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There are various aspects that decide which type of roof to use for your property.
CLIMATE
In hot desert-like climates the place rainfall is minimal, flat roofs are really widespread. Places such as North-Africa have a good deal of these roofs.
A flat roof is not specifically 'flat'. It normally slopes at an angle of 5 to 10 degrees. This angle can not be observed very easily and assists to drain water during cleaning or soon after rainy weather.
In classic African societies, communities living in Arid locations of Kenya this kind of as Maasai, Samburu had their shelters produced of flat roofs. This is due to the fact rain is not widespread in these locations.
In rainy climates, the roof turns into steep. In snowy areas such as Northern Europe, the roof is very steep [over 45 degrees] so as to drain away snow. In conventional African societies which dwell in rainy regions this kind of as Kisii, Mount Kenya and Coast, the thatch roof is really steep [over 60 degrees] so as to enhance the surface runoff of rain water.
Cost
Roofing materials fluctuate depending on the price range.
In Kenya, thatch roof is the most affordable at KES 180 per square meter.
It is followed by Iron sheets. The thinnest grade in the market at the second is Gauge 32 which charges about KES 210 per square meter. Gauge 30 costs about KES 240 per square meter and Gauge 28 pre-painted charges about kes 500 per square meter.
Concrete roofing tiles expense around KES 400 per square meter.
Clay roofing tiles cost close to KES 630 per square meter at Mombasa. These have the advantage of becoming light-bodyweight and since they are manufactured of normal clay with no added paint, their rain-water runoff can be consumed with no any overall health concerns as compared to the others which have paint. Paint includes Lead which is damaging to the human body.
Stone coated steel roofing tiles this kind of as Harvey, Decra are in the variety of the most pricey and value around KES 1500 per square meter. These are typically gauge 26 in thickness and hence give a lifetime assure. Their light bodyweight also provides savings to the timber supporting trusses which will be much less than when supporting heavier concrete tiles.
THEME Design and style AND Form OF THE ROOF
Curved and cylindrical roofs demand specific varieties of resources such as copper and bituminous felts. These felts can take the form of the roof very easily.
Copper felt is expensive. This is generally copper in colour when new and turns greenish as it ages.
Hipped roofs are ideal laid using tiles because with tiles, there will be significantly less cutting and therefore less wastage. Some steel roofing suppliers in Kenya can provide curved roofs. Gable roofs can be carried out making use of any kind of roofing merchandise.
Some buildings this kind of as Highlands restaurant at Afya Centre, Nairobi have glass roofs. These give great views but are costly to put up. A square meter of 10mm structural glass costs about kes 2,800.
The steepness of the roof can also be used to control value. The far more steep the roof, the far more the surface region and therefore the more the expense. Some roofing tiles such as Mangalore design and style need steep roofs to make sure that the rain water surface runoff is fast and consequently no leakages.
Recreational amenities such as tourist lodges which need rustic normal finishes will opt for the thatch roofs which can be patterned to a variety of designs.
Frank Gichuhi
Architect.
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