Ensuring that the roof terrace is watertight and properly maintained is the responsibility of the co-ownership. The roof terrace is a common part of the building. It is therefore the responsibility of each individual homeowner. However, it can be difficult for individuals to determine the right insulation and waterproofing methods for this type of roof. For optimum protection, a protective membrane can be applied. To optimize the condominium's energy bill, you can turn to the application of a cool roof coating.
The condominium's responsibility for waterproofing the flat roof
In France, the roof terrace is considered a common part of the residence. The co-ownership is therefore liable, although there is no legal obligation to do so.
Owners are responsible for ensuring that the roof terrace is maintained on a regular basis, by removing waste and ensuring that it is watertight. To do this, it's essential to know how to waterproof a roof terrace sustainably and in compliance with current standards. Faulty maintenance or treatment can lead to infiltration of the roof terrace, with significant financial consequences for the co-ownership.
Good roof terrace insulation methods
To ensure the watertightness of the flat roof is guaranteed for the condominium, it's best to turn to an appropriate insulation method.
In the case of flat roofs, there are several applicable methods. One of the most popular insulation solutions is the EPDM membrane. Deposited over the entire surface of the flat roof, this membrane, made from plastic components, guarantees excellent watertightness at a controlled cost.
Membranes in other materials, such as PVC, are also available. It is also possible to insulate your roof terrace with a bituminous solution. The choice of roof decking will depend in particular on the nature of the substrate, exposure to the sun and how often the surface is used.
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The role of the roof terrace in a condominium's energy bill
Whatever insulation method is chosen, the flat roof will always play a central role in the condominium's energy bill. Particularly during peak periods, the interior temperature is directly influenced by the sun's rays on the roof.
To avoid high air-conditioning costs and possible discomfort caused by extreme temperatures, it's smart to combine flat roof insulation with cool roof cladding. Cool roofing is a solution used on flat roofs to reduce the impact of the sun's rays.
To achieve this, a white heat-absorbing paint is applied to the entire surface of the chosen insulation or membrane. Thanks to its reflectivity, it will reflect the sun's rays, greatly reducing interior temperatures in hot weather. Thanks to the combined action of the insulation and the cool roof, the condominium ensures that the roof terrace is watertight and insulated.
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