Hydrogen sulphide from standing waste smells like rotten eggs; a dried floor trap in a utility room lets courtyard air straight into the kitchen. Intermittent whiffs after rain point to surcharging gullies leaching under flagstones.
Darren smoke-tests suspect lines, checks vent terminals for bird nests, and scopes hidden stacks behind stud walls—no point masking odour with chemicals if a cracked collar vents into a cavity.
Persistent smell with headaches or nausea needs urgency—sewer gas is not “just Dublin humidity”. Call 085 175 6277 for a methodical search.
Frequently asked questions
Could smell be a dead animal?
Yes in loft vents—Darren rules drain causes first, then suggests other trades if dry.
Will bleach fix it?
Briefly masks; does not restore trap seals or repair cracks.
Is CCTV needed for smells?
Often yes to confirm hidden cracks belching into walls.
