Egg crate lifting on corners

[SB2023]

Hi all

Having a mini meltdown in a race against the clock for screeders coming.

We were specified egg crates upstairs as we only have 20mm insulation and none in some areas.

I am laying the pert pipe and absolutely losing my mind.

Every 90 degree corner I do causes the egg crate to lift. It goes back down easy enough if I press it but obviously it can't be like this for the screed.

Am I missing a trick?

Appreciate any insight!

[Mike]

I'd try adding some standard UFCH pipe staples. The minimum length is probably 40mm, so if you only have 20mm of insulation you'll need to staple over the pipe, though the crate and into the insulation. And you'll need to punch a pair of holes through the crate first for each staple. Hopefully the insulation won't lift too, but if it does you'll have to add some temporary bricks.

 

I guess you're using a liquid screed - if so pouring it from the centre of the floor will also hopefully help to flatten everything and allow you to take out the bricks.

[SB2023]

Thought I would update this in case anyone stumbled upon it...

 

Trick 1: don't roll the pipe behind you over your shoulder, this naturally makes it bend up.... Keep the pipe coil laid flat and roll out it out from the side. This is why UFH companies have those decoiler things!

Trick 2: I used some large round plastic insulation washers and concrete screws to hold the really bad bits down into the concrete slab.

Trick 3: as Mike said above, punch through some UFH staples. This works well when not near corners where it could lift the whole insulation and crate up.

Trick 4: don't stress too much. One water is in and the screed goes over, you wonder why you worried so much....

Trick 5: don't use egg crates!