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Primer is ok. Might need to dilute it. Can go over after 24 hours.

Maybe use Mapei renovation then. Do you have a mercardos anywhere close. More choice.

Is it amtico signature , form , Spacia or first ? Does the sub floor have an existing Dpm under it ?

Mercado I’m Aintree sell it and you could get in on my account if that’s closer.

Where are you on Merseyside mate. I’m in Moreton if you need anything.

Ardex NA Will prob need an epoxy Dpm as well.

That’s why going to a shop and looking at display stands and getting professional advice beats internet showing by miles.

You only need to do one coat of liquid Dpm. Fill the hole in with sand and cement on a visqueen sheet lapping up the doorframe. Get it close the height of the main floor. Let that set.

1st thing to do is remove anything loose

Ok fill in concrete then. Then the na over the whole floor at 3mm Fball f77 3kg / ardex DPM1c 3kg Then the underlay & laminate

I can’t see any visqueen Dpm in your pictures ?

3kg Fball F77

Does the rest of the floor gave a Dpm ? How old is your house. How many m2 is the hallway.

You could use a builders rubble bag. Done it loads. It’s to stop any water / moisture getting through under the door frame. Any moisture tolerant compound is fine. Not sure who you spoke to at Mapei as their na is and can go under liquid Dpms. I do my way as it dries quickly.

best way would be remove all that old Dpm Then put some visqueen sheet in and lap it up the door. Then fill in with the Mapei na and granno chips. I’d then Dpm over all that with an epoxy Dpm but you could just screed it all with the na then use a decent underlay with taped joints.

It’s needs a 10mm compound above the pipes.

Take up the floor and underlay. Leave a week Put heating on low for 30 days Moisture test If under 75%RH then relay the floor.

That size 2mm gap on each side should be ok. Use template paper to mar the curved cuts

When fitting loops you use a square / combination square to make sure the loops are straight. The fitter hasn’t done that as it’s running out. If you cut the sides with a loop pile cutter it’s a lot easier.

Bad fitting that. A rushed job.