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 Wed Nov 21, 2018 8:11 pm
Visit Hilti


Time zone: Europe/London




 

 


Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Garage Roof Insulation
PostPosted: Tue Feb 06, 2018 7:29 pm 
Offline
Newly registered Member

Joined: Tue Feb 06, 2018 7:14 pm
Posts: 2
Has thanked: 0 times
Been thanked: 0 times
I want to insulate my garage roof, which is corrugated steel on 6" joists, as part of my workshop upgrade (I'm knocking one of the walls out to join up to an existing very comfortable workshop).

Q1. How thick do I need to make the insulation? 35mm, or 75? I know that thicker is better but is that really quantifiable? My thinking is that a solid type insulation board will be best, to allow air circulation to continue above the insulation to prevent condensation, so something like Celotex or (much cheaper) EPS70 polystyrene would fit the bill. I will be putting an 8mm tongue and groove timber ceiling up to cover it all up and make it look good, having rejected plastic which seems to be a similar price.
Q2. The concrete floor is at least 12 years old. I'd like to put down a levelling compound before painting, but none of them seem to recommend paint once levelled. Any ideas?

That's it for now; TIA!

A.L


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Thu Feb 08, 2018 8:27 am 
Offline
Senior Member
User avatar

Joined: Thu Mar 09, 2017 4:47 pm
Posts: 700
Location: East Riding of Yorkshire
Has thanked: 13 times
Been thanked: 182 times
Q1. It is difficult to advise you as obviously the thicker the insulation the more expensive it will be.
If you were going by Building Regs and the space was for normal human habitation, the advised tickness of Celotex would be 125mm thick! This would be cut and installed between the 6x2 rafters & the t&g fixed over it.
So the choice is yours alone, for a workshop I think I would consider 100mm thick.

Q2. Thoroughly clean the floor surface and lay a granolithic screed about 25mm thick.
Just before laying, paint with Unibond (Mixed as instructed on the can for primer) and lay the screed while still wet.
You could lay a conventional Sand/cement screed but this would have to be about 60mm thick minimum.
Both would take floor paint well.

Davyp1


Top
 Profile  
Reply with quote  
PostPosted: Thu Feb 08, 2018 9:41 am 
Offline
Newly registered Member

Joined: Tue Feb 06, 2018 7:14 pm
Posts: 2
Has thanked: 0 times
Been thanked: 0 times
Ace, thanks Davyp1, for the comprehensive reply.
Q1. I've put 100mm Jablite in between the joists (workshop only), leaving a 2" gap between that and the corrugated roof for ventilation.
Q2. Great - I now know what to do!
Cheers,
A. L


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


Who is online

Users browsing this forum: No registered users and 1 guest


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