Bitumen welding membrane on ground slab

Not many people make bitumen waterproofing membranes anymore; mostly they just put a Katja in before the screed and that's that.

Not many people do bitumen waterproofing membranes anymore, usually just put a Katja under the screed and that's it.

Who is Katja?

Knauf Katja Sprint

Who is Katja?

I should have better not invested money in those bitumen sheets back then and instead had fun with Katja

Knauf Katja Sprint

Ah, thanks.

Here, the base slab is also sealed with a bitumen layer. I guess that's done by the roofer...

Not many do bitumen waterproofing membranes anymore, mostly just put a Katja down before the screed and that's it.

Guess what the "Katja" is made of

Whether self-adhesive or welded is up to the processor's calculation. The self-adhesive only has technical advantages on substrates that cannot tolerate the temperature of welding.

By the way, the work is for fools. Anyone interested in doing it themselves can easily spend a weekend on this.