How To Grow Grass On A Flat Roof

Plant the grass seeds.

How to grow grass on a flat roof.

Turf is also heavy and the garage roof s joists were not particularly robust. Though i couldn t emulate the thrushes i could plant a sedum roof instead of grass. A properly watered lawn is crucial to growing grass. Spread 1 inch of gravel on top of the soil to improve drainage.

Draining and root stopping 1. Roof gardens can be windy places we sand the grass with kiln sand once it is installed remembering to place more around the edges to prevent flapping from the wind. Suitable waterproofing root barrier drainage and filter layers are necessary. Use a sprinkler or hand sprayer with a mist setting to avoid washing away soil and seed.

Soak the soil 4 to 6 inches deep immediately after seeding. Lattice fencing can also be used as a windbreak. An all purpose soil less peat free potting mix is fine for growing herbs and other edibles but mix in plenty of perlite to both improve drainage and save on weight. Protect your lawn use a wind blanket and cover the roof to protect your grass seeds.

Now comes the growing medium which for a sedum roof should be at least 8cm 3in deep and for a roof of wildflowers herbs salad and strawberries at least 15cm 6in deep. Roll over the root membrane. Hand weeding watering and feeding are all necessary and it may sometimes be necessary to replant areas that have failed. Pour on the bags of gravel your looking to get just a single layer cover over the entire roof 2.

For new seeds a gentle approach is key. Purchase an underlayment system from a green roof dealer. On a visit to ben law s woodland workshop one spring i was impressed by the yellow flowering sedum cascading down the roof and the nest of baby thrushes in the eaves. Growing grass on your rooftop requires at least 6 inches of growing medium held in place with a border made of wood or other lightweight material.

Choose seeds that are the best suited for the area where you live. Next step is planting the grass seeds. Brush into place 3. Use topsoil on your roof and you could easily.