musty smell en-suite new build

Stihl waters

Was an airtight membrane used without adequate ventilation from the bathroom

listermint

You need to seal properly with plastic and tape or elastic band the drain for the Washing machine and the shower drain.

Then leave the window open in the room all day.

Then close it at night and check in the next morning if the smell is still there.

Everything described so far sounds like a drain. However drains can have a fresher sharp smell. Musty type smells come from wet materials e.g carpet, rolled insulation, wet plasterboard.

So if above doesn't stop the smell then chances are you have a leak somewhere behind the shower or elsewhere within the room start looking at water feeds. Shower Taps washing machine feed line . Taps . Toilet feed. For damp

blackbox

The OP described it as musty smell. This is quite different from any smell you would get from drains or sewers.

I'd suspect there is damp plaster somewhere due to poor sealing, probably in the shower area.

chooseusername

What kind of overflow has your wash hand basin got,
any smell from that?

jrosen

Ok so ive spend time sniffing around.

The smell definitely smells damp/musty. More from old water than a sewer type smell.
Ensuite and main bathroom are side by side. I noticed last night that right under the sink in the main bathroom the skirting board is cracked, water marks and looks like there was a leak at some point before we moved in. Its bone dry, but maybe there is lingering water from that and im smelling it in my ensuite ? no smell in the man bathroom.

However I have noticed on occasion a more sewer type smell coming from the sink drain in the ensuite just for the first couples of seconds the tap is on.

Same at the kitchen sink.

So overall I think there is more going on here. Builder didnt show but ive left another message

DaveyDave

jrosen wrote: »

Ok so ive spend time sniffing around.

The smell definitely smells damp/musty. More from old water than a sewer type smell.
Ensuite and main bathroom are side by side. I noticed last night that right under the sink in the main bathroom the skirting board is cracked, water marks and looks like there was a leak at some point before we moved in. Its bone dry, but maybe there is lingering water from that and im smelling it in my ensuite ? no smell in the man bathroom.

However I have noticed on occasion a more sewer type smell coming from the sink drain in the ensuite just for the first couples of seconds the tap is on.

Same at the kitchen sink.

So overall I think there is more going on here. Builder didnt show but ive left another message

Any gaps in the bathroom? Our shower door was leaking and the puddle went down through the floor because the sink pipes in the floor weren't sealed which ended up leaking onto the living room ceiling.

Maybe a bath or shower tray sharing the walls is causing a leak somewhere you can't see?

poker--addict

Are you using main bathroom frequently. Might be worth using intensively for a while to see if it has any impact or anything becomes visible?