How to use SUMO Terraceguard (terrace membrane)
SUMO Terraceguard is a heavy-duty, elastic liquid-applied membrane for terraces. Here is how to apply it for a seamless, UV-stable waterproof layer.
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SUMO Terraceguard is a heavy-duty terrace waterproof coating — a highly elastic, liquid-applied membrane ideal for exposed terraces and roof slabs. Its elasticity bridges hairline movement and it resists UV and weather.
This guide covers applying Terraceguard as a seamless two-coat membrane. Coverage is around 20 sq.ft per litre per single coat (it varies with the substrate).
What you’ll need
Step by step
Clean and prepare the slab
Remove dust, moss, loose screed and flaking coatings so the slab is sound and clean. Check the falls run to the drains.
Treat cracks and reinforce corners
Cut out and fill cracks, then bed reinforcing tape/fabric into a first pass of Terraceguard along parapet corners, drains and around pipes.
Apply the first coat
Brush/roller a full first coat across the whole slab and up the parapet to the required height, working it in with no dry misses.
Apply the second coat crosswise
After the first coat has cured enough to over-coat, apply the second at right angles for full, pinhole-free, even-thickness cover.
Cure and check
Let the membrane cure, then hose- or rain-check for ponding and coverage. Address any standing water to extend its life.
Care, tips & what to avoid
- !Coating over live cracksUntreated cracks reappear through the film. Cut out, fill and reinforce them.
- !Missing the parapet cornersThe slab-to-parapet junction is the classic leak point — reinforce it.
- !One thin coatThin film pinholes and breaks down early. Apply two crossed coats to spec.
