Surveyors are not drainage specialists and therefor do not cover underground services or areas covered up.
If there is cause for concern and further investigation is necessary we will recommend a CCTV drainage survey is undertaken.
A CCTV survey will allow a contractor to compile a detailed drain survey report and make any remedial recommendations.
From the survey the surveyor can see what exactly the problem is.
This can range from fractured pipework to collapsed drains and tree roots causing blockages.