Sedum roof VS Wildflower roof

office building sedum roof

Considering a green roof system? Not sure whether to install a sedum roof or wildflower roof?

It is a common question for anyone investigating green roof systems. Both types of green roof have pros and cons. So which one should you choose?

 

Many factors should be considered when installing a green roof system:

Maintenance -

Both sedum roofs and wildflower (Biodiverse) roofs require maintenance. However wildflower roofs will require much more maintenance due to their large variety of plants and the types of plants used. Whereas sedum is very low maintenance, biodiverse roofs require feeding, irregation and more labour intensive maintennce.

Appearance - 

Sedum is hard wearing and draught tolerant plant which offers colour all year round. Sedum is aesthetically pleasing, as is wildflower roofs. Wildflower roofs offer a varied mix of plant species (some do die back over winter). However local wildflowers can be incoporated into the green roof to enkeep with the surroundings.

Weight -

Wildflower roofs will require a deeper substrate to hold more nutirents. Sedum is very versatile in extreme weathers and can serve easier in shallow substrate. Therefore when installing a wildflower roof, the roof weight limit must be considered to make sure the roof when hold the wildflower roof when fully saturated. A green roof with a weight of 30 kilo/m2 generally consists of only Sedum vegetation, while a green roof with a weight of 220 kilo/m2 consists of biodiverse wildflowers.

Wildlife & habitats -

Sedum roofs and wildflowers roofs both provide much needed habitats and food for wildlife and insects. However wildlfowers can attract a wider variety of wildlife and bees.

office building sedum roof
Wildflowers Green Roof
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