Thanks mate that is what these forums are for.
We are all students in the university of life.
I love to learn.
Still a long way to go before it is finished but it will be so worth it.
Thanks to all that advised
View from the other end.
Might start the car port 're roof at the weekend I have got 5 sheets left need 6 but I'll bodge the off cuts together and match it all up.
Just have a hopper with bathroom wastes and a soil pipe to somehow seal around.