Kerdi Shower System Over Slab - Kitchen & Bath Remodeling - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling > Kitchen & Bath Remodeling

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools
Display Modes
Old 04-07-2010, 10:26 AM   #16
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


Quote:
Why does the guy on that site recommend adding more sand to the premixed stuff?
Typically the recipe for deck mud for years and years was (and still is) 4:1 or 5:1, just depends on who you want to argue with. Back in the days of buying 90# Portland bags and having a truck load of sand delivered to a job site for the construction of "deck mud" floors this was practical and economical and the products were there on site when needed for a shower.

But, in the case of a "shower only" all of that isn't at all feasible. Where does the extra sand come from? In truth, the sand should be "sharp sand", but try to buy a little bag of sharp sand and see what happens. It isn't usually available. Blast sand is not the right product and play sand and all-purpose sand is much too coarse and sometimes full of rocks.

To answer your question: The added sand is to enhance ones ability to shave and sculpt the surface since the product is not "poured" but instead placed, packed and sculpted. Just so happens most bagged sandmix is only 3:1, no big deal.

I should also mention that you should use only water to mix the sandmix, NO ADDITIVES. Mixing the sandmix with enhancement additives IS NOT NECESSARY and will only serve to make the mix sticky and harder to manage. Once placed and shaved if there are still some imperfections one can scrub the surface with a wooden float to correct any errors, it is easy to do.
__________________
XXX
Bud Cline is offline   Reply With Quote
The Following User Says Thank You to Bud Cline For This Useful Post:
secutanudu (04-07-2010)
Sponsored Links
Advertisement
 
Old 04-07-2010, 10:29 AM   #17
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,268
Rewards Points: 1,026
Default


Great - i'll go with the premade sand mix and nothing else other than some water. I appreciate it.
__________________
Andrew

secutanudu is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-09-2010, 08:15 AM   #18
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,268
Rewards Points: 1,026
Default


Another quick question regarding the Kerdi installation. Would you guys recommend doing concrete backer board for the shower walls, or just using drywall? Thanks.
__________________
Andrew

secutanudu is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-09-2010, 09:20 AM   #19
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 11,194
Rewards Points: 5,348
Default


Quote:
Originally Posted by secutanudu View Post
Another quick question regarding the Kerdi installation. Would you guys recommend doing concrete backer board for the shower walls, or just using drywall? Thanks.
I would use the concrete board.
Ron
Ron6519 is offline   Reply With Quote
Old 04-09-2010, 08:05 PM   #20
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


NO DRYWALL, NO GREENBOARD.

Technically those products were outlawed by building codes a few years ago for use in showers.

Take a look at using Denshield. It would be much better than using regular cement board.
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 04-09-2010, 08:07 PM   #21
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,268
Rewards Points: 1,026
Default


I went out and bought hardi-backer concrete board, gonna go with that for the whole shower. Thanks for the advice.
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 04-09-2010, 08:11 PM   #22
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


Hardi is a good product.
Don't forget you need a moisture barrier behind the Hardi.
Denshield does not require a moisture barrier behind it.
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 04-09-2010, 08:13 PM   #23
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,268
Rewards Points: 1,026
Default


But isn't the kerdi membrane a moisture and water barrier? If that's installed properly, even the front of the hardi should get no moisture, right? The shower is on all inside walls, if that makes a difference.
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 04-09-2010, 08:26 PM   #24
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


MY BAD!!! I was forgetting the KERDI.
My apologies...drywall IS allowed behind KERDI. I would never use it but Schluter thinks it's OK.

I read and get involved in too many threads on a daily basis and sometimes they all seem to run together. I was lost for a few minutes.

Your OK.
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 04-09-2010, 08:35 PM   #25
Registered User
 
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526
Default


Congratulations Bud! You fulfilled it, if only for a short time period--- "Some days I aspire to becoming a missing person."

I always enjoy reading your answers, Keep them up.

Be safe, Gary
__________________
If any ads are present below my answer or words underlined/colored, I do not condone/support/use the product or services listed/linked to, they are there without my consent.
17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
Gary in WA is offline   Reply With Quote
Old 04-10-2010, 12:32 PM   #26
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


I am s-o-o-o-o confused!!!
__________________
XXX
Bud Cline is offline   Reply With Quote
Sponsored Links
Advertisement
 
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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kerdi shower base Joe F Building & Construction 5 11-04-2009 11:57 AM
kerdi shower base paluch General DIY Discussions 4 09-23-2009 08:08 AM
Shower Pan and concrete slab plumbing LTempleton Kitchen & Bath Remodeling 2 08-08-2009 12:47 PM
I thought I put it back together properly: leaky shower valve (Matco-Norca) shuuy Plumbing 1 06-18-2009 10:44 AM
shower in basement slab philip96 Plumbing 2 06-15-2008 09:46 PM




Top of Page | View New Posts