Home » Installation

Installation

Installation

Installation of a green roof is relatively simple and for both our sedum vegetation blankets and sedum Click n' Go Trays. We work with a network of installer across the UK & Ireland and if necessary we can put you in touch with them should you require their installation services.

Let's show you how to do it...

What type of product are you installing?

Sempergreen® Lightweight system

Our Sempergreen® Lightweight System is our most popular and versatile sedum roof and offers 95% coverage. The below steps will guide you how to safely install your new green roof, you will also find links to the accessories you will need for the installation.

Clean the roof

Clean the roof and remove dirt, waste or other materials. Check that the roof covering is not damaged, to make sure that the roof is waterproof.

Install root barrier foil (optional)

If the roofing is not root-resistant, it is necessary to use a root barrier foil. Apply the root barrier foil in the direction of the arrow. Also cover the raised roof edge. Make sure the foil joins well by means of an overlap of 50 cm.

Items you'll need: Root barrier foil

Apply drainage layer

Roll out the drainage sheets to the roof edge, perpendicularly over the root barrier foil (see the direction of the arrow). If necessary, prepare the cutting of the drainage to size on the ground or take measures to cut safely. Never cut directly on the roofing.

Cut a piece out of the drainage layer at the location of the rainwater downpipe(s). Cover the rainwater downpipe with a wire balloon guard, leaf trap or inspection pit.

Items you'll need: Drainage profiles | Drainage

Apply separation profile

The separation profile serves as a separation between the green roof and the gravel strip. Place the profile at least 20 to 30 cm from the roof edge, with the base on the side of the gravel strip.

Items you'll need: Separation profile

Apply substrate roll

Roll the substrate roll perpendicularly over the drainage rolls (see the direction of the arrow). Ensure that the substrate roll joins well without overlap. Completely saturate the substrate roll with water before installing the vegetation mats.

Items you'll need: Substrate roll

Apply vegetation blankets

Carefully roll out the vegetation blankets perpendicularly over the substrate roll (see the direction of the arrow). Start with the end of the vegetation blanket on top. Carefully roll the end of the blanket back and make sure it is in the correct position at the start of the track. If necessary, cut or saw the blanket to the right length.

Tip: use a sturdy serrated knife or saw. Make sure that the vegetation blankets join well without overlap. Any bare patches can be filled with residual pieces of the vegetation blanket.

Apply gravel

Apply the gravel between the green roof and the roof edge. Bring the gravel layer to the same level of the green roof.

Items you'll need: Gravel

Irrigate

Water the vegetation blankets immediately after installation, until the substrate roll is completely water saturated. This is necessary for the rooting of the vegetation blankets in the underlying substrate layer. Water the green roof regularly when the roof is installed during a dry period.

Maintenance and fertilization

The maintenance and fertilization advice for a Sedum roof can be read in the document Maintenance advice Sedum roof.

Sempergreen® Click ‘n’ go Sedumtray

Our Sempergreen® Click ‘n’ go Sedumtray is a ready-to-use tray designed to be positioned directly onto a roof, providing immediate green results. You will need a range of accessories to ensure your roof installation goes as smoothly as possible. 

Clean the roof

Clean the roof and remove dirt, waste or other materials. Check that the roof covering is not damaged, to make sure that the roof is waterproof.

Apply root barrier foil (optional)

If the roofing is not root-resistant, it is necessary to use a root barrier foil. Also cover the raised roof edge. Make sure the foil joins well by means of an overlap of 50 cm..

Items you'll need: Root barrier foil

Apply protective cover

Roll out the protective cover up to the roof edge and cut to size. Make sure that the cover joins well by means of a small overlap. Cut a piece out of the root barrier foil and protective cover at the location of the rainwater downpipe(s). Cover the rainwater downpipe with a wire balloon guard, leaf trap or inspection pit

Place the first Sedumtray

Place the first Sedumtray on the roof. Start in the corner and keep about 20 to 30 cm from the roof edge.

Place the following Sedumtrays

Cover the entire roof with the Click ‘n go Sedumtrays. Place the next tray a quarter turn against the previous one. This way the trays will exactly fit together

Customize (optional)

If the roof cannot be completely covered with whole trays, the trays can be cut to size. Determine the correct size and saw through the tray.

Apply gravel

Apply the gravel between the green roof and the roof edge. Bring the gravel layer to the same level of the Sedumtrays.

Items you'll need: Gravel

Irrigate

Water the green roof immediately after installation. Water the green roof regularly when the roof is installed during a dry period.

Maintenance and fertilization

The maintenance and fertilization advice for a Sedum roof can be read in the document Maintenance advice Sedum roof.