Positive Side Waterproofing
Waterproofing applied to the face water arrives from — the external side of a basement wall or the top of a slab.
On an actual building
Water pressure presses it against the structure, and it keeps water out of the concrete itself rather than merely off the internal finish. It is always technically preferable where it can be installed, which in practice means during construction.
What we most often have to correct
That it can be retrofitted easily. On an existing basement it means excavating to the full depth of the wall.
Terms that come up alongside this one
- Negative Side Waterproofing
Waterproofing applied to the dry face of a structure — the inside of a basement wall — rather than the face the water arrives from..
- Box Type Waterproofing
A continuous barrier wrapping an entire below-grade structure — beneath the raft, up every retaining wall and sealed above ground level — so the structure effectively sits inside a sealed box..
- Hydrostatic Pressure
The pressure exerted by standing water against a structure, increasing with depth below the water level..
More below grade terms
Positive Side Waterproofing — questions we get asked
What does positive side waterproofing mean in waterproofing?
Waterproofing applied to the face water arrives from — the external side of a basement wall or the top of a slab.
Why does positive side waterproofing matter on a real project?
Water pressure presses it against the structure, and it keeps water out of the concrete itself rather than merely off the internal finish. It is always technically preferable where it can be installed, which in practice means during construction.
What do people commonly get wrong about positive side waterproofing?
That it can be retrofitted easily. On an existing basement it means excavating to the full depth of the wall.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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