gyvlon floor and I am the bad boy!

[Ajax123]

Well the latest reading is 96% !!!
I am off the job now and have spoken to the client who is very understanding now. I assume he has been checking up on the info I have been giving him.
At this point I have put it in writing that I feel a carbide bomb test should be done and the best way forward will be to contact the screeder to get this sorted.
The client agrees and as I type this he is chasing them for an answer.

Just to put my mind at rest about the hygrometer I will be testing it on a section of floor in my house.....just out of curiosity .

For further jobs I will have a letter printed off, and it will say that it willl be the responsibility of the screeder or client to obtain a satisfactory test before I start tiling.

just a couple of questions before you go... I assume the screed was it heated during the testing I.e. the ufh was not on. And also, not to do with you i know, but is there an effective damp proof membrane under the screed. It should be built as substrate then 1200gauge membrane, insulation, 500gauge slip membrane, then pipes then screed.

To go the whole hog with letters it would hphe useful to get a written instruction to start which says that they have tested and it is dry... Perhaps you should get them to sign a pre printed sheet before you start.

 

[Gazzer]

This floor wasnt heated..ie no UFH installed. no heat in the house at all at the moment.
I can only assume the screeders did the job correct, I dont have xray vision. I am told it was Lafarge Gyvlon Low laitance and the screeders are known to you. I know this because we exchanged PMs a while back on another job.

 

[Ajax123]

Good stuff. No reason to think the reading is not accurate then. However it is worth noting that whilst the low laitance version has its advantages we have seen a number of instances where high humidity readings have not been corroborated by carbide bomb tests so I think you are right to go that way.

 

[mz30]

hygrometers ,carbide bomb tests ??????????? am at a loss !!!!

If the job is getting that involved i think i will retire early,what happened to the old sand and cement screed and fitting on the same day?

 

[Rizzle from the Portizzle]

hygrometers ,carbide bomb tests ??????????? am at a loss !!!!

If the job is getting that involved i think i will retire early,what happened to the old sand and cement screed and fitting on the same day?

well it seems that fixing in to wet sand and cemment the same day. grouting the next. walk on the next .was far to slow?so they bought out a screed that self levels? to speed things up ?that cant be tiled for guess how long ?who realy knows .with failure after failure .over 10 years now and still going wrong .well give me sand and cemment fixing any day never had one fail ever .and can screed and tile 20 to 30m2 in a day. 5 us layed 120 m2 sceeded and tiled the same day no problems

 

[Spud]

well it seems that fixing in to wet sand and cemment the same day. grouting the next. walk on the next .was far to slow?so they bought out a screed that self levels? to speed things up ?that cant be tiled for guess how long ?who realy knows .with failure after failure .over 10 years now and still going wrong .well give me sand and cemment fixing any day never had one fail ever .and can screed and tile 20 to 30m2 in a day. 5 us layed 120 m2 sceeded and tiled the same day no problems

you forgot to mention that it is guaranteed 100% solid bed fixing too but as we all know there is too much money invested in the adhesive industry for anyone to suggest we rethink how we are currently fixing tiles ,i used mapei topcem last week as a replacement for ordinary portland cement while doing a samall 5m2 sand and cement laid balcony and it was really impressed it and will definitely use it again

 

[Ajax123]

Lafarge have just published this which might be of interest.

YouTube - Broadcast Yourself.

 

[Dan]

Just bumping some of the older popular (sometimes not so popular) threads. Probably wont be current discussion these days but I just need to do it. So just ignore the thread if it's not current for you.

 

[jonnyc]

I never fix stone or porcelain unless ditra used. Equally I only use tilemaster anhyfix to fix ditra and then use use seta flex on top

 

[Dan]

I never read this originally and have now, interesting read! Might sticky this.