Installing and Maintaining a Green Roof: How Much Does It Cost?

Green roofs are growing in popularity year-on-year as awareness of green spaces grows in urban areas. As more grassland and fields are replaced by houses and flats, green roofs are a simple and effective way to make sure that nature still has somewhere to excel.

Thanks to innovations in green roof tech, such as the modular green roofs from Wallbarn, it is now cheaper than ever to install and maintain your own green roof. There are a few different options to choose from, including whether you want a roll-out or modular roof, the type of plants you’d like on the roof, and whether you want a biodiverse or intensive green roof.

Costs of Installing a Green Roof

There are two main methods of installing a green roof – rollout and modular. The initial costs of installing a green roof involve getting the substrate ready to be turned green. Wallbarn supplies everything you need to install a green roof when you purchase from their range.

The rollout range is a cost-effective and simple green roof to use on flat roofs. Each element is delivered and then installed separately. The materials are lightweight and easy to maintain – it’s a standard green roof for almost any situation.

If the roof is smaller or harder to access, like on extensions or industrial/commercial buildings, the modular method makes it easy to customize an exact shape. Delivered in pallets with matching blocks, they’re easy to install and come with excellent drainage.

Keeping Costs Down With Easy To Install Roofs

Recent innovations in green roof tech make it much simpler to install the roofs, meaning installation costs and labour costs are much cheaper than in the past. Materials continue to decrease in price as the demand for green roofs increases. Installing a healthy and natural green roof is well within your budget!

Modular Green Roof

Take Wallbarn’s Modular M-Tray roofing for example. Like a giant jigsaw puzzle, where all the pieces are the same shape, all you need to do is click each module together. Over the course of a few days, they form a seamless green roof with great drainage. This form of green roof works best in hard-to-reach places – rather than pay for a specially-shaped green roof, you can use the modular pieces to create an exact roof.

Rollout Green Roof

This is the classic form of rollout roof, and although it sounds a little like astroturf you might install in your back garden, a rollout roof actually has several different layers which need to be laid before the seedbeds. It’s an extremely lightweight form of green roof with low maintenance costs. Once installed it should naturally look after itself with minimal watering needed.

Green Roof Maintenance Costs

One of the best things about green roofs is that they need minimal maintenance. Seedbeds and types of plant are specifically chosen so that they respond well to British weather conditions and don’t grow too wildly out of control. While some occasional maintenance might be required, as well as watering during the first few weeks of installation, your green roof will mostly look after itself.

Both rollout and modular green roofs are designed for optimum drainage. One problem with older green roofs is that, over time, the drains become blocked by vegetation growth, causing water to damage the deck and run down the walls of your home. Wallbarn has taken huge lengths to improve its drainage to effectively futureproof its green roofing.

Rollout vs Modular

While rollout is lightweight and cheaper than modular to initially install, it is much harder to carry out general roof maintenance to decking when using a rollout roof. Removing tonnes of soil and plant-life to access the decking underneath can rack up quite a cost. Modular roofs from Wallbarn can be easily removed segment by segment, making it much simpler to access the decking underneath.

Green Roof Maintenance Schedule

Green roofs are still living parts of nature and will require a maintenance schedule to match that of your own garden. Certain seedbeds, like sedum, require less maintenance than grass roofs, but both will require looking after over the course of the year.

In general, much of this maintenance can be carried out by yourself, especially if the roof is easy to reach. Pulling weeds out by hand, fertilizing the soil during the Spring, and making sure that areas that look a bit sparse are reseeded, are a few examples of necessary maintenance. These are low-cost and won’t take much time – it’s like looking after your garden!

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