Topics: TekSill water flow spacer for basement walls – minimize the consequences of any water spill in a basement – a new Montreal invention; Choosing a skylight – Pyramid with vent or dome; Musty smell at a cottage – the HRV air changer; When is the new deck stain I have talked about coming – Jon’s Homework; When do I know I need to change a hot water tank; Cracks in the brick mortar; How to purify household air next to extreme highway pollution; Can I get an air exchanger for an apartment – yes.