How do I calculate the consumption of self-leveling compound on this floor?

[Grillen]

I have a garage where I'm going to apply self-leveling compound to the floor as it will be converted into a bedroom. But how on earth do I calculate the amount of self-leveling compound needed when the floor is sloped and a bit wavy in certain areas?

If I had used the cheap self-leveling compound from Byggmax, it wouldn't have been so critical. But now I'm planning to use Ardex K39 because it's so easy-flowing and has a long drying time, and it costs nearly 1000 SEK per bag and needs to be ordered, so I don't want to end up buying several bags too many.

How would you pros do it to calculate as accurately as possible since I want to use as little self-leveling compound as possible?

 

[Höghus]

Measure the height you need for the spackle at as many points as you can with a laser. Then take the average of all the measurements = thickness of the spackle layer. Draw a grid pattern on the floor and measure at each intersection.

/Höghus

 

[Grillen]

Measure the height you need for the putty at as many points as you can with a laser.
Then take the average of all measurements = thickness of the putty layer.
Draw a grid pattern on the floor and measure at each cross.

/Höghus

If you don't have a laser, is there any good way to solve it then? Otherwise, I'll have to go rent a laser, simply.

 

[Höghus]

Stretch the masonry line to the height where you want the cake and measure against the line.

/Höghus

 

[Grillen]

Tighten a masonry string at the height where you want the cake and measure against the string.

/Höghus

Thank you for the quick and sensible solutions.

 

[Höghus]

Thanks for the quick and sensible solutions.

That was an answer from a theorist. A real builder will soon respond with something simpler. 😁

/Höghus

 

[Jonas928]

That was an answer from a theorist. A real builder will soon respond with something simpler. 😁

/Höghus

For a "Real" builder, the material doesn't matter. He invoices that. Moreover, it's his time that costs the most.

 

[Grillen]

For a "real" builder, the material doesn't matter. He charges for it. Moreover, it's his time that's most expensive.

But a "real" builder must have some good way to estimate the material usage? At least approximately so they don't need to bring too many extra bags?

 

[Peter787]

For a "real" builder, the material doesn't matter. He invoices it. Besides, it's his time that costs the most.

A real builder HAS a laser and sets level pins so they can achieve an even result.
Then they usually have a mixer with a pump in a van outside where the self-leveling compound is mixed, so it's easy to mix the amount needed.
But as an amateur, rent a laser and set level pins, so you can calculate the required volume.