How do you remove old waterproofing?

If the waterproof membrane was applied using an adhesive, a blowtorch may be required to melt the adhesive enough for it to be removed. After this is done, a good scraping or blast from a compressor will remove any leftover residue.

How do you remove part of a concrete slab?

Steps for Removing a Concrete Slab

1. Step 1: Create a Void Under the Concrete. The best way to speed up concrete removal is to create a void underneath the section of slab you’re working on.
2. Step 2: It’s Hammer Time.
3. Step 3: Pull Apart and Remove the Broken Concrete.
4. Step 4: Repeat Steps Until Concrete Is Demolished.

How do you replace a concrete pad?

How to Remove and Replace a Small Concrete Entry Pad

1. Step 1: Start with a sledgehammer. Start with a sledgehammer.
2. Step 2: Build the form.
3. Step 3: Pin the pad to the foundation.
4. Step 4: Level the wet concrete.
5. Step 5: Float the concrete.
6. Step 6: Round over the edges.
7. Step 7: Add texture with a broom.
8. Step 8: Cover the pad.

Can you waterproof over existing waterproof?

Patching waterproof membranes With an air-tight seal, no breaches in its structure can occur and work to your disadvantage. At times, with extensive or compromising damages, the membrane can be weakened, leading to a need for repair and patching of the existing one.

How do I get rid of bituthene?

put some charcoal lighter fluid on a rag and start wiping. lighter fluid should dissolve the tar. btw its spelled bituthene. like bituminous means something that contains bitumen.

Can water come up through a concrete slab?

However, concrete is porous. No, water isn’t going to soak up like a sponge, but concrete does allow water to seep through when there is enough. Concrete also cracks, and those cracks will be the first routes of seeping water as it leaks through the slab.

How do you remove a thick concrete slab?

Start to break the concrete, starting six inches from the edge and working your way in. For slabs less than four inches thick, use a sledgehammer. For more than four inches thick, use a demolition hammer.

How do you remove waterproofing from concrete?

There are two methods for removing sealers from concrete:

1. Mechanical, which consists of grinding, blasting or sanding the coating off the surface.
2. Chemical, using a chemical stripper to remove the the coating.