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 Thu Oct 19, 2017 10:09 am
Visit Thermo worx


Time zone: Europe/London [ DST ]




 

 


Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Wed Sep 20, 2017 9:52 am 
Offline
Newly registered Member

Joined: Wed Nov 12, 2008 1:37 pm
Posts: 15
Has thanked: 2 times
Been thanked: 1 times
Is there any downside to using mastic and/or plaster to fill the gaps between wooden joists and the joist sockets in a brick wall?

These joists form the ceiling for the ground floor so would have warm rooms above and below. Plasterboard ceiling underneath, standard wooden floorboards on top, the void between the joists will be filled to half-depth with rockwool acoustic insulation. The brick walls the joists are set into are the inside leaf of a (poorly) insulated cavity wall.

I'm planning on soundproofing the party wall between my house and next door which should address the direct path the noise is taking. The small gaps around the joists would provide a path for flanking noise from the cavity to enter my house though. I'd like to block that path but I'm a little worried that if I reduce airflow too much within the voids that might lead to moisture getting trapped and could lead to rot.

Then again the whole ceiling/floor should be at roughly the same temperature as the rest of the house, so perhaps condensation in there wouldn't be an issue? Any opinions?


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Wed Sep 20, 2017 11:10 am 
Offline
Senior Member
User avatar

Joined: Wed Nov 17, 2010 5:51 pm
Posts: 7028
Has thanked: 345 times
Been thanked: 1226 times
In the normal course of a new build, those joists would usually be built in with a sand & cement mixture the same as used for laying the blocks/bricks.

That would be a better option than either mastic or plaster.

_________________
One day it will all be firewood.


Top
 Profile  
Reply with quote  
PostPosted: Wed Sep 20, 2017 10:48 pm 
Offline
Senior Member

Joined: Fri Nov 01, 2013 9:36 am
Posts: 555
Has thanked: 2 times
Been thanked: 95 times
joist tails in wall pockets have to be well built in solid so that thres no movement


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 


Similar topics
   

Time zone: Europe/London [ DST ]


Who is online

Users browsing this forum: No registered users and 2 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 Hilti


 

 

 

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