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Property Surveying Blog
February 21, 2017

CCTV Drain Surveys

Written by Beau Davies

If you live in a terraced or semi-detached property you will be familiar with the drainage that is prevalent to these types of properties. However, if you don’t, one of the most common characteristics that these properties have, is they will always share drainage pipes.

Party Wall Drain Survey

This means the drainage pipes for each respective property within the terrace or pair of semidetached properties, will all connect to the same pipe run that runs along the rear of the houses.

This means that when an owner wants to extend their property by constructing an extension to the rear of their house, they will need to build over the existing drainage pipes.

The homeowner undertaking the works will therefore need to consider undertaking pre construction investigations.

This is where a CCTV drain survey can prove very helpful and can actually protect the building owner both during and after the construction works.

Having a CCTV drain survey undertaken in advance of the construction works commencing ensures that there is a full and thorough understanding of the condition of the drainage before the construction works start on site.

This clarifies if the drains are ruptured, cracked, blocked, failing, or in need of repair.

Once the CCTV drain Survey has been undertaken, the condition of the drains can then be documented by the Party Wall Surveyors ensuring there is no confusion or misunderstanding to their condition both during or post works and importantly ensures that the building owner isn’t held liable for costly drainage repairs if they were in a poor state before the construction works commenced.

The CCTV drain survey is undertaken by a trained and experienced technician and will see the manhole lifted with a CCTV rod inserted into the drainpipe. The rod will then be fed through the run of the drain and as it gets further down the run, it will identify both the condition of the drainage pipe and also confirm if there are any blockages or defects present.

With majority of drainage pipes being constructed of clay and having been installed around the turn of the century or circa the 1930s, these pipes are not only designed for far less traffic and usage then they currently receive, they are also in many cases reaching the end of their lifespan.

Modern construction work can place a great deal of strain on these pipes and therefore careful and thorough consideration needs to be taken in advance of the works commencing. A CCTV drain survey is an excellent way to do this.

If you are planning on undertaking an extension to your property, give our qualified and experienced party wall team a call now and one of our surveyors will be happy to assist you.