If you want to create a green roof in your home, then one of the first things that you need to consider is whether or not your roof structure is going to be able to hold the additional weight. Not only the soil and drainage layers that you will need to install, but also the additional rainwater that will be soaked up within the soil too.
You also need to ensure that your roof is on a slight incline, which means that any water will drain down as well as draining through the soil. Most flat roofing is never truly flat, because of this necessity and to avoid pooling of water on the roof deck. When this happens with traditional roof coverings, such as felt, it can lead to damage as standing water sits over time, dries out and cracks the felt.
It is recommended that a structural survey is carried out before any work takes place to make sure that the roof deck has the integrity you need. If it does not, there is still the option to make the structure safe before all the drainage layers, soil and planting is added.
Once you know that your roof is going to be able to hold the weight, and is at the right level of incline, then you can start to think about installing your green roof. You need to use a waterproof membrane that is able to protect the actual hardware of your roof from any of the water that will soak through.
A fantastic choice is EPDM membranes. They are designed to not only be fully waterproof, but also durable and resilient too. This means that it will be a hard-wearing layer that will not need to be replaced too soon. The waterproofing layer is arguably the most important, as this will protect the roof deck and the interior of the building. It must be noted that a sensible protecting layer covers the EPDM membrane before the first gravel drainage layer is installed, to avoid puncturing the membrane.
EPDM membranes are not only durable and long-lasting (with an expected lifespan of more than 50 years, but they are also easy to install, this means that even those who are not usually used to carrying out DIY projects can install their very own green roof with ease.
We love the idea of a green roof, not only is it going to help the environment, but it also looks beautiful too. Something that we all hope to achieve with our homes.