FEATURES
Correctly installing a roof , can greatly save on costs . Image : Homeless Turtle Sanctuary
FIXING THE ERRORS
Leaks , roof moisture and fungus are the most visible consequences of improper maintenance . Poor insulation promotes heat from escaping through the layers of roofs leading to leaks and flooding from rain . This process becomes detrimental to the roof and leads to deterioration and destruction of the membrane , flashings , gutters and downspouts .
Each type of roof should have carried out calculations of temperature and moisture . The aim is to not only select the correct thickness of thermal insulation , but also eliminate the possibility of condensation between the layers of the roof and eliminate conditions conducive to the growth of mould on the ceiling and walls on the inside . These calculations consider the space around windows , skylights , roof hatchways and so on . These are the places where moisture frequently occurs and are favourable conditions for mould growth . With inadequate ventilation , steam and moisture within the layers cause separation and can be seen visually on the ceiling and wall in the form of streaks and peeling paint coating , which are signs of weakness in a roof ’ s waterproof seal .
Waterproofing on every roof , regardless of its function , is crucial . The most common cause of leaks is due to errors by the contractors , such as lack of knowledge of the technologies used and a lack of a qualified team of employees .
A common mistake is to use alternatives or materials other than those provided by the manufacturer or chosen and described in the project documentation . The resulting ‘ saving ’ for the difference in price of material is usually superficial and disproportionate to the cost of any subsequent repairs .
Well designed and insulated homes that use insulation that meets the South African requirements will give all year comfort .
SAVING COSTS
• 45 % on cooling and heating energy can be saved with roof and ceiling insulation
• 20 % additional cooling and heating energy with wall bulk insulation
• 5 % on winter costs with the right floor insulation used in your home
Source : Home Insulations
Source : Home insulation , Alta Roofing and Waterproofing
22
MAY - JUNE 2017
AFFORDABLE
SA HOUSING