How best to repair bitumen/asphalt floor?

[A3Y55]

Hi, for my living room floor theres about a 4-6 inch concrete base and on top of that theres about 20mm with some kind of screed, bitumen or asphalt hard surface not sure which to look at it is a hard black surface.

Anyway the problem is around the perimeter of the room the there are cracks in the black surface and some parts have broken away these range inwards from the wall from 20mm-120mm. i've also discovered in places that theres a small gap of about 5 mm between concrete base and the wall and a few small bits of concrete broken off.

I'm just wondering the bast way to go about repairing this so it water proof and whats materials to use.

Heres what I was thinking of doing:

- For the concrete base - Fill with mortar the 5 mm gap between the base and the wall, also fill in the small areas that have broken off.

- Prime the areas that need repair with with Bitumen primer making sure that I come up above the existing Damp Proof Coarse in the wall http://www.toolstation.com/shop/Str...ls/Bituminous+Primer+1+Ltr/d210/sd2809/p15467

- coat the primed area with Cromaprufe http://www.toolstation.com/shop/Str...aterseals/Cromaprufe+5+Ltr/d210/sd2809/p10290

- Then once all that has set, level the areas with a floor leveling compound http://www.wickes.co.uk/Deep-Base-Levelling-Compound/invt/154050


Will this be adequate for repairing the floor and making sure the areas as damp proofed?

Is the a better way of doing this... I know the best way to make sue its 100% damp proof would be to dig up all the floor put in a DPM and pour with concrete. But I think this might be over kill for the small areas around the room. I'm wanting more of a repair solution if thats possible.

heres a diagram

although the flooring in this photo still has some plaster on it is should give you an Idea of what I'm talking about.

Thanks

 

[masona]

Will be difficult to use bitumen paint specially under the plaster, I think your best bet is to use hot bitumen pour which will fill in all the nooks and crannies. Pouring hot bitumen is dangerous and need a lot of care, do a small bit at a time, you also have to keep an eye when heating bitumen as it will expand and rises very quickly so do a small lump at a time until you're confident. A bitumen gloves and face shield is a must for safely, might be best to heat the bitumen in the room near the repairing the area

 

[A3Y55]

Hot bitumen poured sounds like it would be ideal to get in all the nooks and crannies. Where can you buy Hot bitumen? Is there any specialist equipment involved in heating the Bitumen? Is it an expert area where I would need to get somebody out to do?

If so Ive a feeling the costs might rocket.

Ive had a quick look on the net and all for uses for hot bitumen are for roofs and for laying out door surfaces.. drives, roads etc. So I'm guessing is a specialized area which I would need to get somebody out. Kinda defeats the object as I don't have the money to pay somebody and looking for a solution I can do myself.

 

[masona]

Dunno what I've done here I've posted on the wrong topic

//www.diynot.com/forums/viewtopic.php?p=1712945#1712945

You can buy cold bitumen pour or your local roof asphalts will do it for you for hot pour, get a quote wouldn't take long to do. It's possible to do it yourself but don't want say how because the safely side of it.

 

[ivanamilano]

Hello,

I was wondering how you repaired the bitumen layer. I have an identical floor and would like to lay new solid oak floor on top, without having to remove the existing bitumen layer.
What type of adhesive should be used for fixing oak boards to the bitumen?
What are the possible problems?

Thank you very much.

Ivana

 

[jchiusefux]

Hi,

I was hoping you might be able to update as to how this went? We have a similar issue with what looks like a similar floor material that has crumbled away and left large gaps under the skirting board.

Has this worked for you using a bitumen pour?

 

[dazlight]

Remove all the loose bits ,
fill in with ardex A46 or similar repair mortar which is a exterior version.
Then go over it overlapping onto the asphalt with ardex DPM1c

 

[jchiusefux]

Thanks - will that cover as a DPC also? That section of wall is underground and has previously had damp. I want to rip out the rotting skirting board which I expect will reveal (hopefully)the stone wall behind.