Are lift-and-slide doors generally less airtight?

Our house builder does not strongly discourage us, but said he wouldn't necessarily do it because with lift-and-slide doors and severe storms you can sometimes have some water inside.

Setting a gutter is therefore sufficient, for example. In practice, this is often neglected.

What does he want to install instead?

Thank you for your contributions!

Thanks for your posts! They give me courage to assert my will :cool:.

I will keep that in mind! Thanks!

A normal casement window plus fixed glazing... Somehow, we are leaning more towards the sliding lift door :)

I don't have any experience yet, but we are getting 3 sliding lift doors in the living-dining room (2 x 2.50 m wide and 1 x 3 m wide) and neither our general contractor nor our building expert has advised us against it in any way..