ᐅ Installing Parquet Flooring – Expansion Gap for Screeds of Different Heights

Created on: 15 Dec 2024 19:20
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xxsonicxx
xxsonicxx15 Dec 2024 19:20
Hello diligent craftsmen,

Today, I spontaneously helped a friend continue installing the hardwood flooring.
Now there is the following issue with the expansion joint of the screed. It has an uneven height, with a difference of about 1mm (0.04 inches).
Unfortunately, it was overlooked to correct this in advance. So a quick solution is needed! Another challenge, as usual.
At first, I thought about using cork in the expansion joint, but that would leave only a small strip of hardwood in between. Or maybe starting the underlay later on the higher side, since the underlay is just a thin moisture barrier, allowing it to align somewhat?
Does anyone have a suggestion or idea for a good solution? @KlaRa?

Many thanks in advance and wishing everyone a relaxing Sunday evening
Wood panel floor on substrate; transition with metal strip visible at the edge

Measuring rod (Löffler) over wood floor; wooden wedges next to concrete/foam substrate.

Measuring tape laid across a wood surface next to an edge of aluminum foil and insulation material.
xxsonicxx16 Dec 2024 09:00
Sorry... it’s a 3mm (0.12 inch) difference instead of 1mm (0.04 inch)... it was late yesterday.
J
Jesse Custer
16 Dec 2024 09:47
Help me out quickly, just so I understand: the height difference between the two screeds is 3 mm (0.12 inches), right?

From my point of view, there are two options:

- ignore it and continue installing
- insert an expansion joint at that spot

However, I lack information to make a decision – is this the transition to another room or a hallway? Why is there a joint in the screed at exactly that location? So many questions.
xxsonicxx16 Dec 2024 10:03
Jesse Custer schrieb:

Just to clarify so I understand correctly: the height difference between the two screeds is 3 mm (0.12 inches), right?

- Yes, that's how it looks.

Ignore it and continue installing.

- Then it will wobble unfortunately, or however you want to call it. The lower board will basically be suspended in the air.

A break with an expansion joint needs to be installed at that spot.

- What happens if the leftover piece of the parquet is only 2.5 cm (1 inch) before the expansion joint? I think it would have to be glued there for durability.

For me, there isn’t enough information to decide— is this the transition to another room or a hallway? Why is the expansion joint in the screed exactly at that spot? So many questions.

- Actually, the questions are not important for deciding how to proceed, because they don’t change the problem.
- It’s not a transition. An expansion joint was installed in the attic floor; don’t ask me why. Possibly because the surface area would otherwise be too large?
J
Jesse Custer
16 Dec 2024 11:16
Oh no – so it’s right in the middle of the room? Good grief.

How many meters (feet) have already been installed? Can you still shift it? If a board is placed directly over the joint, I wouldn’t worry about it. The installer really dropped the ball here.
tomtom7916 Dec 2024 11:27
Honestly, extend at least 50cm (20 inches) beyond the step and then level the slope with filler.