Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
I poured 6 bags of this stuff onto a concrete basement slab in a new
bathroom. Seemed to do the job relatively well, but recently started cracking. These aren't hairline cracks, but up to 1/8". The instructions on the bag made no mention of paint on the concrete slab (pro or con). I have paint on the floor. Any ideas on what to do with this? I'm guessing that I'll have to rip it out. What I really want to know is what to do next time to avoid this painful and expensive mistake. Thanks in advance. Joel |
#2
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
Did you compact dirt/gravel before pouring? I think you have a settling
problem under the slab. You might have to do over, or same may happen again. |
#3
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
"Joel Racicot" wrote in message .. . I poured 6 bags of this stuff onto a concrete basement slab in a new bathroom. Seemed to do the job relatively well, but recently started cracking. These aren't hairline cracks, but up to 1/8". The instructions on the bag made no mention of paint on the concrete slab (pro or con). I have paint on the floor. Any ideas on what to do with this? I'm guessing that I'll have to rip it out. What I really want to know is what to do next time to avoid this painful and expensive mistake. Thanks in advance. Joel First off, I've used self levelling before with varying results but never cracking. Did you use the proper bonding agent (ie. it appears to be some sort of epoxy binder that you paint onto the floor)? I also seem to remember that you have to clean the slab of paint and such for this to bond properly. Cheers, cc |
#4
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
Yeah, I didn't read original post carefully enough- thought he was
pouring slab on to dirt. |
#6
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
James "Cubby" Culbertson wrote:
"Joel Racicot" wrote in message .. . I poured 6 bags of this stuff onto a concrete basement slab in a new bathroom. Seemed to do the job relatively well, but recently started cracking. These aren't hairline cracks, but up to 1/8". The instructions on the bag made no mention of paint on the concrete slab (pro or con). I have paint on the floor. Any ideas on what to do with this? I'm guessing that I'll have to rip it out. What I really want to know is what to do next time to avoid this painful and expensive mistake. Thanks in advance. Joel First off, I've used self levelling before with varying results but never cracking. Did you use the proper bonding agent (ie. it appears to be some sort of epoxy binder that you paint onto the floor)? I also seem to remember that you have to clean the slab of paint and such for this to bond properly. Cheers, cc Thanks for the responses. First, no I didn't use a bonding agent/primer, since, reading the instructions on the bag, they made reference to the fact that it was sueful in avoiding pinholes in the finished surface, not that it was necessary to prevent cracks. Having read a bunch of stuff last night, I realize that was a mistake (expensive too). They also don't make any reference anywhere (website, instructions on bag, etc. ) to paint being an issue (ouch again). I was thinking of laying down a layer of kerdi or embedding a plastic or wire mesh into any new layer. Any thoughts on that? |
#7
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
confused wrote:
"Joel Racicot" wrote in message I poured 6 bags of this stuff onto a concrete basement slab in a new bathroom. Seemed to do the job relatively well, but recently started cracking. These aren't hairline cracks, but up to 1/8". The instructions on the bag made no mention of paint on the concrete slab (pro or con). I have paint on the floor. Any ideas on what to do with this? I'm guessing that I'll have to rip it out. What I really want to know is what to do next time to avoid this painful and expensive mistake. Thanks for the responses. First, no I didn't use a bonding agent/primer, since, reading the instructions on the bag, they made reference to the fact that it was sueful in avoiding pinholes in the finished surface, not that it was necessary to prevent cracks. Having read a bunch of stuff last night, I realize that was a mistake (expensive too). They also don't make any reference anywhere (website, instructions on bag, etc. ) to paint being an issue (ouch again). I was thinking of laying down a layer of kerdi or embedding a plastic or wire mesh into any new layer. Any thoughts on that? Kerdi is Schlutter's waterproofing membrane, Ditra is their uncoupling & waterproofing membrane. http://www.schluter.com/english/prod...section-f.html You have options: - embed 1/4" Hardie backerboard in thinset. - use an isolation membrane. The manufacturer will specify the size of crack it will bridge. - fill the cracks with a pourable two part epoxy such as Git Rot. - take a flyer that the stuff won't move anymore and that the thinset will fill the cracks. R |
#8
Posted to alt.home.repair
|
|||
|
|||
EZ Flow self leveling underlayment cracking
Joel Racicot wrote:
I poured 6 bags of this stuff onto a concrete basement slab in a new bathroom. Seemed to do the job relatively well, but recently started cracking. These aren't hairline cracks, but up to 1/8". The instructions on the bag made no mention of paint on the concrete slab (pro or con). I have paint on the floor. Any ideas on what to do with this? I'm guessing that I'll have to rip it out. What I really want to know is what to do next time to avoid this painful and expensive mistake. Thanks in advance. Joel Well, thanks to all who responded. I'm resigned to the fact that I'm ripping it all out. I've also looked at different products and options and I think that I'm going with Mapei Ultraplan1 and UltraPrime L primer and, as per their instructions, grinding the paint off the surface with a diamond grinder (hopefully HD or Rona have those available for rental). One thing I like about this product is that they make it clear what has to be done before the product can be applied, as opposed to the EZ Flow product, which didn't say either way that it shouldn't be applied over a painted surface. I'll let you all know how it went. Joel |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
leveling floor | Home Repair | |||
Septic tank - low flow toilets | UK diy | |||
TRVs, flow switches and boiler cycling | UK diy | |||
Water flow rate problem and Combi boiler | UK diy | |||
p*ss poor flow rate to newly installed shower | UK diy |