How to go about installing a window sill/pot stand

[FredWork]

Hello and greetings for the New Year!

I had a question: How can I best go about installing a wooden window sill to this laundry room window. I just want it for some extra space for a potted plant.

Few points/questions to note:
-  the taps worry me about drilling holes.

- The child lock on the window is around 1cm above the concrete surface. So I'm assuming that's the max height of any wood that can be installed that does underneath that lock

- If no screws are used, I was initially wondering about using https://www.bunnings.com.au/poly-320g-ultra-nails-construction-adhesive_p1230092 to glue the wooden board to the bottom of the sill. Does this sound practical?

- This is an apartment wall, so it's concrete.

Thanks in advance. Any ideas would be highly appreciated!

-- Fred.

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[MitchellMc]

Happy New Year @FredWork!

For your wooden window sill installation, given the 10mm height restriction and the concrete wall, I recommend using 9mm plywood. This thickness should be suitable for supporting a lightweight potted plant, and you can easily cut it to the desired width. If needed, our team can help with cutting it to size in-store if the width required is in a 100mm increment, such as 200mm wide. 

Regarding adhesive, the Poly 320g Ultra Nails construction adhesive you mentioned is a good choice for securing the sill, and it should hold well as long as the weight of the plant is distributed centrally. I’ve installed a similar shelf with just friction, but gluing would offer more security. If the 9mm plywood looks a bit thin from the front, you can add a moulding around the edges to give the impression of a thicker, more substantial shelf. This will also help improve the aesthetic and make the sill look more polished. 

Please let me know if you have any questions.

Mitchell

[FredWork]

Thanks @MitchellMc , that gives me a lot more confidence!