cold asphalt on basement wall

[Mike77]

I'm in the process of redoing the drainage around half of the house where it hasn't been done, and will also be putting up a plastic membrane and insulation on top of that. Now to the question: the old moisture barrier needs to be removed, but how can I do this easily without renting a blaster? I've dug 15 linear meters by hand, so a simple method would be appreciated. Grateful for all answers, simple or not.

 

[Pysslarn]

Hello and welcome to the forum!

Take a look at this thread for some tips:
http://www.byggahus.se/forum/grund-...asfalt-fran-kaellarvaegg-samt-draenering.html

Good luck!
Best regards,
Ronnie

PS Your question is in the wrong place, there is a subforum called "Grund- och markarbeten" but I think the moderator will place it correctly. DS

 

[MathiasS]

If you're going to have a platonmat, there's probably no point in trying to remove the asphalt. I don't even think the instruction for Platon shows that. You will have 100% RH between the platonmat and the wall anyway, so no moisture transport occurs... Just my two cents...

 

[Mike77]

Talked to them at isola and at least 70% needs to be removed for the moisture in the wall to be able to go out and condense on the mat, and then run down to the drainage pipes. Time to go at it with the angle grinder. Thanks for all the answers, now I have something to keep busy with.

 

[MathiasS]

I think it's a waste of time. The space behind the platon is not sufficiently ventilated to lower the vapor pressure enough for the wall to dehumidify. It's sealed all around.

 

[Mike77]

So you think it's just a matter of going ahead with membrane and mat? I was thinking of using their drainage layer as well to get some insulation on the outside.

 

[MathiasS]

So you think it's just a matter of going ahead with the membrane and mat? I'm thinking of using their drainage layer too, to get some insulation on the outside.

Yes, that's what I THINK, but I've mostly talked to Isodrän/pordrän people so I might be completely deceived...

A bit of insulation outside the mat + geotextile is never wrong.

 

[Mike77]

Thanks for the response. I think I'll take a middle ground, removing about 50%, and then put on the mat, their drainage layer, and separation fabric on top of it. Almost there, then I won't lift a spade again this summer.