Alfa Heavy Anhydrate.

[Rizzle from the Portizzle]

for gods sake again and again this could be solved in a moment if only the screed layers would stamp there floors when layed or after they set with a batch number type and contact email site using batch number on email site to descibe the screed and requirerments to fix tiles even if its been capeted for years the stamp would still be there i will say it this is a deralition of duty by all the gypsum floor layers using tilers as test dummys well we have put a man on the moon but its to much to ask that they stamp there work just what have they got to hide may be they dont now what there doing or dont know what there using on a day to day basis they should be ashamed of there i am all wright jack atrtude its all write ive been paid what do i care for the client or tile fixers after all just got another wod shame of the building trade and you should be ashamed you stink

 

[Spud]

It a mine field at the moment with too many calcium products each with very specific characteristics and each require particular prep work in Europe this simply doesn't apply as the screeners have to prep their floor for tilers

 

[beanz]

Because there is often very fine dust on the surface of these screeds which can interfere with the penetration of primers. Also the screed has been in a construction site for a number of weeks or months and will have surface contamination from extraneous materials e.g. Mud, plaster, mortar, paint etc etc. Also the surface of these screeds can be very hard and very dense which further interferes with the penetration of primers. Sanding opens the surface texture and subsequently provides a mechanical key for said primers etc. it also opens the surface to promote faster drying. I can obviously only offer guidance based on experience and the national and industry best practice codes. It may be that if you tile it you would get away with it and it would not fail. But, if it does, you would stand alone in sorting it out because the first questions you would be asked would include "did you sand the screed as per the instructions of the tiling association guide to tiling to calcium sulphate screeds and as per the instructions on pretty much every bag of tile adhesive in relation to these screeds" I know that is what I would ask....


sanding is is not just to remove Laitance but is to prepare the screed to receive bonded floor coverings...

Giving it a key by hand would suffice for all but the laitance (which may or may not be an issue, as it isn't loose!?!) here. When speaking to Ardex tech about this particular type of screed, they didn't even mention sanding. All they asked was whether the screed takes water, or if it just sits on top. They said if the screed takes the water, you can prime it with an Acrylic primer at 3:1.

 

[beanz]

It a mine field at the moment with too many calcium products each with very specific characteristics and each require particular prep work in Europe this simply doesn't apply as the screeners have to prep their floor for tilers

Which if you listened to the screeder that layed the floor we did a few weeks back, would've consisted of a sweep with a stiff broom.... Lol

 

[Rizzle from the Portizzle]

they run away and run away why ?we stand by our work again and again but where are they to be seen spending there cash and not giving a toss what they leave behind reminds you of our bankers no shame or guilt over who pics up the damamage after all they have there money and are well gone never in building trade have i ever come across a buntch of i realy dont care about my work just the money i make and sod those who follow if you cant stand by your work or leave your mark you are worthless like all of these screed what do they need to hide ? why cant they stamp them are they so ashamed by what they do they should be whats so wrong in saying i did that makes you wonder why they hide the fact of what they laid are they ashamed of what they are doing and dont want anybody to know what they are up to no confedenes in what they are doing if they own up to it well put your stamp if you have one once of honestey between you if not we realy know why and pass that info on to our clients we believe they should only buy products they can trust and not ones who are ashamed to say we did that?

 

[beanz]

I'm not sure about the stamping.. Nobody else in the building trade stamps their work!?! And I don't think you can really lump all screeders together. At least Alan's on here trying to shed some light on the subject.

 

[Ajax123]

It a mine field at the moment with too many calcium products each with very specific characteristics and each require particular prep work in Europe this simply doesn't apply as the screeners have to prep their floor for tilers

But Gary, the prep requirements all calcium sulphate screeds are all the same. In fact if you look at the requirements for the contract flooring association the requirements for all screeds is the same full stop. The only thing that changes is GHD need if not for a primer which is dictated not by the screed but by the adhesive.. I agree in Europe a lot of screeders do the prep but that us primarily because most of the also tile the floors as part of thief artisan contract... Certainly in France and holland anyway.

 

[Ajax123]

they run away and run away why ?we stand by our work again and again but where are they to be seen spending there cash and not giving a toss what they leave behind reminds you of our bankers no shame or guilt over who pics up the damamage after all they have there money and are well gone never in building trade have i ever come across a buntch of i realy dont care about my work just the money i make and sod those who follow if you cant stand by your work or leave your mark you are worthless like all of these screed what do they need to hide ? why cant they stamp them are they so ashamed by what they do they should be whats so wrong in saying i did that makes you wonder why they hide the fact of what they laid are they ashamed of what they are doing and dont want anybody to know what they are up to no confedenes in what they are doing if they own up to it well put your stamp if you have one once of honestey between you if not we realy know why and pass that info on to our clients we believe they should only buy products they can trust and not ones who are ashamed to say we did that?

I wasn't going to grace this with a comment but felt as you have mentioned it twice you wanted a response. Please stop drawing ridiculously over dramatised and generalised inferences from the fact that screeders don't "stamp" their work. Conspiracy theories about what they have to hide are unhelpful and frankly a big silly. Most screeders like most tilers are solid professional tradesmen. Most of them leave information with sites about the screeds they supply. You should perhaps analyse why this information is not passed on. There are some who are less capable just as there are tilers who are less so but generally no one goes out to work to do a bad job and they certainly don't do it to p**s the tiler off. In fact I would suggest that the vast majority of screeds go in before the decision on what coverings are used us made so the reeder probably doesnpt even know tiles will be used... Or even care.... Why should he...he is a screeder not a tiler. That's your job.

To make these sorts of issues disappear we could of course begin encouraging screeders to take on the tiling as well but that would eat into your work wouldn't it....

 

[CJ]

These newer pumped screeds that look like Sand/cement screeds? Is there a way of telling, because not all customers actually know themselves.
They get a building contractor in, then when at roof level they are gone, and the customer phones us.

 

[Ajax123]

These newer pumped screeds that look like Sand/cement screeds? Is there a way of telling, because not all customers actually know themselves.
They get a building contractor in, then when at roof level they are gone, and the customer phones us.

You can usually find out if you ask the questions e.g. Who installed it, who supplied it, was it pumped, how deep is it etc etc. if you really draw a blank on this my advice is treat it as if it is calcium sulphate anyway because generally speaking whatever you do with anhydrite will work on other screed types perfectly well.

 

[Lee@emctiles]

I still like the idea of a stamp or industry standard different colour to a normal sand & cement screed......

that said, i have seen first hand what information Alan (Ajax) leaves with a customer, we have worked together on a recent project, the developer is pretty clued up on what is going on, he has been in contact all the way with alan and tilemaster re screed drying ect ect, so i cant fault gypsol (francis flower) for theback up service.

Small problem now is the developer is wanting to get tiling job started, but the reading on the tramex states its its 0.7% and Tramex have confirmed today that the reading on the middle scale of the CME 4 machine must be no higher than 0.3% with underfloor heating over anhydrite screed. If there is no UFH the reading should be no higher than 0.5%.

 

[Rizzle from the Portizzle]

I'm not sure about the stamping.. Nobody else in the building trade stamps their work!?! And I don't think you can really lump all screeders together. At least Alan's on here trying to shed some light on the subject.

well next time you go on site take a good look you will find every think from plaster board to roofing tiles will be stamped its the law .

 

[Stef]

I started a thread a few months ago about screed identification & I think one of the main things to look for is no expansion through the doors only expansion on the perimeter of the room.

 

[Rizzle from the Portizzle]

I wasn't going to grace this with a comment but felt as you have mentioned it twice you wanted a response. Please stop drawing ridiculously over dramatised and generalised inferences from the fact that screeders don't "stamp" their work. Conspiracy theories about what they have to hide are unhelpful and frankly a big silly. Most screeders like most tilers are solid professional tradesmen. Most of them leave information with sites about the screeds they supply. You should perhaps analyse why this information is not passed on. There are some who are less capable just as there are tilers who are less so but generally no one goes out to work to do a bad job and they certainly don't do it to p**s the tiler off. In fact I would suggest that the vast majority of screeds go in before the decision on what coverings are used us made so the reeder probably doesnpt even know tiles will be used... Or even care.... Why should he...he is a screeder not a tiler. That's your job.

To make these sorts of issues disappear we could of course begin encouraging screeders to take on the tiling as well but that would eat into your work wouldn't it....

problem there is they would probaly leave without grouting or sealing the tiles .can you give me one good reason why you wont leave a stamp mark on your work ?why is that to much to ask

 

[Ajax123]

problem there is they would probaly leave without grouting or sealing the tiles .can you give me one good reason why you wont leave a stamp mark on your work ?why is that to much to ask

Cost?? Common sense?? Not my work?? Lots of reasons really.....