DIY Forum

 

Ultimate Handyman Ultimate Handyman Ultimate Handyman Ultimate HandymanUltimate Handyman on Pinterest

 

DIY Forum/Home improvement advice forum

 

 

A-Z CONTENTS | DISCLAIMER | DIY VIDEO | HOME | SAFETY FIRST | FORUM RULES

It is currently Mon Jul 16, 2018 7:38 am
Visit Hilti


Time zone: Europe/London [ DST ]




 

 


Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: Damp patch above Shower
PostPosted: Wed Jan 10, 2018 5:58 pm 
Offline
Newly registered Member

Joined: Sat Aug 22, 2009 12:20 pm
Posts: 22
Has thanked: 0 times
Been thanked: 0 times
Hey Guys,
When we moved into our home a few years ago we knew the ensuite ceiling had a damp patch, I put this down to the fan not working correctly.

We changed the bathroom about 18 months ago and I replaced the fan, I explained to the guy in the plumber's merchants that there was damp and I needed a really good fan to help extract the steam so he gave me one that he said he used in his own home.

Well the damp came back after a few months and I really need to get it sorted, the damp patch is pretty big but I would like to understand what is wrong exactly and how to not only fix the issue but how I can prevent this from happening in the future. I have also noticed a build up of damp around the window in the bedroom where the ensuite is.

The ensuite is approximately 3m by 2m with a large double shower, the fan extracts to the outside and is fitted in the ceiling approx 1m away from the shower head. I had first thought of simply moving the whole fan to directly above the shower, however, I'm not sure if this alone will fix the problem. We leave our window in the bedroom and the ensuite on vent and try to open the window when we shower but it doesn't help much.

Would I benefit from just moving the fan or would a more sophisticated vent system be needed?

Thanks for your help on this guys.


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Wed Jan 10, 2018 7:03 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 23685
Location: hants/dorset border
Has thanked: 1452 times
Been thanked: 3723 times
damp patch could be caused by condensation in the shower cubicle or could be a leak from above... does your fan have a timed over-run ?

Pics may help.

_________________
Verwood Handyman

Verwood Handyman


___________________________________________________________________

If you feel you have benefited from the Free advice given on the Forum, Please consider making a donation to UHM's Nominated charity, read all about it and donate here :

http://www.donnasdreamhouse.co.uk/


Top
 Profile  
Reply with quote  
PostPosted: Wed Jan 10, 2018 7:49 pm 
Offline
Newly registered Member

Joined: Sat Aug 22, 2009 12:20 pm
Posts: 22
Has thanked: 0 times
Been thanked: 0 times
Yea the fan runs for about 2 minutes after the light is switched off.


Top
 Profile  
Reply with quote  
PostPosted: Wed Jan 10, 2018 8:05 pm 
Offline
Mr. Grumpy

Joined: Tue Nov 18, 2008 3:41 pm
Posts: 3193
Has thanked: 31 times
Been thanked: 116 times
2mins is not enough. Many can be adjusted up to 20mins
Does it have a trickle feature an humidistat?
Makes a big difference


Top
 Profile  
Reply with quote  
PostPosted: Wed Jan 10, 2018 8:27 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 23685
Location: hants/dorset border
Has thanked: 1452 times
Been thanked: 3723 times
Concur 2 minutes is not enough. 15/20 minutes would be better.

_________________
Verwood Handyman

Verwood Handyman


___________________________________________________________________

If you feel you have benefited from the Free advice given on the Forum, Please consider making a donation to UHM's Nominated charity, read all about it and donate here :

http://www.donnasdreamhouse.co.uk/


Top
 Profile  
Reply with quote  
PostPosted: Wed Jan 10, 2018 8:32 pm 
Offline
Newly registered Member

Joined: Sat Aug 22, 2009 12:20 pm
Posts: 22
Has thanked: 0 times
Been thanked: 0 times
I need to check if it can go up further but I don’t think it has a humidistat feature.

I was thinking of changing it to an in-line extractor as I read these are more powerful. I could then separate it from the light or add a humidistat possibly.

Would something like this below help alongside the extractor?

https://www.vent-axia.com/range/lo-carbon-pozidry-pro


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 12, 2018 6:33 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 23685
Location: hants/dorset border
Has thanked: 1452 times
Been thanked: 3723 times
There is normally an adjustment to run the fan for up to 20 minutes after switching off.

_________________
Verwood Handyman

Verwood Handyman


___________________________________________________________________

If you feel you have benefited from the Free advice given on the Forum, Please consider making a donation to UHM's Nominated charity, read all about it and donate here :

http://www.donnasdreamhouse.co.uk/


Top
 Profile  
Reply with quote  
PostPosted: Sat Jan 13, 2018 10:45 pm 
Offline
Senior Member
User avatar

Joined: Wed Jan 13, 2010 4:33 pm
Posts: 719
Location: North Herts
Has thanked: 36 times
Been thanked: 109 times
I suspect the route of the problem is your ceiling/ window reveals are not correctly insulated above/behind. Thus the dew point of the ceiling (coldness) is causing the water vapour in the air to condense. If it were condensing all over the ceiling & walls, sink, toilet etc then that would suggest you've got a ventilation problem.

Remember also that you don't just need to pull warm wet air out of the bathroom, warm dry air has to come in (usually under/around the bathroom door), or it will be trying to pull a vacuum and be very ineffective. Same applies if your flexi duct is pinched in the loft or (if through the wall type) the back draft shutters can jam shut against the flexi ribs.


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 14, 2018 12:11 am 
Offline
Senior Member

Joined: Tue Jul 05, 2016 7:16 pm
Posts: 103
Has thanked: 8 times
Been thanked: 14 times
It cold be hot/cold insulation if it's affecting another part of the house. Is the room fully insulated/ fully uninsulated?


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 14, 2018 1:50 am 
Offline
Senior Member
User avatar

Joined: Tue Jan 26, 2010 8:49 pm
Posts: 371
Location: PA16
Has thanked: 131 times
Been thanked: 33 times
Hi Stuart
First thing I would do is get up in the loft space and check the duckting that takes the damp air to the outside. Normally a white flexible pipe. Is it full of water at some points? Is the insulation wet where the ducting touches it?
I have seen a whole section that dips into the insulation full of water when the warm damp air re condensates and runs back down the pipe before it gets to the outside. As the pipe fills with water the gauge narrows expediting the problem.
The very thin plastic pipe then splits and starts to drip onto the insulation that in turn causes a damp patch on the ceiling below.

Some pics would help a lot to help determine damp or mold

Cheers
James

_________________
I love hard work, I could watch it all day


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 


Similar topics
   

Time zone: Europe/London [ DST ]


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  


 

 

 

News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list
ultimatehandyman privacy policy

Contact

 

Powered by phpBB® Forum Software © phpBB Group

phpBB SEO