STAKKAbox™ Access Chambers can have a 12mm LDPE base fitted. This finishes the chamber perfectly! It eliminates the need to finish the floor on-site whilst keeping out any un-wanted vegetation. A simple drainage hole can be made into the base to allow water to escape. We can also provide more elaborate sump bases if required. Used by the Highways Agency in the UK, these have a 150mm deep recess at one end which allows for a sump pump to remove any standing water.