Flat Green Roof Construction Details

Build a living roof green roof.

Flat green roof construction details.

This means you can consider a house green roof or growing a green roof on an extension or conservatory. For a wildflower roof with a 150mm depth of the substrate work on loading capacity of 250kg per square metre. Note that it is not like a traditional roof garden in which planting is done in free standing containers as well as planters that are placed on an easy to access roof terrace. Make a normal flat or sloped roof into a beautiful living garden.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. This will give additional stability to the roof structure. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. The construction of the flat roof is similar to that of the timber upper floor.

Regular intensive maintenance is required for this type of roof. The majority of green roofs both intensive and extensive are build from the following elements. A green roof is in ecological terms a great and simple thing to do. It replaces the ecology the new house sits upon thereby replacing the habitat that a house takes away.

While redeveloping our house we decided to install a living roof on our kitchen roof why you ask. A green roof is a green space that is created by adding various layers of plants and a growing medium to the top portion of a traditional roofing system. I liked the idea of having a bit more greenery in the property we live. Green roofs flat knowledge of green roof construction methods and the benefits of incorporating them in building design is steadily becoming more widespread in the uk.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Used over a whole roof a green roof will be the single overriding design influence on the house as well as impacting on the construction right down to the foundations. For additional stability you can also use steel joists that are built into one or both of the walls. Flat roofs are an easier option from a green roof construction point of view but living roofs are able to grow on pitched roofs too.

To support lightweight sedum green roof construction your roof needs a loading capacity of at least 120 kg per square metre. Slopes and angles for green roofs the pitch of your roof determines how fast rainwater runs off it. Rigid slab insulation must be strong enough to withstand the additional loads.