Re: Tilling on a floor with Karndean already on floor & underfloor hea
sounds like a nightmare to me ,and one i would proberly pass on....
sounds like a nightmare to me ,and one i would proberly pass on....
Tilling on a floor with Karndean already on floor & underfloor heating
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Y
ythan
Re: Tilling on a floor with Karndean already on floor & underfloor hea
so the heating cables are buried 70mm? - blimey, must take a long time for the floor to heat up, must be on all the time in winter.
still that means that the heat should be well distributed within the floor and there should be no local hot spots. also means should be little risk of damage to the cables should you decide to remove the karndean.
but I'd keep the job simple i.e. thoroughly clean the karndean, then use BAL single part fastflex. key thing is to follow the mixing instructions, and get a good even bed of adhesive.
I'm sure the job will be a good'un.
I'm assuming the other 1/3rd of the room is similar substrate to the newer 2/3rds part.
so the heating cables are buried 70mm? - blimey, must take a long time for the floor to heat up, must be on all the time in winter.
still that means that the heat should be well distributed within the floor and there should be no local hot spots. also means should be little risk of damage to the cables should you decide to remove the karndean.
but I'd keep the job simple i.e. thoroughly clean the karndean, then use BAL single part fastflex. key thing is to follow the mixing instructions, and get a good even bed of adhesive.
I'm sure the job will be a good'un.
I'm assuming the other 1/3rd of the room is similar substrate to the newer 2/3rds part.
Re: Tilling on a floor with Karndean already on floor & underfloor hea
forgive me if I'm reading this wrong but you seem to be seeking blessing to tile in a way that it should not be done on a substrate that is potentially poor. I have said the reasons why i Believe the risks to be present. I think you should take up the karndean, repair the screed as appropriate and then tile. Karndean is not considered a suitable substrate for tiling by an national or international standards that. Am aware of. Cold as it may seem I am completely un sympathetic to the thoughts or wants of the client or the time it will take to do the job. The cost is irrelevant. In order to do it correctly it costs what it costs and takes as long as it takes. If the client cannot afford to do it properly you have to decide if the risk outweighs the benefit. In my opinion based purely on what you have said it does. Regardless of any conversations or "agreements" you reach if it fails the client is likely to come after you as the tiler. You as thetiler having failed to meet the minimum requirements of the appropriate standards would be considered in law to be liable.
The fact it is electric cable underfloor heating is not relevent. It will be either a 6mm or 10mm Devi type system which is perfectly suitable subject to the temperature being controlled by floor stats rather than room stats.
It really is up to you though.
forgive me if I'm reading this wrong but you seem to be seeking blessing to tile in a way that it should not be done on a substrate that is potentially poor. I have said the reasons why i Believe the risks to be present. I think you should take up the karndean, repair the screed as appropriate and then tile. Karndean is not considered a suitable substrate for tiling by an national or international standards that. Am aware of. Cold as it may seem I am completely un sympathetic to the thoughts or wants of the client or the time it will take to do the job. The cost is irrelevant. In order to do it correctly it costs what it costs and takes as long as it takes. If the client cannot afford to do it properly you have to decide if the risk outweighs the benefit. In my opinion based purely on what you have said it does. Regardless of any conversations or "agreements" you reach if it fails the client is likely to come after you as the tiler. You as thetiler having failed to meet the minimum requirements of the appropriate standards would be considered in law to be liable.
The fact it is electric cable underfloor heating is not relevent. It will be either a 6mm or 10mm Devi type system which is perfectly suitable subject to the temperature being controlled by floor stats rather than room stats.
It really is up to you though.
D
DHTiling
Alan , give up it is a lost cause. Some seem to know better.
We shall await the failure.
Sent from my iPhone using Tapatalk
We shall await the failure.
Sent from my iPhone using Tapatalk
Y
ythan
Re: Tilling on a floor with Karndean already on floor & underfloor hea
please all the tilers who are totally convinced that tiling over karndean is a total no go - can any of you describe, in a bit of detail, the failure modes that you're predicting?
a forum should be a place for discussion. don't just go off in a huff.
please all the tilers who are totally convinced that tiling over karndean is a total no go - can any of you describe, in a bit of detail, the failure modes that you're predicting?
a forum should be a place for discussion. don't just go off in a huff.
Re: Tilling on a floor with Karndean already on floor & underfloor hea
No one is going off in a huff, someone has asked for opinions and they have been Given. Nearly everyone has said it should come up, which to do the job correctly it should. There is only so long people will bang their head against a brick wall before they give up.......
No one is going off in a huff, someone has asked for opinions and they have been Given. Nearly everyone has said it should come up, which to do the job correctly it should. There is only so long people will bang their head against a brick wall before they give up.......
G
Gazzer
Re: Tilling on a floor with Karndean already on floor & underfloor hea
I really think you need to contact adhesive manufacturers , If one say that you can do it then "knock your self out."
I really think you need to contact adhesive manufacturers , If one say that you can do it then "knock your self out."
R
Rookery
Re: Tilling on a floor with Karndean already on floor & underfloor hea
Thats what I did when faced with this situation a year or two ago. I spoke to BAL TAS and they said that providing the karndean was well fixed and I cleaned it well, it was ok to tile onto with BAL PTB Flex. So I did.
Y
ythan
Re: Tilling on a floor with Karndean already on floor & underfloor hea
[h=2]single part fastflex[/h]
[h=3]Single part fastflex[/h] USE FOR:-
Most types of FLOOR tiles including:
[h=2]single part fastflex[/h]
[h=3]Single part fastflex[/h] USE FOR:-
Most types of FLOOR tiles including:
- Ceramics
- Porcelain and fully vitrified tiles
- Mosaics
- Natural Stone including marble
- Slate
- Asphalt (suitable grade e.g. flooring)
- Concrete, cement:sand screeds and rendering
- Existing vinyl tiles, unglazed ceramic tiles, quarry tiles, terrazzo and natural stone
- Fibre reinforced cement boards and lightweight tile backer boards
- Tongued and grooved floorboards
- Underfloor heating
D
DHTiling
Re: Tilling on a floor with Karndean already on floor & underfloor hea
Bal say it is good to go then go for it.... BUT when it fails , then see what response you get from Bal..
I shall not input anymore as cannot really add to the majority and cannot be assed to argue why with those that say it should be done... so as said above .. knock yourself out and don't complain when it does go **** up.
Bal say it is good to go then go for it.... BUT when it fails , then see what response you get from Bal..
I shall not input anymore as cannot really add to the majority and cannot be assed to argue why with those that say it should be done... so as said above .. knock yourself out and don't complain when it does go **** up.
