Reinforced Parapet Waterproofing in Madina, Accra — How We Sealed a Failing Parapet with a Fleece-Reinforced Membrane

A homeowner in Madina had a parapet wall that was actively failing. The old coating had cracked and peeled, and water was tracking straight down through the wall assembly into the rooms below. Standard coatings had been tried and failed. This job needed a professional-grade upgrade — a fleece-reinforced membrane system that bridges cracks instead of just covering them. Here is how Festghana Waterproofing Solution Company Limited executed it.

The Project at a Glance

Client	A homeowner in Madina, Accra
Location	Madina, Greater Accra
Problem	Parapet wall coating cracked and peeling — water tracking down into walls below
System used	Fleece-reinforced polyurethane waterproof membrane — the professional-grade upgrade from a simple coating
Reinforcement	Polyester geotextile fleece embedded between coating layers
Time on site	2 days (prep + reinforced application + cure)
Warranty	3-year workmanship + 25-year design life

Why Parapets Are the #1 Leak Point on Ghanaian Roofs

If you had to identify a single point on a Ghanaian flat roof most likely to leak, it would be the parapet wall. Not the roof surface. Not the water tank. The parapet.

Here is why the parapet fails first — every time — on Ghanaian homes:

• Massive thermal cycling. Vertical walls face direct sun for hours every day. Surface temperature swings from 25 °C at dawn to 60 °C+ by midday. That expansion and contraction opens cracks in any rigid coating.
• The wall-to-slab junction. Where the vertical parapet wall meets the horizontal roof slab, there is always a construction joint. Water pools at this junction whenever it rains, and gravity plus capillary action drive it right into the joint.
• Wind-driven rain. Ghana's coastal storms drive rain sideways at 30–60 km/h. Standard coatings that resist water falling on them fail against water pushed horizontally against them.
• Two-sided exposure. The parapet is exposed on both its inner and outer face. A leak in the outer face pushes water through the wall to appear inside a room below.

This Madina parapet had been coated before. The coating had cracked and peeled. Water was tracking through the wall and appearing on the ceiling of the room below. A simple recoat would fail within one rainy season for the same reasons the first coating did.

Why We Used a Fleece-Reinforced System

A simple polyurethane coating cures into a strong, flexible film — but a film alone can only stretch so far before it tears. When a hairline crack in the concrete substrate opens up by half a millimetre, a plain coating can bridge it. But when a joint opens up by a full millimetre or more, the coating tears at that exact point.

The solution used on this Madina project is a fleece-reinforced membrane system. It works like reinforced concrete but for waterproofing:

1. First coat of polyurethane is applied to the parapet.
2. Polyester geotextile fleece is embedded into the wet coating while it is still tacky — the fleece soaks up the coating and becomes part of it.
3. Second coat of polyurethane is applied on top, fully encapsulating the fleece.

The result is a composite membrane that:

• Bridges cracks up to 3 mm wide without tearing (versus about 0.3 mm for a plain coating)
• Distributes stress across the whole membrane instead of concentrating it at one crack
• Resists mechanical damage — someone stepping on the parapet cannot pierce through as easily
• Extends warranty life significantly — this is why reinforced systems get 25-year design ratings versus 10–15 for un-reinforced coatings

The fleece is invisible in the finished job. Look at the terracotta finish on the parapet in our photos — you would never know a reinforcing layer is inside the membrane. But it is the difference between a job that lasts a decade and one that lasts a generation.

Our 6-Step Process on This Project

Step 1 — Full Removal of Failed Old Coating

The old cracked coating was mechanically scraped and cleaned off the entire parapet. Any surface that was actively peeling was removed to sound substrate. This is unglamorous work but every waterproofing system fails at the interface with an unsound old coating. You cannot skip this.

Step 2 — Surface Preparation and Crack Treatment

The parapet concrete was cleaned of all dust, debris, algae, and residual old coating. Cracks wider than 0.3 mm were opened with a chase cut and filled with flexible crack filler. The wall-to-slab junction — the highest-stress point — was pre-treated with butyl rubber tape as an additional reinforcing bridge.

Step 3 — Primer Coat

An acrylic-modified polyurethane primer coat was applied across the entire parapet surface — top coping, both interior and exterior faces, and continuing down onto the roof slab itself. This ensures continuous coverage with no cold joints between wall and slab.

Step 4 — Fleece Embedment

While the primer coat was still wet, polyester geotextile reinforcing fleece was rolled into the coating and pressed down with a laminating roller. The fleece absorbs the wet coating and becomes fully saturated — it is now part of the membrane, not sitting on top of it.

Step 5 — Second Coat Encapsulation

After the primer and fleece cured to a tack-free state, a second coat of polyurethane was applied over the entire assembly. This encapsulates the fleece from above and creates the finished waterproof surface. The terracotta colour visible in our photos is this second coat.

Step 6 — Cure and Final Inspection

The complete membrane was allowed to cure for 24 hours before any foot traffic and 48 hours before the next rain. Final walk-around inspection confirmed continuous coverage with no missed spots, no pinholes, and no lifted edges.

How Reinforced Systems Compare

FACTOR	SIMPLE COATING	REINFORCED SYSTEM
Crack bridging	Up to 0.3 mm	Up to 3 mm
Design life	10–15 years	25+ years
Mechanical damage resistance	Low	High
Best for	Stable, low-stress surfaces	Parapets, joints, high-movement areas
Cost premium	Baseline	+30–40%

The economics are clear: a reinforced system costs 30–40% more upfront but lasts 2–3x as long. Over the lifetime of the property, the reinforced system is dramatically cheaper.

Book a Free Parapet Assessment

If your parapet is showing signs of failure — cracked coating, damp interior walls, ceiling stains — or if you just want to inspect before the rainy season — call us. We come out, assess the condition, and quote the appropriate system in writing within 24 hours. Free. No obligation.

• Phone: 0555 548 001 or 0241 737 026
• WhatsApp: Chat with us on WhatsApp — send a photo of your parapet
• Book online: Book a waterproofing service
• Buy DIY materials: Shop waterproofing products

Festghana Waterproofing Solution Company Limited (trading as Fest Ghana Limited) is a Ghanaian-owned waterproofing specialist. We install and supply professional waterproofing solutions — including reinforced membrane systems — for parapets, roofs, gutters, foundations, fish ponds, water tanks, and commercial infrastructure across Accra, Tema, Kasoa, Madina, Kumasi, and nationwide Ghana — with a workmanship warranty on every job.