Although Asphalt Roofing shingles are pricey, they are made from common and readily available material: non-volatile part of crude oil and limestone aggregates. In Kenya they are imported from overseas by authorized dealers and roofers in Nairobi .A shingle is usually rectangular, flat and flexible and is installed by laying this pieces on the entire outer surface of a roof deck. According to shingle experts Iko Inc. one piece of their asphalt shingle measures 1038 mm by 349 mm and weighs approximately 11.6 kg per square meter.Embed from Getty Images
Shingle roofing is recommended for use on roof slopes of between 15 and 85 degrees. But the latest information coming from Iko Inc. claims with concrete evidence, that this limitation do not apply to the newly released Cambridge xtreme shingles. In a few words, this new product can be installed on roof slopes that range from 9.5 and 90 degrees. Meaning, they s can be deployed on not only flat but also on pitched roofs as well as vertical roofs or walls for that matter .Cambridge xtreme is said to be watertight, durable and strong with a capacity to ride out 22 km/h of winds and 60 mm/h of rainfall.
Shingle like steel roofing tiles come in a variety of colors depending on the vendor. For example at Iko Inc. you can choose from either harvard slate, dual black, autumn brown or riviera red.
Here is how to apply the shingles on your roof
First the roofer will have to erect the support structure that consist of the ceiling joists , the rafters, the ridge and so on . Then he will construct a roof deck, made of plywood or wooden board that are exterior grade and without any warping defects. Proper ventilation in the roof must be provided for, to allow air to circulate between the deck and the insulation layer that is usually fixed next to ceiling board. Ideally the air should enter through the soffit & eaves and evacuate through an outlet in the roof ridge. For example Iko Inc. recommends Armourvent Mult that requires the roofer to use plastic cement and end caps. Also Iko Armourvent Sanitary – is ideal for bathroom and kitchen because it has the capacity to remove humidity from the room even when it is raining.Embed from Getty Images
Once the deck is complete, the roofer has to install the underlayment-in other words an inner layer. Experts recommend that the roofer should installs a self-adhesive underlayment, parallel to the eaves.
On the heels of the inner layer, the starter course is laid which for instance could can be Iko Inc. starterStrip or 3-tab super-glass shingles. Asphalt plastic cement should be used to glue the starterStrip onto the underlayment.
What follow here after is the installation of the first, second third courses of asphalt shingle pieces and even more depending recommendation of the vendor and building regulation in your jurisdiction. The shingle are fastened onto the roof by driving the nails straight into the deck with a hammer. Ideally the roofer will use 4 nails per shingle placed in the nailing lane, roughly 25 cm and 33 cm from each end. For maximum protection of the shingle from wind driven rain they should be cemented at the edges.
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Sources: http://www.iko.be ; Iko incorporated- the shingles experts.