. It is important to do an annual inspection as south africa has a very harsh climate. A minimum gradient of 3 5 degrees is recommended depending on the roof material.

This is the basis for calculating the angle which is approximately a 1 19 degree slope. For instance flat roofs are not actually flat they must have a fall of about 1 50. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The overhang of the roof at the wall is called the eaves.

A roof must have some slope in order to shed rainwater. A roof with a slope of less than 15 is classified as flat note that a minimum gradient of 3 to 5 is needed. Flat roofs are an issue all on their own. 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.

It is more accurate to describe such a roof as semi flat. Being a durable material means that metal roofs do well to endure fire and wind damage. 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 is by far one of the most preferred roof material choices in south africa especially in suburban.

Asphalt shingles continue to be the most widely installed roof covering option in north america.