Roof Ventilation Systems in Nairobi
Hot, stale air makes factories and warehouses unproductive. Avonstructures supplies and installs wind-driven rotating ventilators, ridge ventilators and louvre systems that extract heat and fumes with no running cost.
What is Roof Ventilation Systems?
Roof ventilation replaces hot internal air with cooler outside air using the stack effect and wind energy — no electricity, no moving cost.
We size the number and diameter of ventilators to the building volume and the air-change rate your process requires.
What to expect
- 01
Building volume and air-change assessment.
- 02
Ventilator type, size and quantity selection.
- 03
Roof survey and opening set-out.
- 04
Sheet cutting, kerb and flashing fabrication.
- 05
Ventilator installation and weatherproofing.
- 06
Rain test and handover.
Why this works
Zero Running Cost
Wind-driven — no power, no bills.
Cooler Interiors
Temperature drops of several degrees.
Fume Extraction
Removes smoke, steam and process fumes.
Weatherproof
Correct kerbs and flashings keep rain out.
Retrofit Friendly
Installed on existing roofs in a day or two.
Low Maintenance
Sealed bearings, long service life.
Is this for you?
Factories, warehouses, packhouses, poultry houses and workshops with heat or fume build-up.
Roof Ventilation Systems we have delivered
Real photographs from Avonstructures project sites.
Frequently asked questions
It depends on building volume and required air changes — as a guide, one 600mm turbine per 80–120 sqm of roof area.
No, when installed with a properly fabricated kerb and flashing, which is part of our scope.
Yes — the stack effect still drives extraction, though at a lower rate.
Yes, retrofitting on existing roofs is our most common ventilation job.
Commonly 300mm to 900mm throat diameters in galvanised or aluminium.
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ExploreRenovation Works
Roof repairs, asbestos removal, re-painting and re-roofing for existing buildings.
ExploreStructural Steelworks
Design, fabrication and installation of steel structures for industry, commerce and infrastructure.
ExploreReady to Build? Talk to Our Engineers Today.
Get a no-obligation quotation for your structural steel, civils or renovation project — in Nairobi or anywhere in Eastern and Central Africa.