Substrate Raising

[Ajax123]

At 100mm I'm hoping its sand cement. Not a very efficient way to use underfloor heating but still pretty common.

 

[Ajax123]

ok here you go sub the job out to tilers who know how to fix in wet sand and cement should be no problem for them this will save you over £41 m2 in levelers decouplers adhesive labour before you lay a tile sit back watch how it should be done and make a few grand and save the same for your client

But he's only got 25mm to play with. For a cement sand bedding I would expect around 40mm.

 

[Ajax123]

Ok widler I've worked out a rough price for 100 m2 of ts15 at 15mm and I reckon you'd have quite a lot of change out of £1500. So cheaper than levelling compound. That would include materials, labour and pump.

 

[Just Rizzle]

you could stick down ditra mating to decouple the floor and lay a 25mm sand and cement bed on top of mat total material cost approx.£1000 PAY YOU SELF EXTRA 500QUID your quids in plus floor usable in 2days after laying

 

[Ajax123]

you could stick down ditra mating to decouple the floor and lay a 25mm sand and cement bed on top of mat total material cost approx.£1000 PAY YOU SELF EXTRA 500QUID your quids in plus floor usable in 2days after laying

The standard for tiling calls for sand cement beds to be laid bonded to a fully prepared slab which has been mechanically abraded so there goes the £500 saving. It will cost at least that to hire a sander or shot blast machine. It then says that the cement sand bed should be bonded using a cement slurry with a polymer dispersion primer e.g. acrylic primer.... to be fair it does actually say the bed should be 20mm deep and not 40mm as I had thought. If you stick down ditra...that's an extra 6mm with the mat and the addy. That only leave you 19mm for bedding. Ditra is designed as an uncoupling membrane. It wont offer any protection from the sand cement bed curling or shrinking which at 19mm I would suggest it would do both quite liberally.

 

[Rizzle from the Portizzle]

if this is a sand and cement screed it will already have an abraded surface by its nature so you can aproach this in two ways why would i want to decouple the floor when i want it to act as one so wet slurry screed now tile knowing the tile will double the strengh laid into wet sand and cement or you could put down exspanding metal not raising the hight slurry screed then tile still bineded as one layer but with a bit more scope with dealing with the ufh

 

[Ajax123]

if this is a sand and cement screed it will already have an abraded surface by its nature so you can aproach this in two ways why would i want to decouple the floor when i want it to act as one so wet slurry screed now tile knowing the tile will double the strengh laid into wet sand and cement or you could put down exspanding metal not raising the hight slurry screed then tile still bineded as one layer but with a bit more scope with dealing with the ufh

No it won't!! I would love to see the science behind some of your claims.... How does the tile double the strength laid into a wet bed. And what is the point of the expanding metal?? Think I'm going to leave this thread now before I say something I'll regret.

 

[Just Rizzle]

WHAT IS THE SUBSTRAIGHT THE UFH IS LAID IN?
TILL WE KNOW THISTHEN NO ADVICE IS RELEVENT

 

[Rizzle from the Portizzle]

No it won't!! I would love to see the science behind some of your claims.... How does the tile double the strength laid into a wet bed. And what is the point of the expanding metal?? Think I'm going to leave this thread now before I say something I'll regret.

ok regret so regret away lucky for me here when i was at school many years ago i made sand and cement blocks then we had to test there breaking strenght by adding weight in the middle intill they broke if i did the same today made some with screed only. then some tiled. and then some tiled with exspanded metal each would prove you wrong and whats more i will do this and post pics all the way and i suggest you do the same if you are so sure.with out the know how science does not move forward only fools

 

[Rizzle from the Portizzle]

No it won't!! I would love to see the science behind some of your claims.... How does the tile double the strength laid into a wet bed. And what is the point of the expanding metal?? Think I'm going to leave this thread now before I say something I'll regret.

and if you would like to send me 25mm x50 mm x150mm bit of your sceed i will test that to and all are welcome to test the out come with me

 

[Dan]

I love the passion we have for our jobs in life. But it's really all nothing in the grand scheme of things.

This is the sun. Our sun, as we know it. You can't even see it in this image that is an artists impression of what just our one galaxy is possibly like. We don't know what it actually looks like because we've got nothing that can see in. The sun is in one spiral 'arm' of many. And tech we fired out in the 60's wouldn't have eve reached the edge of that one spiral arm.

Let's not fall out over a floor today.

 

[Ajax123]

Youre right Dan.

Forget the testing Ray I know the compressive and flexural strength of our screeds so don't need you to test them for me. We already do that on a daily basis. You have you're opinions and I mine. We are both entitled to them and if they differ well it perhaps adds to the rich tapestry that is life.

 

[Rizzle from the Portizzle]

I love the passion we have for our jobs in life. But it's really all nothing in the grand scheme of things.

View attachment 73311

This is the sun. Our sun, as we know it. You can't even see it in this image that is an artists impression of what just our one galaxy is possibly like. We don't know what it actually looks like because we've got nothing that can see in. The sun is in one spiral 'arm' of many. And tech we fired out in the 60's wouldn't have eve reached the edge of that one spiral arm.

Let's not fall out over a floor today.

well there some think here i am working on here will blow the tile world away .and at the end of the day only the truth and nothing but the truth can be proved .i will never fall out with any body who drives me to the truth they can only stand as my heroes by making me think

 

[Rizzle from the Portizzle]

Youre right Dan.

Forget the testing Ray I know the compressive and flexural strength of our screeds so don't need you to test them for me. We already do that on a daily basis. You have you're opinions and I mine. We are both entitled to them and if they differ well it perhaps adds to the rich tapestry that is life.

ok i will do my test with a 10mm tile and a 4,8mm and test from the tile and the screed .do the same and test the added strenght the tiles give your screed .why would you not want to know the answer it should give you a great selling point .every day is a leaning day for me make it the same for you

 

[Rizzle from the Portizzle]

have been very busy today tilling giving glass a run for its money won hands down should finish tomorrow if left alone .and post some pics .but then i will move on to the test of screed and the tile strenght added if any one out there is going to be on site while an anhydrite screed is being laid could you send me a sample 25mm d 50mm w 150mm L it does not mater if they a bigger i can cut them down but it would not be ufair of me not to include these i would like four peices if poss or one lump i can cut down i will have them picked up or pay for postage or if you bring them in i will give you the best thin tile cutter in the world for free and train you on using it .we can all learen from this .thanks for your help in helping tiling move forward