Thames & Kosmos Green Engineering: Clean Energy & Sustainable Living handleiding

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Handleiding

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You will learn about

another advantage

in the next

experiment!

2626

Green the roof

with grass

You will need

– Assembled model house

– Ryegrass seed packet

– Nano-adhesive pad

– Green roof plastic tray

– Cotton pad

– Water

– Spray bottle

Here’s how

1. Place the cotton pad in the green roof plastic

tray. If you have not already, use the nano-

adhesive pad to secure the tray to the roof of

your house. The pad will allow you to remove

the tray for cleaning and stick it back on.

2. Moisten the cotton mat using a spray bottle

or by carefully pouring some water onto it.

Be careful not to wet the house or the

electronic parts.

3. Sow the grass seeds from the seed packet

evenly on the cotton mat. Spray the seeds

with water or carefully water them.

Caution: The seeds can easily be washed

away by too much water.

In order for the grass to grow, the house

must be in a bright and well-ventilated place.

Never let the seeds and the cotton mat dry

out.

5. After a few days, the seeds should start to

germinate. You can let the grass grow for

one to two weeks, and even trim it back with

scissors. If it dries out and turns yellow or

you notice mold, throw it in the trash along

with the cotton pad.

Your grass grows on a thin cotton pad that does not provide

the grass with any nutrients. Therefore, the grass turns

yellow and dries out after a few weeks. A real green roof is

underlaid with many dierent layers, including a protective

ﬁlm and substrate such as pumice stone, which supplies the

plants with nutrients. A green roof can include various

plants, not just grass.

A green roof has many ecological advantages: For

example, it oers insects and small animals a home, which

is particularly useful in cities without many green spaces.

Green roofs also ﬁlter dust and pollutants from the air and,

at the same time, insulate from heat, cold, and noise.

EXPERIMENT 8:

GREENING THE ROOF

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