ᐅ Bitumen waterproofing membrane on the concrete slab

Not many people use bitumen torch-on roofing membranes anymore; usually, they just install a Katja membrane before the screed and leave it at that.

Bookstar schrieb:

Not many people use bitumen felt membranes anymore; usually, a Katja is installed before the screed and that's it.

Who is Katja?

Knauf Katja Sprint

Bauherr am L schrieb:

Who is Katja?

In hindsight, I probably shouldn't have invested money in those bitumen membranes and should have had fun with Katja instead.

opalau schrieb:

Knauf Katja Sprint

Ah, thanks.

We are also waterproofing the foundation slab with a bitumen layer. It’s probably done by the roofer...

Bookstar schrieb:

Not many use bitumen waterproofing membranes anymore; usually, they just put a "Katja" layer under the screed and that’s it.

Guess what "Katja" is made of.

Whether self-adhesive or heat-welded is up to the installer’s calculation. The technical advantages of self-adhesive membranes only apply to substrates that cannot tolerate the heat from welding.

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