Plastic under the paving

Plastic under the paving

I was called by one of our building contractors to analyze why a client of his had a problem with their paving. The client is a major law firm in Johannesburg and their paving was only 5 years old but was shifting badly and opening gaps in the paving. Some of the gaps were as wide as 4cm. I personally could not believe that the paving was only 5 years old and even though it was cement bevel bond and not clay, there was just no way that the paving should have deteriorated to this extent.

Plastic under the paving being removed

re lifting the driveway to remove the plastic sheeting

We lifted a section of the paving to get an idea of how the paving was stabilised and found that the paving had been laid on a waterproof plastic sheeting. I knew just then that it could not have been a master builders paving company that laid the paving and actually told him. The client told me that it was the builder that built the building that also did the paving but wanted to know how I knew. The answer was simple, how is paving going to stabilise if laid on a sheet of plastic and where is the rain water going to drain to?

Paving destroyed by laying in water on plastic sheet

Water laying on the plastic sheet

Most builders do not know the science of paving but will undertake the job for the extra cash and most clients are just too lazy and too complacent to call in someone else to do the paving. The problem is that 3-5 years down the line the paving needs to be uplifted and re-laid which just adds to the expense of the paving.

never use plastic sheets under your paving.

Plastic sheeting under your paving offers no stability to your paving.

If you are about to do paving, ask the company that you are considering to use, to please lay a plastic sheeting under your paving, if they agree, fire them and get a paving company that not only refuses to lay plastic under the paving but also explains why it is wrong.

Relaying old bricks

Paving is a science and it should not be treated lightly or it will cost you a lot of money in the long run. Contact Richard on 084 300 4220 for more advice or a free quote on your paving.