ᐅ Sealing a Flat Roof – Liquid Waterproofing Membrane

Hello everyone,
we are building a regular rectangular single-family house. However, on the ground floor there will be a sort of cube projecting out.
This results in a flat roof of 75 cm (approximately 10 sq m / 108 sq ft) on two sides.
Is it possible to waterproof this yourself using liquid waterproofing? It sounds quite simple.
Has anyone had experience with this?
Or are there better alternatives?

Thanks for your answers.
Regards

Let it be done by professionals—especially with flat roofs, this is not a job for someone without experience.

Our flat roofs are sealed with EPDM membrane.

The solution with liquid plastic and the associated fleece looks straightforward. Especially if you are skilled at DIY or construction work.

Yes, then just do it that way – so why are you still asking? I already gave you a (very good) alternative.

When it comes to roof waterproofing, especially for flat roofs, I definitely wouldn’t cut corners or experiment...

Actually, you can’t install any of this yourself. It’s classified as a hazardous material and, as an end consumer, it’s not available to you as far as I know. We had it professionally sealed. It’s very reliable, but it didn’t look simple at all. The work has to be done quickly, everything needs to be properly and smoothly applied, and it smells bad and gets extremely hot!

I’m asking because I wanted to hear some experiences. Now I know that it’s not that simple after all.

Today, I’m going to inquire with a roofer.
Thanks for the answers.