BEST METHOD TO WATERPROOF BASEMENT & RETAINING WALLS. * Best Product - Liquid Applied Membranes.*

BEST PRACTICE used by FINDLAY-EVANS TEAM o waterproof basement & retaining walls. Waterproofing Product - Liquid Applied Membranes. Paul Evans - Manager/Director FINDLAY-EVANS WATERPROOFING & President of Australian Institute of Waterproofing - - Liquid Rubber. PH 03 8812 2918
The video focuses on the importance of properly treating and protecting the footings of basements and retaining walls, specifically the "live" joint where leaks often occur. The FEW methodology involves meticulous attention to this joint, applying multiple coats of membrane and a special protection sheet to prevent damage during backfilling.
Critical Area: The joint between the slab or footing and the wall, known as the "live" joint, is where leaks are most likely to occur.
FEW Methodology:
Hands-On Approach: Applicators get down on hands and knees to thoroughly brush material into the joint.
Multiple Coats: Two or three coats are applied to ensure the joint will not leak.
Reinforcement Barrier: If the junction is clean, a polyethylene fabric is used as a reinforcement barrier embedded in the liquid rubber.
Overall Membrane: Applied over the top, resulting in five or six coats on the joint.
Protection Sheet:
Sticky Back Material: A peel-and-stick material that adheres to the membrane, preventing shifting during backfilling.
Importance: Protects against damage from vines, stones, etc., that can puncture the membrane.
Common Mistakes:
Improper Protection: Builders may use inadequate protection sheets, leading to leaks.
Backfilling with Wrong Materials: Using scoria or crushed rock can cause damage to the membrane.
Overall Emphasis: The protection of the membrane is critical but often overlooked, requiring careful attention to detail and proper materials to prevent leaks.
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How Findlay-Evans Waterproof Basement Footings
The footings of the basement and retaining walls are critical. It's usually the "live" joint as we term it.
That's the joint between the slab or the footing and then the wall is in place on top of that.
This is usually where a leak will occur if it's going to leak.
FINDLAY-EVANS - RETAINING WALL WATERPROOFING PREPARATION
*Particular attention to preparation & detailing prior to the membrane application is paid by all the Findlay-Evans Team.
Findlay-Evans methodology for Below Ground Tanking is to get down on that by hands and knees basically and get right into that joint with brush & WATERPROOFING MATERIAL.
Liquid Applied Membrane is then applied thoroughly in to the “cove” joint to make sure that that joint will not leak. Even if you don't put another membrane on it that joint will not leak. This is important.
What we do is we get right down, get it coated, get two or three coats on there, and prepare it up.
If it's a nice clean junction, we'll actually use a polyethylene fabric on that as a reinforcement barrier as well that's embedded into the liquid rubber.
Then once that's done, the final waterproof membrane is applied over the top.
Effectively on that joint, you patch over about five or six coats of membranes. You can understand it's a very substantial part of the job and a very robust waterproof coating goes on.
PROTECTING BELOW GROUND WATERPROOFING MEMBRANE
After that's done, the coatings are on and they're all cured, we then use a protection sheet to protect that beautiful work that's all just being done.
The protection sheet that we use is a sticky back material, which means it's a peel and stick.
You rip the backing of it, stick it on the membrane so that it doesn't shift and move about when the excavators are coming back in to backfill those areas.
This is critical because otherwise, vines, stones, and things can get down the back of conventional type protection sheets that will cause an amazing amount of damage to the membrane. This will puncture the membrane and start to leak.
Quite often, I'm being faced with builders who think they know what they're doing. They'll put the protection sheet in, backfill with scoria or crushed rock, and so on. Then after it sets out, it's leaking. Why?
Once it's dug out, we understand why because you pull the protection sheet out. It's full of stones and everything behind, lots of little holes in that membrane that's all going on there. It's not just our membrane, this is other membranes as well. It's critical to protect the membrane, very often overlooked.
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