#1  
Old 03-18-2012, 03:46 PM
Serf
 
Join Date: Mar 2012
Location: Mt Martha
Posts: 6
Default Render Needed for Dome. Suggestions Please?

After trying to use the 5:1 firelite to GP mix on the weekend I've decided I need something better as its nearly impossible to put on the steep areas of the dome and its extremely crumbly. I'm sure its ok for flat slabs though.
I'm after a sticky render to is suitable for the external rendering of the dome.

I have read that just using sand and cement is a good choice. Does anyone have any comments about this mix?

Cheers
Reply With Quote
  #2  
Old 03-18-2012, 03:52 PM
Les's Avatar
Les Les is online now
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,800
Default Re: Render Needed for Dome. Suggestions Please?

Are you putting this on over insulation or are you trying to use it as insulation?
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #3  
Old 03-18-2012, 04:13 PM
Serf
 
Join Date: Mar 2012
Location: Mt Martha
Posts: 6
Default Re: Render Needed for Dome. Suggestions Please?

Its going over two insulation blankets (total 50mm) so I don't need it to act as insulation.
Reply With Quote
  #4  
Old 03-18-2012, 04:44 PM
Les's Avatar
Les Les is online now
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,800
Default Re: Render Needed for Dome. Suggestions Please?

I would wrap it with chicken wire and apply stucco. I added some vermiculite(more insulation) on top of the blankets so I made some forms out of rebar to make it a little easier.
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #5  
Old 03-19-2012, 12:50 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,522
Default Re: Render Needed for Dome. Suggestions Please?

Quote:
Originally Posted by wood fired dan View Post
After trying to use the 5:1 firelite to GP mix on the weekend I've decided I need something better as its nearly impossible to put on the steep areas of the dome and its extremely crumbly. I'm sure its ok for flat slabs though.
I'm after a sticky render to is suitable for the external rendering of the dome.

I have read that just using sand and cement is a good choice. Does anyone have any comments about this mix?

Cheers
I use 5:5:1 medium vermiculite,medium perlite, GP cement. For some reason the 1/2 vermiculite 1/2 perlite works better than using either of them alone. Maybe your vermiculite is too course, it does not stick too well. I take a handful and starting from the bottom build it up using one hand on the outside and the other on top to make a flat ledge. Make it about an inch and a half thick. If you press and hold for a couple of seconds this also helps. The ledge you make will be what you build the next row on top of. The more the dome leans I the easier it becomes. Adding more cement in an effort to make it stickier will simply result in reducing its insulation value. You will swear that the stuff won't work, but given 24hrs it is firm enough. I like to leave it for a week to allow it to lose plenty of its moisture and then do a second layer.by tapping this second layer with the flat of a trowel you can get a really even surface.

For the render layer a 4:1:1 mix works well ie sand, cement,lime

Last edited by david s; 03-19-2012 at 12:52 AM.
Reply With Quote
  #6  
Old 03-19-2012, 07:04 PM
mrchipster's Avatar
Il Pizzaiolo
 
Join Date: Apr 2010
Location: Minneapolis, MN USA
Posts: 1,214
Default Re: Render Needed for Dome. Suggestions Please?

Quote:
Originally Posted by wood fired dan View Post
Its going over two insulation blankets (total 50mm) so I don't need it to act as insulation.
Quikwall is a fiber reinforced concrete that trowels nicely, goes straight up no problem and is very sticky. Used to line pools and is totally waterproof when used with latex additive.

It is a little pricy at 12 per 50 lb bag.

Chip
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Crack Repairs - No smoke escaping, are they needed? fornoa Forum Guidelines 9 01-26-2012 08:55 PM
Cement render over chicken mesh ravenja Getting Started 3 09-28-2011 03:38 AM
Cement Render (Stucco) Question Alter ego Tools, Tips and Techniques 7 05-06-2010 01:27 PM
Cement Render or Vermiculite Snapper Getting Started 0 01-28-2010 10:59 PM
Help I used the wrong castable....suggestions? Bill1 Getting Started 14 04-29-2009 05:58 PM


All times are GMT -7. The time now is 08:50 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC