Black painted on tanking... Skim ok?

[rowland gatward]

Hi all just got a job to skim a bathroom and the customer has painted on that black stuff tanking I think? Is it ok to skim over as per usual? Any tips would be appreciated. Thanks

 

[henry]

just skim it mate the owners f**k*d up putting that shite on the wall. Just make sure it's dry before you skim. I had a job a few years back were the guy painted that bituminous stuff in a front bedroom thinking it would hold the damp back what a nob. I just skimmed it I told him what a fcuk up he had done.

 

[martinemj]

not sure if it will last though ?

you can't pva it for sure ......

 

[henry]

that is his problem mate not mine

 

[a.d.plastering]

betokontakte it first it mite help stop any reaction :huh:

 

[twitcher]

yep i'd wba too

 

[henry]

That black shite sweats and bubbles even with wba.on top.

 

[twitcher]

ok was just a suggestion. Wht to do then?

 

[hollybank]

Put a coat of carlite bonding on first then skim it.

 

[henry]

if its dry then why not use wba, just tell them what they have done is not correct but you will do your best to put it right.

 

[martinemj]

unless it has had sand thrown at it when wet and actually stuck on properly it will blow any backing plaster

the good news is that will have finished,got paid and spent the money by then ..:RpS_wink:

did some work a few years ago for a builder who asked me to render over it with s/c ....told him it would be no good,

when the builder was fired off we got to hack it back off ---thoroseal /replaster


good luck ...

 

[spunky]

Can you dab it with mr boards

 

[authenticlime]

unless it has had sand thrown at it when wet and actually stuck on properly it will blow any backing plaster

the good news is that will have finished,got paid and spent the money by then ..:RpS_wink:

did some work a few years ago for a builder who asked me to render over it with s/c ....told him it would be no good,

when the builder was fired off we got to hack it back off ---thoroseal /replaster


good luck ...

unless it has had sand thrown at it when wet and actually stuck on properly it will blow any backing plaster

Which is the correct answer....
so instead of trying to screw with it with some other solution....simply tell the owner to recoat it with the same material ...toss the sand at it while it is still wet ......then bond and skim

you could even dummy down this second coat by using something that would re emulsify the original coat....basically cut the tar/whatever with some liquid ,make the second coat spread faster and at the same time soften the first coat ...then bradcast sand into it

 

[S a plastering]

unless it has had sand thrown at it when wet and actually stuck on properly it will blow any backing plaster

Which is the correct answer....
so instead of trying to screw with it with some other solution....simply tell the owner to recoat it with the same material ...toss the sand at it while it is still wet ......then bond and skim

you could even dummy down this second coat by using something that would re emulsify the original coat....basically cut the tar/whatever with some liquid ,make the second coat spread faster and at the same time soften the first coat ...then bradcast sand into it

come again lol

 

[authenticlime]

come again lol

in simpleton terms ...recoat the wall with the same black shite throw sand in it and plaster it...jobs done

 

[skimmin2day]

This balck stuff your on about is it mastic ashpahult ot bitumen ???

 

[a.d.plastering]

if you cant betokontakte / wba ) because of sweatin or bubblin & we cant plaster it due to risk of reaction or blowin off imo i would tell the customer the only way around it is hack it all off & driline the bathroom out with mr boards & skim & get a sparky to put an extractor fan to draw any moisture out

 

[rowland gatward]

Thanks guys some good advice.

 

[danjo187]

if its the waterbased stuff it should cover ok, did 1 about 3 years ago painted it on threw abit of sand at it, bonded and skimmed..still good today