Rainy Season Waterproofing Checklist for Ghanaian Homes and Businesses (2026)

Ghana's major rainy season runs from April through July, with a second shorter season in September and October. In between, most people forget about the roof. Then the rain arrives, water finds a weak spot, and the emergency-repair phone starts ringing at 6 AM the day after the first big storm.

The whole cycle is preventable. This is the checklist we give clients — the ten checks you can do yourself over a weekend, plus the six that need a professional. Working through it once a year, ideally in March or August, will catch 90% of the problems that turn into emergencies.

Part 1: The Ten Checks You Can Do Yourself

1. Walk the roof perimeter

Get up on your roof. Walk around the entire edge. Look for cracks in the parapet coating, lifted edges of the roof coating, and any daylight visible through a joint from below (if you can see up from the roof soffit inside the house). Take photos of anything that looks off — they help when you get quotes later.

2. Clean the gutters and downpipes

The single most common cause of ceiling leaks in Ghana is not roof failure — it is blocked gutters and downpipes causing water to back up and overflow into the building. Clear all leaves, twigs, dust, and any bird nests. Run a hose down each downpipe to confirm it drains.

3. Check for standing water on the roof

The morning after a rain, look at your roof. If there are pools of water still sitting there more than a few hours after the rain stopped, you have a drainage problem. Either the roof falls have failed or a drain outlet is partially blocked.

4. Inspect the wall-to-slab joint

Where the parapet wall meets the roof slab is the highest-stress point in the entire system. Look for cracks in the coating along this junction, any lifting of the coating away from the substrate, and any visible gap.

5. Check every roof penetration

Vent stacks, plumbing pipes, satellite dish mounts, air-con condenser pads, and drain outlets — every penetration is a potential leak point. Look at the coating around each one for cracks, lifting, or old failed sealant.

6. Look at the ceiling from inside

Walk every room. Look at the ceiling carefully, especially in the corners against exterior walls. Any discolouration — even a faint yellow or brown tinge — means water has been reaching that spot at some point.

7. Smell test each room

After a rainy night, close all the windows in each room for a few hours, then open the door and smell. A musty or damp smell that isn't there in the rest of the house indicates water has entered the wall or ceiling cavity of that specific room.

8. Check the underside of concrete gutters and overhangs

White chalky deposits (efflorescence) on the underside of concrete are a sign that water has been travelling through the concrete for weeks or months. Rust streaks indicate the reinforcement steel has started to corrode. Both require urgent attention.

9. Inspect the base of exterior walls

Rising damp shows up as a dark line running horizontally along the base of exterior walls, roughly 30–100 cm above ground level. Efflorescence, paint blistering, and mould growth in this zone all indicate below-grade water pressure or a failed damp-proof course.

10. Test the seal around windows and doors

Run water from a hose (gently) along the top of each exterior window and door frame while someone watches from inside. Any water tracking through the frame means the seal has failed and needs re-caulking.

Part 2: The Six Items That Need a Professional

Some parts of the annual check are DIY-friendly. Others carry enough risk (physical, structural, or financial) that they should be done by someone with a warranty on their work.

1. Any parapet showing cracks or coating failure

The parapet is the number-one leak point on Ghanaian roofs and a botched repair on it makes the problem worse, not better. A reinforced membrane system with polyester fleece is the standard fix and it requires proper training to install.

2. Rust streaks on any concrete surface

Rust streaks mean reinforcement steel is corroding. This requires assessment by someone who can determine how much of the steel needs treatment vs. replacement, and how much of the surrounding concrete needs to come out and be rebuilt. This is not a DIY project.

3. Recoating an entire roof

Rolling coating on a small patch is DIY-friendly. Recoating an entire roof requires proper substrate preparation, correct film thickness measured at multiple points, cure time management, and a formal test at handover. Get a professional.

4. Anything above one storey

Falls from height are the leading cause of construction site fatalities in Ghana. Do not climb onto a two- or three-storey roof to inspect it yourself. A professional inspection costs less than one visit to the hospital.

5. Basement or below-grade wall waterproofing

Below-grade waterproofing works against water pressure, not just water flow. It requires specialised cementitious or crystalline systems that must be applied to specific film thicknesses under specific moisture conditions. This is a specialist job every time.

6. Any water contact surface — tanks, ponds, pools

Waterproofing systems for water contact must be food-grade or aquaculture-grade certified. The wrong system leaches into the water. Never DIY a fish pond or potable water tank waterproofing job.

Month-by-Month: When to Do What

MONTH	SEASON	RECOMMENDED ACTION
January – March	Dry / Harmattan	Best time for major waterproofing works. Dry substrate, low humidity, faster cure. Book your job now.
April – July	Major rainy season	Emergency repairs only. Most waterproofing systems cannot be applied in wet or high-humidity conditions.
August	Short dry break	Do the DIY 10-check list. Schedule any pro work for September.
September – October	Minor rainy season	Emergency repairs only. Complete any critical work started in August.
November – December	Dry	Second-best window for major works. Good weather, cure conditions ideal.

The Bottom Line

An annual DIY roof walk takes 30 minutes and costs nothing. Catching one small problem before it becomes a big one has, in our experience, saved clients between GHS 15,000 and GHS 200,000 depending on the building.

If you get through the checklist and everything looks good, congratulations — you have a healthy roof. Do it again next year.

If you find one or more items that concern you, that’s exactly when to call. Prices to fix small problems are a fraction of prices to fix big ones.

Book a Rainy Season Assessment

• Phone: 0555 548 001 or 0241 737 026
• WhatsApp: WhatsApp us photos of the problem areas
• Book online: Book a waterproofing service
• Read next: 7 Signs Your Roof or Parapet Needs Waterproofing · Waterproofing Cost in Ghana 2026

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