Help needed please with renovation screed

[alan71]

Hello I'm a new member so please be gentle. I'm tiling a small bathroom floor I,ve got a problem regarding primer I,d be glad of any help as i'm not a pro. Do I really need to use a primer when using Ultraplan renovation screed ? I'm covering UFH cables which are on Fastwarm insulation boards. What do the experts do or use? Any help would be great.

 

[Mike]

Hello I'm a new member so please be gentle. I'm tiling a small bathroom floor I,ve got a problem regarding primer I,d be glad of any help as i'm not a pro. Do I really need to use a primer when using Ultraplan renovation screed ? I'm covering UFH cables which are on Fastwarm insulation boards. What do the experts do or use? Any help would be great.

i've never used those boards but it says that no primer is needed Fastwarm® Insulation: Suitable For All Floor Heating Systems

 

[alan71]

Thanks for the reply Mike. I've seen the info on the insulation boards, my problem is mapei advise using Eco Prim Grip as a primer it seems quite expensive and not so easy to get hold of. What I'm asking is would a pro use the primer or not when using Ultraplan renovation screed ? And would BAL

 

[kilty55]

i would advise using the reccomended primer the manufacturer suggests,who ever sold you the renovation screed could no doubt get you eco prime in ,i am assumign they have told you the cost of it already?

you could aof course check out diff companies like bal etc and see what they offer in way of materials that are similar for your job

 

[Mike]

or you could phone mapei technical and see if they're happy you laying the slc without their primer (as per insulation board instructions) but chances are they'll say to prime just to sell their products.

 

[alan71]

Thanks for the replys does anyone use this SLC and what do you use to prime or not ? I've seen posts using the SLC but no mention of the primer used. Would BAL prime APD do the job ? Mapei would only recommend their own products.

 

[kilty55]

eco prim is what i would advise you use and yes i have used it with renovation screed,

 

[Mike]

i use renovation screed for every slc job now and can't praise it enough although i've not used the forementioned boards so it's hard to call but if you want to make sure and be covered, as i said previous phone mapei tech dept. good luck with it

 

[DHTiling]

A good alternative bonding agent is SBR... i know some boards say no primer required but they can get dusty etc from fixing and walking across them whilst installing UFH..

 

[alan71]

Thanks. I have spoken to mapei they recommended their own product but its expensive and I'll have to order it so it'll delay the job which I'm trying to avoid. The insulation board seems to be the same as other manufacturers it's a polystyrene core with a cement coating. What do you all use with other makes of insulation board ?

 

[kilty55]

eco prime if its renovation screed

maybe you can try and change your slc to a diff brand at the shop? one that has a primer ready to buy of the shelf?