DIY Forum

 

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 Thu Nov 15, 2018 5:17 pm
Visit Hilti


Time zone: Europe/London




 

 


Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Wed Jun 27, 2018 11:09 am 
Offline
Newly registered Member

Joined: Tue Jun 26, 2018 1:39 pm
Posts: 3
Has thanked: 1 times
Been thanked: 0 times
Hi,

Sorry if I have posted this in the wrong section...

I have a flat roof extension at the rear of my property and have just had the roof deck replaced which is a 24mm ply deck, the sheets from the old one looked more like a book than a sheet of ply due to delamination with an EPDM membrane covering it.

The rotten timber was caused by the fact that although there is a gap between the insulation above the ceiling and the roof deck (there is also a polythene covering over the insulation) there is no ventilation or airflow, so as a result the ply ended up absorbing enough moisture to delaminate.

I would like to install a couple of vents (preferably circular) along the fascia but am worried that water will just blow in through the vents and under the roof deck resulting in the same problem or worse, I've already had the bathroom ceiling fall down due to this issue!

Can anybody recommend a good fascia vent that will allow air flow underneath the roof deck without allowing water to be blown in?

There is also a tiny puncture in the EPDM membrane literally smaller than the diameter of a pencil, is there an EPDM friendly sealant or adheasive I can use to cover this? I have some general purpose exterior sealant or sanitary sealant but not sure that this will be suitable to use on the rubber roof membrane.

Thanks in advance.


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Wed Jun 27, 2018 4:34 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 24006
Location: hants/dorset border
Has thanked: 1503 times
Been thanked: 3801 times
:welcomeuhm:

Pics please for part one.

Part 2 Google EPDM pond repair kits (seriously)

_________________
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/



For this message the author wine~o has received gratitude : davet101
Top
 Profile  
Reply with quote  
PostPosted: Wed Jun 27, 2018 7:17 pm 
Offline
Newly registered Member

Joined: Tue Jun 26, 2018 1:39 pm
Posts: 3
Has thanked: 1 times
Been thanked: 0 times
Thanks for the response,

Picture (should) show the fascia board which I want to put the vents on, just had a fight with the attachment function! Please excuse the state of my pipe lagging...

Had never considered a pond EPDM repair kit, I take it that'll be OK getting hot in the sun given that it's normally used underwater?


Attachments:
File comment: Fascia board to be vented
fascia2.jpg
fascia2.jpg [ 99.53 KiB | Viewed 443 times ]
Top
 Profile  
Reply with quote  
PostPosted: Wed Jun 27, 2018 7:30 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 24006
Location: hants/dorset border
Has thanked: 1503 times
Been thanked: 3801 times
Looks like you are trying to put vents in the sides. You want vents on the front/low ends if at all.. :scratch:

_________________
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 Jun 27, 2018 8:01 pm 
Offline
Newly registered Member

Joined: Tue Jun 26, 2018 1:39 pm
Posts: 3
Has thanked: 1 times
Been thanked: 0 times
Yes thats the side of the extension, it's one structure which spans across my neighbours house too.

The fascia at the end has a gutter mounted on it so surely I can't put a vent in there?

Chose this section as this was the spot where the old roof deck had been most badly affected by the sweating insulation underneath.


Top
 Profile  
Reply with quote  
PostPosted: Wed Jun 27, 2018 11:32 pm 
Offline
Senior Member

Joined: Fri Nov 01, 2013 9:36 am
Posts: 788
Has thanked: 3 times
Been thanked: 134 times
if the new roof needs ventilation then it should be through ventilation.
look up diagrams of cold roofs and warm flat roofs and see which kind you have.
ventilation is usuly built in as the roof is constructed, not afterwards.

can i see three flat roofs?
some more photos of the front and other side and top surface of the roofcould help.

i take it that pitchedroof vents allowed water into the loft and on to the bathroom ceiling?


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

 

 




Similar topics
   

Time zone: Europe/London


Who is online

Users browsing this forum: OchAye 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:  
Visit Solent plastics


 

 

 

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