Watch: Concrete Gutter & Floor Waterproofing at Amasaman — 130 m², Start to Finish
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3 minutes 27 seconds. A complete two-coat polyurethane waterproofing application on a concrete gutter and floor slab at Amasaman, Greater Accra — 130 square metres, filmed across both working days by Fest Ghana Limited.
What is in the video
- 0:09 — Day one: surface preparation and first coat. Cutting back loose material, then the first coat on the gutter walls and channel.
- 1:20 — Mixing and application. The coating is single-component. No chemicals are mixed on site; it is stirred to an even consistency and applied.
- 1:52 — Day two: second coat. The first coat has cured hard enough to walk on. The second coat goes on perpendicular to the first.
- 2:47 — The finished membrane. Seamless from the floor, up the gutter wall and over the top.
- 3:13 — Specification and warranty.
The job
A new-build concrete gutter and floor slab. Gutters are the hardest part of any roof to waterproof, because a gutter is designed to hold water. Standing water is what separates a coating that lasts from one that fails in the first heavy season.
Acrylic and water-based paints cure physically — the water evaporates and the film forms. Put standing water back on that film for long enough and it softens again. Polyurethane cures chemically. Once it has reacted it cannot be undone by water, which is why we use it in gutters, tanks and pools rather than a cheaper emulsion.
Specification
| Area | 130 m² — concrete gutter, gutter walls and floor slab |
| Product | Fest Ghana single-component polyurethane waterproof coating |
| Coverage | 1 kg/m² across two coats — 13 × 10kg buckets |
| Coats | Two, second applied perpendicular to the first |
| Programme | Four days including cure time between coats |
| Location | Amasaman, Greater Accra |
| Warranty | 3-year workmanship, 3-year material |
| Design life | 20 years |
Why two coats, and why 1 kg per square metre
One coat is not waterproofing. It pinholes. The second coat covers what the first missed and builds the film thickness the system needs to work.
The 1 kg/m² figure is what our own jobs actually consume across two coats, not a laboratory number. Manufacturer coverage figures assume smooth, sealed, non-absorbent concrete. Real slabs in Ghana are rough and porous. Spreading it thinner saves a little money today and buys a leak in two years.
Want this done, or want to do it yourself?
We supply the coating nationwide and carry out installation across Greater Accra and beyond.
Not sure how much you need? WhatsApp your measurements to 0555 548 001 and we will work out the quantity before you order. Free.
Related reading: Why the coverage figure on your tin is wrong · Water-based vs acrylic vs polyurethane · Why your waterproof coating peeled off