The roofing felt on my shed is going slightly bald although it is not leaking, the little bits of grit (i think) are coming off, is there anything i can use to make sure of no leaks.
As my dishwasher,s waste pipe is joined to my sink waste every time i turned taps on water is going into my dishwasher via its waste pipe, never happened before in 2 years does anyone know the problem?