Job in Dublin by Guillaume (Dublin 8) ID: 6718986

Hi, I have an existing slate roof vent tile in a pitched roof attic. The internal spigot is 100 or 110mm, but I want to install a 150 mm kitchen extractor duct. I need to know if the existing roof vent terminal can take a 150 mm adapter or if the whole slate vent tile needs replacing.
It is a 2nd floor apartment in 2 story building.