ᐅ What material should be used for the door threshold – Are there any issues to consider?

Can someone tell me which material is used here



for this type of door threshold and if there’s anything to watch out for to avoid problems.

Thank you very much

OK, anything special besides that? Membrane, sealant, etc.?

I would cut in EPS insulation, install edge insulation strips around the door, and pour a cement screed. I don't see any problem.

What do you mean by cutting into the EPS insulation? Do you have an example photo?

Bookstar schrieb:
I would cut in EPS insulation, install edge insulation strips at the door, and fill with cement screed. I don’t see any problem.

In room corners, around pipe penetrations, or under old removed radiators, I would approach it similarly, but be cautious in the front door area.

At the cut edge in the floor towards the house, under the screed, you will see the insulation material used in the rest of the house. It’s best to use the same insulation type with the same thickness so that the heights match. For a new build, you hopefully already have this information. In any case, the insulation should have similar compressive strength (specified in kPa) to the existing material.

Simply filling with screed concrete without preparation can and will cause cracks in the screed at this joint (door threshold area), and unfortunately may also lead to cracks in the floor covering above, especially with tiles.

For repairs, I recommend using epoxy resin mortar with a suitable primer applied to the cut edge of the screed. Edge insulation strips are, of course, a must.

You can also install a vapor barrier membrane underneath, although connecting this to the existing membrane under the remaining screed can be difficult. More important is a sealed connection under the door! The space between the door and the floor slab must be airtight and vapor-tight, either with an appropriate sealing tape or a suitable acrylic or other sealant. Whether a seal already exists there is unfortunately not visible under the construction debris.

1. Remove and vacuum out the rubble from the channel.
2. Seal the door threshold at the transition to the floor slab—up to the reveal!
3. Insert matching insulation (thickness and compressive strength).
4. Glue edge insulation strips to the door and side walls, extending about 1cm (0.4 inches) above the screed edge.
5. Prime the cut edge according to manufacturer instructions.
6. Apply epoxy resin mortar and allow to cure.
7. Install the floor covering and have the floor installer professionally seal the joint between floor and door threshold.