Although not always necessary, it is a good idea to speak to your local authority planning department about the relevant permissions and building regulations for green roofs in your area. You may need to submit your plans and carry out a roofing survey to ensure your existing roof structure is capable of bearing any additional weight beyond the membrane. Local building control may request a consultation for this.
Permaroof Kent offer free roofing surveys and can take a look at your roofing for you. We’ll give you an honest assessment and advise you of your options for green roofing, should improvements be needed.