Floorboard to concrete floor

[Mad Hatter]

I've just been to look at a job tonight 21 sq/m of flooring.

It an existing kitchen that has floorboard down and a new extension that has had concrete pumped into it for the floor, this has been levelled to the height of the floorboards in the kitchen.

My plan was to use 6mm Hardickers on the floorboard but the customer isn't happy about the step(rightly so) as it's a throughway from the kitchen and he wants one level from the kitchen into the throughway and then to his utility room. Would self-levelling compound do the trick and what's the score with putting it down as I've never done it before and building that gap up by 6mm so that it is level with the Hardicker. Also how long would you wait until you can tile over the self leveller?

I could do with some advise guys as they want a price ASAP

Thanks in advance

MH

[grumpygrouter]

If the floorboards are solid then the hardie will be fine. You could use Mapei Fiberplan to level up to the height of the Hardie but you will need to put in an expansion joint between the 2 substrates. You can tile on the Mapei fiberplan after about 4 hours.

[whitebeam]

If the boarded floor is solid, No bounce then could'nt you use a decoupling membrane

[grumpygrouter]

You should still carry through a movement joint though........

[Mad Hatter]

Cheers grumpy, I was actually thinking about putting an expansion joint where the different substrates meet.

With the leveller is it just a case of mixing it and then pouring it or does it need spreading with a trowel? I'd have three areas in the extension that would need doing, the throughway, a small toilet area just off the through way and a utility room.

Sorry for all the questions but roughly what price is the fiberplan and what area does a bag cover bearing in mind I need to increase the substrate to 6mm?

[whitebeam]

grumpy

[grumpygrouter]

Cheers grumpy, I was actually thinking about putting an expansion joint where the different substrates meet.

With the leveller is it just a case of mixing it and then pouring it or does it need spreading with a trowel? I'd have three areas in the extension that would need doing, the throughway, a small toilet area just off the through way and a utility room.

Sorry for all the questions but roughly what price is the fiberplan and what area does a bag cover bearing in mind I need to increase the substrate to 6mm?

I recently had a demo of Fiberplan from the Mapei reps when they visited Inverness. Extremely impressive stuff and it is truly self levelling with only a minimum of trowel work. It will level to 10mm in 1 pour if required.
For consumption, Mapei say 1.6kg/m2 per mm thickness so for your situation about 9.6kg/m2. A full bag correctly mixed should weigh in around 32kg so you are looking at around 3.5m2 per bag at 6mm depth. i think CTD so it for around £20 a bag.

[Dave]

It's about £25 a bag russ....

[grumpygrouter]

It's about £25 a bag russ....

Yep, about right Dave, just found my jotted down prices, my discount gives mee £22.30 + good old VAT. Bit cheaper for me from today then....

[grumpygrouter]

It's about £25 a bag russ....

Yep, about right Dave, just found my jotted down prices, my discount gives me £22.30 + good old VAT. Bit cheaper for me from today then....

[Mad Hatter]

Cheers chaps, top stuff as usual.

I'm at CTD in the morning so I will check the prices then.

The price on this job is esculating!

[whitebeam]

It always does mate, Bits here and there are always a cost factor to any job

[sWe]

I recently had a demo of Fiberplan from the Mapei reps when they visited Inverness. Extremely impressive stuff and it is truly self levelling with only a minimum of trowel work. It will level to 10mm in 1 pour if required.
For consumption, Mapei say 1.6kg/m2 per mm thickness so for your situation about 9.6kg/m2. A full bag correctly mixed should weigh in around 32kg so you are looking at around 3.5m2 per bag at 6mm depth. i think CTD so it for around £20 a bag.

Um, are you sure they mean 1.6kg powder+water/m2? Cuz I'm pretty sure they mean 1.6kg powder/m2, which means 2.6m2 per bag at 6mm thickness.

Following the specs:

25kg powder
6,25kg (l) water
31,25kg when mixed.
Density of mix is 1,9kg/l
One bag yields 16,5l

1mm/m2 = 1liter
6mm/m2 = 6liters

16,5l/6mm = 2,75m2

According to my calculations, one bag covers about 2,75m2 @ 6mm following the technical specs, which is roughly in line with 1,6kg mm/m2 stated in the spec (25kg powder covers 2,6m2 @ 6mm using the 1,6kg powder mm/m2 value).

[grumpygrouter]

Um, are you sure they mean 1.6kg powder+water/m2? Cuz I'm pretty sure they mean 1.6kg powder/m2, which means 2.6m2 per bag at 6mm thickness.

Following the specs:

25kg powder
6,25kg (l) water
31,25kg when mixed.
Density of mix is 1,9kg/l
One bag yields 16,5l

1mm/m2 = 1liter
6mm/m2 = 6liters

16,5l/6mm = 2,75m2

According to my calculations, one bag covers about 2,75m2 @ 6mm following the technical specs, which is roughly in line with 1,6kg mm/m2 stated in the spec (25kg powder covers 2,6m2 @ 6mm using the 1,6kg powder mm/m2 value).

No, not sure I am correct sWe, just my interpretation of the data sheet info. It says you need 1.6kg/mm/m2 so just assumed they are talking about mixed volumes and weights.