Sutton Coldfield, United Kingdom

To incorporate a home cinema into a large extension to a private house in Sutton Coldfield, the owner decided to go underground!

private house sutton coldfield watertight concrete project
ocean point watertight concrete project

Project Requirements

With the soil being clay based and the water table just centimetres below, a watertight solution was an essential requirement in building the basement.

Sika Solutions

Robinsons Construction Group, the main contractor on the build, decided upon Sika® Watertight Concrete as the solution to this problem. The BBA certified Sika® Watertight Concrete system incorporates two state-of-the-art powerful Sika® admixtures. These work firstly by reducing the water cement ratio, whilst producing a highly workable concrete to aid placement and compaction, and secondly, by blocking the remaining capillary pores.

Wayne Robinson from Robinsons Construction Group said: “From the start of the project, Sika® have provided an excellent, professional service, with good communication along with sound advice and technical back up. Going with Sika® Watertight Concrete was an easy decision to make, and this has proved totally successful”.

Bardon Concrete supplied 200 cubic metres of concrete to the project, using the bagged Sika® Watertight Concrete system. This consists of a powdered version of the system in dissolvable bags for ease of use. The bags are simply added to the concrete mix through the back of the ready mix truck at a quantity of one per cubic metre of concrete, prior to leaving the production plant. This simple operation is fast and easy and ensures a correct dosage every time.

Construction joints were sealed with the SikaSwell® jointing system, which consists of joint sealing profiles that expand on contact with water to seal any voids between adjoining concrete slabs. Sika® have solutions for movement and non-movement joints.

Sika® Watertight Concrete is a proven alternative to external membrane systems, saving time both at the design and construction stage. The system has a successful track record going back 50 years.