am building a conservatory. have put in harcore/sand binding. in order to maintain airflow to underfloor of existing house, have had to put 4 x 4in drainage pipes to feed the air under the existing house, and these are fed into telescopic ventilators.
trouble is, i cannot lap the dp membrane up 2 sides of the conservatory because of these pipes. is there a solution?
i thought about puttting a dpm on the base, then insulating it, then another dpm over the inslulation / pipes so that i could then lap it over the dwarf wall and up the existing house wall.
would this be ok or could i end up trapping moisture between the dpm?
help!! PLEASE
trouble is, i cannot lap the dp membrane up 2 sides of the conservatory because of these pipes. is there a solution?
i thought about puttting a dpm on the base, then insulating it, then another dpm over the inslulation / pipes so that i could then lap it over the dwarf wall and up the existing house wall.
would this be ok or could i end up trapping moisture between the dpm?
help!! PLEASE