This 7 x 4m Log Cabin Base Kit is quick and easy to install due to its simple interlocking design, a great alternative to laying heavy slabs or concrete. It is made from 100% recycled plastic making it eco friendly. This kit includes 122 squares. Each square measures 500 x 500mm. For your convenience, a heavy-duty, commercially-graded membrane is also included. Quick and easy to install due to its simple interlocking design, a great alternative to laying heavy slabs or concrete. Lightweight yet still provides a strong and durable base for your shed. Eco friendly - made from 100% recycled plastic. Suitable to lay on any reasonable level surface. Includes heavy-duty membrane.