Your questions

Below is a selection of frequently asked questions that we receive in relation to maintaining a sedum green roof. If you have a question that is not listed below please contact us on 0845 271 8800 and we will get a member of our expert team to assist you. 

Do I need to maintain my sedum roof?

Yes. We recommend maintenance should be carried out at least once a year for sedum roofs. Maintenance promotes healthy sedum growth and reduces the chance of weed.

What do I need in respect of access and health and safety for maintenance to take place on my roof?

Safe access to the roof is key. Without safe access Bauder cannot maintain the roof.

The pebble stone edge is full of sedum, is that ok?

As part of the maintenance visit, gutters and drainage channels will be checked, and if required cleared or sprayed, to assure good drainage is occurring on the roof. This is paramount to the health of a green roof. 

My sedum roof is bare, what is wrong?

There are several possible causes: sedum like all plants need feed and water if the plants have struggled for a prolonged period of time the plants shrink back and their leaf size is reduced, eventually this can cause bare areas. Sedums are not like grasses and do not take kindly to trafficking. 

Do I need to irrigate my sedum roof?

Initially to bed in the green roof and allow for healthy establishment surface watering is required for the first 6 weeks. This is particularly crucial if installation coincides with the spring / summer months. Treat the roof as you would a freshly laid lawn. Evening or early morning watering every other day, watering the roof to saturation point (wet to the touch). Following this establishment period irrigation becomes project specific and something that should be discussed at the initial stages of the green roof conception.

My sedum roof has lots of grass/weeds - what is wrong and what can I do?

Weeds can and do occur from time to time on green roofs. Normally the sedum is a dense mat of plants and there are only limited room for grass / weed to establish.  Sedum is very drought tolerant and should over a number of years remain the dominant plant species, however in very wet summers and warm winters grass can establish. Regular removal of weeds by hand during annual or biannual visits should prevent weeds becoming invasive.  

What is the cost of Bauder Maintenance and how do I go about getting a quote?

Please contact Bauder by email: or call 0845 271 8801An idea of the approximate area, pitch and type of roof would help us in producing more accurate quotation. 

Do I need to feed / fertilise my sedum roof?

Yes we recommend a feed once a year, which would be part of the maintenance contract. 

My sedum roof looks dead / red, what is wrong?

When sedum is stressed in cold or dry weather it can give a ‘reddish’ appearance, this is quite normal and it should recover. In some situations it may signify that the roof is in need of nutrition or irrigation. Also remember that some sedums are deciduous (meaning they will lose their leaf in the winter), these sedums should recover fully in the spring. 

My sedum roof has lots of moss - what can I do?

Moss can occur on a green roof, do not worry. Generally the wet winter weather will encourage moss whilst warm dry weather will allow the sedum to “out compete” the moss. The British weather can mean the amount of moss will vary. If however moss has become invasive then there may be other issues: over-hanging trees, shade from buildings or poor drainage. As part of the Bauder Maintenance service we can treat the moss if required.