ᐅ Issue with Calculating the Parapet Height When the Worktop Runs Into the Window

Christian NW schrieb:
... It would be great if we could get back to my original question ...

Sure: forget it.

You can’t precisely calculate how inaccurately the masonry will be done. You will have no choice but to determine the exact sill height after the kitchen floor tiles are finished; and also have the window installer measure the window accordingly afterwards. Masons are, first of all, not precision craftsmen, and second, they work before the screed and floor installers. So they can at most take into account the planned buildup height of the floor mentally, if they work on the shell before the flooring layers are applied.

It is also possible that they finalize the sill height afterwards: for example, if you want 97 cm plus an 18 cm floor buildup totaling 115 cm, they might first lay four full rows of bricks (around 100 cm) and later decide whether to cut the other bricks to 15 cm height or adjust otherwise.

But calculating everything so precisely that you could give all parties their exact working dimensions before the foundation is laid would be the classic case of "counting your chickens before they hatch." And when it comes down to it, the exact decimals don’t matter.

The window installer will have to work a bit differently here because kitchen countertops are usually thicker than window sills; and you probably won’t want this sill height as a standard dimension for all your windows.

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Then find out what type of windows you have. Ours don’t have an additional profile underneath. They rest on brackets with the lower frame, and the countertop fits against them.

Hi,
we also set the kitchen countertop height to 97 cm (38 inches) because we’re both tall and it’s a great height.
However, on the side of the house, the second window has the same sill height—it’s the living room window—so it looks uniform from the outside.

In our case, the kitchen designer spoke directly with our builder (who uses a timber frame), and they calculated the sill heights based on the windows we chose.
Although we did a lot ourselves, I would always recommend that all three parties meet or coordinate to avoid any issues.

Best regards, Tina

Caidori schrieb:
However, on the side of the house, the second window has the same sill height as well; it is the living room window, so from the outside it looks uniform.

You get almost the same effect by dividing the living room window vertically, adding a fixed "flower box" section below the opening sashes.

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Thank you for your responses. I realize now that it's more complicated than I initially thought. Let's see how I can manage to implement it. I will try to coordinate with everyone involved.

Christian NW schrieb:
Thank you all for your responses. I can already see that this is more complicated than I thought. Let’s see how I can make it work. I will try to coordinate it together with everyone involved.

We calculated it like this: 10cm (4 inches) legs, 78cm (31 inches) kitchen cabinet body + 3cm (1 inch) thick countertop results in a height of 91cm (36 inches). Our shell construction contractor then set the window sill height to 104cm (41 inches) (104 minus 17cm (7 inches) floor buildup), which results in a finished height of 87cm (34 inches). The countertop is then placed on a substructure, and we ended up with our 91cm (36 inches) finished height. The window fabricator measures the rough opening and builds up the lower frame side higher so that there is a frame of equal thickness—about 5cm (2 inches)—all around the window later on.

With your kitchen working height of 97cm (38 inches), you need to consider that most suppliers only offer cabinet bodies up to 78cm (31 inches) height, and then you end up with a 17cm (7 inch) high baseboard, which may not look as neat if that matters to you.

Best regards
Sabine