A customer wants a low profile shower in a downstairs bathroom on a concrete floor. The drainage chanell required would need penetrate the dpc on the outside wall and so presumably that of the floor inside the house too. (I assume they should be on same level?) Drainage would travel about about 1 to 2m into the house perpendicular to the outside wall. Are there acceptable ways to do breach and patch pdc, or is it best totally avoided?
Thanks
Thanks