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