soil pipe and leaky consevatory

[tapwench]

i have a soil stack pipe which comes down through my consevatory roof which we have never been able to waterproof properly so i would like to know if there is an internal system which means i can do away with the pipe through the roof and have a dry floor when it rains!

 

[Simon F]

hello,
Many properties built over the last few decades have the soil stack internal.
So it is more than possible, but to do it retrospectively is not a small undertaking.
The soil pipe will always expand and contract with temperature variations, has this been taken into account in trying to seal it?

 

[snowhead]

Is it just a vent or does the upstairs bathroom / wc join into it above the roof?

There are plenty of flashings available eg;

Roof Flashings and Pipe Flashings - Dektite and V-Seal

If you divert / cut back the vent pipe you'll have a hole in the roof to fill, which might leak in the future and the circle completes.