What are green roofs?

Green roofs or eco-roofs are the modern versions, and have many of the benefits of the ‘sod roofs’ that have been used in Scandinavia for centuries. Green roofs have risen rapidly in popularity, particularly in Germany and the Netherlands, and now in the UK.

There are 2 types of modern green roof systems, intensive and extensive. Intensive green roof systems are generally for heavier landscape constructions on flat roofs, whereas extensive systems can be installed over any deck and contain a number of layers including vapour retarder, insulation and waterproofing membrane layers beneath the vegetation. The general idea is to firstly provide a waterproof layer on a flat roof (or angled up to 45 degrees), and then put a thin layer of living vegetation on top of this.

What is the point of a green roof?

A green roof / eco-roof / living roof as the name suggests, has a more positive environmental and energy efficient impact than a conventional roof. A green roof provides an ecologically friendly space which ‘gives back’ to its environment rather than harming or taking away from it.

Unlike ‘roof gardens’ which are traditionally for city dwellers with no ground level garden space, green roofs are not as ‘heavy’ i.e. they only have a thin layer of vegetation (sedum and mosses). Roof gardens have large amounts of soil and all manner of plants, which in turn means work and maintenance are required throughout the year. Green roofs however are virtually self-sustaining, perhaps requiring some weeding once a year, or an application of slow-release fertiliser.

There are a number of other benefits to green roofs:

Rainfall is trapped in the vegetation and released slowly, thus helping to prevent flooding.

The layer of vegetation acts as natural insulation, thus reducing your heating / energy consumption and bills.

The insulating properties of the vegetation layer also reduce any extremes of temperature inside a building i.e. the sun’s heat is absorbed during the day keeping the inside of the building cool, and this heat is retained at night keeping the building warm.

Green roofs provide a fantastic environment / micro habitat for wildlife e.g. beetles, spiders, birds, bees and butterflies.

A green roof is visually appealing and contributes to a more ‘natural’ looking environment in a built-up area.

How can you get a green roof?

Find a specialist flat roofing company in your area, and ask them for a survey and quote.

What are green roofs?

Green roofs or eco-roofs are the modern versions, and have many of the benefits of the ‘sod roofs’ that have been used in Scandinavia for centuries. Green roofs have risen rapidly in popularity, particularly in Germany and the Netherlands, and now in the UK.

There are 2 types of modern green roof systems, intensive and extensive. Intensive green roof systems are generally for heavier landscape constructions on flat roofs, whereas extensive systems can be installed over any deck and contain a number of layers including vapour retarder, insulation and waterproofing membrane layers beneath the vegetation. The general idea is to firstly provide a waterproof layer on a flat roof (or angled up to 45 degrees), and then put a thin layer of living vegetation on top of this.

What is the point of a green roof?

A green roof / eco-roof / living roof as the name suggests, has a more positive environmental and energy efficient impact than a conventional roof. A green roof provides an ecologically friendly space which ‘gives back’ to its environment rather than harming or taking away from it.

Unlike ‘roof gardens’ which are traditionally for city dwellers with no ground level garden space, green roofs are not as ‘heavy’ i.e. they only have a thin layer of vegetation (sedum and mosses). Roof gardens have large amounts of soil and all manner of plants, which in turn means work and maintenance are required throughout the year. Green roofs however are virtually self-sustaining, perhaps requiring some weeding once a year, or an application of slow-release fertiliser.

There are a number of other benefits to green roofs:

Rainfall is trapped in the vegetation and released slowly, thus helping to prevent flooding.

The layer of vegetation acts as natural insulation, thus reducing your heating / energy consumption and bills.

The insulating properties of the vegetation layer also reduce any extremes of temperature inside a building i.e. the sun’s heat is absorbed during the day keeping the inside of the building cool, and this heat is retained at night keeping the building warm.

Green roofs provide a fantastic environment / micro habitat for wildlife e.g. beetles, spiders, birds, bees and butterflies.

A green roof is visually appealing and contributes to a more ‘natural’ looking environment in a built-up area.

How can you get a green roof?

Find a specialist flat roofing company in your area, and ask them for a survey and quote.

Are you looking into replacing your roof? If you go with a regular asphalt shingle roof, you will be doing the same thing in a decade or so. Also, asphalt roofs may leach chemicals into rainwater, which are then carried in the storm run-off and into the creeks and streams. There are several eco-conscious roofing options available these days. Here are some of them.

1. Metal

The metals used in roof construction are usually made from some combination of steel, copper, tin, and aluminum. Metal roofing made from recycled metals is also available. Metal roofs last a very long time – up to 50 years. When it does need to be replaced, you can recycle it.

In the summer, metal roofing reflects the sunlight rather than absorbing it, keeping your home cooler. As long as your attic is insulated, metal roofs do fine in cold weather too. And because metal roofing can be installed right over your existing roof, it saves effort and reduces waste. You won’t have an entire asphalt roof to dispose of.

2. Living Roofs

Also known as “green roofs,” this innovative roofing material absorbs water and provides a home for wildlife. Some homeowners even have productive gardens on their roofs. A membrane, or waterproof layer, is placed between your house and the soil on top. Often, slabs of sod are laid down to create the roof initially.

These roofs certainly reduce storm run-off, and are very efficient insulators. They can also be installed over your existing roof, as long as your home or building is deemed strong enough to hold up the weight of both roofs.

Living roofs help keep the building cool in summer and warm in winter.

3. Sustainable Wood Shingles

In the old days, wood shingles were made from old-growth trees. However, sustainably-grown cedar shingles are now available. Cedar is resistant to insects, which is one of the reasons why people choose cedar mulch for their gardens. When your cedar roof does wear out eventually, you can recycle it into this very mulch.

4. Concrete

Before you envision your home buckling under the extraordinary weight of concrete, consider fiber-reinforced concrete. The fibers mixed into the concrete are made from glass or metal. This light, aerated, tough material makes an eco-friendly roofing option. It insulates well, conserving energy, and it lasts a long time, reducing waste.

5. Rubber

Believe it or not, rubber has made its way into the realm of eco-friendly roofing. It comes in a variety of textures and styles, and can be made to look like traditional roofing materials such as slate, wood or tile. Its weight is about the same as asphalt shingles, and it can be made from recycled rubber. It is very durable, springing back from impacts that would ruin a traditional roof, such as large hail and tree branches. And it is highly water-resistant.

6. Clay or Ceramic Tiles

While subject to breakage of the individual tiles, these roofs are nontoxic and durable. The occasional broken tile can be replaced. Ceramic tiles are fire-proof. However, it takes a great deal of energy to bake and harden these tiles.

As you can see, there are quite a few options available for eco-friendly roofing materials. Hopefully, you will be able to find one that fits your needs.