Windhoek suburb

Roofing in Katutura

Katutura roofs are overwhelmingly sheet: IBR and corrugated, often with long unbroken runs and low pitch. That combination is efficient and cheap to maintain, provided the fixings and laps are kept honest.

What we see most is not catastrophic failure but accumulation — a decade of small movements loosening screws, plus repairs added on top of older repairs.

Roof stock here

IBR and corrugated sheet roofs on houses, extensions and outbuildings, generally low pitch with long runs and exposed fixings.

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What's happening with your roof?

What actually goes wrong in Katutura

Fixings backing out

Thermal movement works screws loose and crushes washers. Water then enters at the fixing itself, which is why leaks appear in neat lines rather than at one point.

End laps

On long runs, end laps open as sheets expand and contract. In a hard storm the rain is pushed uphill into that gap and straight onto the ceiling below.

Patch on patch

Bitumen tape and sealant over old failures trap moisture against the steel and hide where the water actually enters. Removing the layers is usually the first hour of an honest repair.

Dust in gutters

Gutters and box gutters fill through the dry months. The first serious rain then backs up over the fascia line instead of draining.

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