State One Disadvantege Of A Green Roof

Here are some of its disadvantages.

State one disadvantege of a green roof.

Green roofs can be very heavy. There are very few disadvantages but the cost of installation is the main one. This means that your dream of a green roof can be too heavy for your current structure to withstand. Green roofs act as natural insulation.

If the inclination angle is higher than 35 degrees special techniques have to be used in order for the different layers to stay in place. Green roofs offer so many benefits that you would be crazy not to consider an installation in an appropriate area. One of the top disadvantages of green roofs is that you can only choose some few available plants such as sedums lichens mosses and low growing grasses they are considered as one of the most common choices for extensive roofs. The biggest and also the most noticeable difference that green roofs make will be in the electricity bills.

Without doubt one of a green roof s most beneficial advantages is thermal performance and it s staggering just how much of a difference this can make. A 2006 study that investigated the feasibility of cool roofs on residential buildings in california found that increasing the reflectance of standard shingle metal or tile roofs by 0 15 0 30 could save more than 100 kilowatt. Once you understand the potential cons of a green roof it ll be easy to make a well informed decision on whether or not to move on with the project. Less extensive green roof options use smaller layers of soil but also support less plant life.

Extensive roofs can still be very heavy at up to 50 lbs. They will keep heat out during summers. For a building not already structurally ready to support that load the needed changes can cost a lot up front. Limited choice of plants another one of the disadvantages of green roofs is the available plant selection especially if you choose an extensive system.

Advantages and disadvantages of a green roof advantages. One of the biggest problems facing a typical roof is poor insulation leading to substantial heat loss in winter and sweltering conditions over the summer months. A green roof will be more expensive to install than a traditional flat roof as the underlying structure may have to be strengthened to cope with the extra load. Intensive roofs can create a load of up to 100 lbs per square foot.

In this case one speaks of an energy roof. Disadvantages structural limitations green roofs can be heavy really heavy if you want one extensive enough to plant trees and shrubs. They will keep heat inside the home by preventing dissipation through the roofing material during winters. In addition to being one of california s hottest cities fresno is also one of its most populous with nearly 500 000 residents and more than 170 000 housing units.