In this episode, Janey and Ashley don hard hats and head for a construction site. They are set to work making mortar, and they find out just how hard it is to build a simple wall. Next up, they have to get their heads around more complicated tools to connect cold and hot water pipes. Their work is then put to the test when it's hooked up to the live water main, and it could be a disaster if the site starts filling up with water!