Aluminium Windows in Kenya:Types, Prices, and How to Choose the Right One
What to know before you fit, replace, or upgrade your windows — from frame types and glazing options to what actually drives the cost.
TSL Construction Aluminium & Glass Fabrication, Nairobi
Walk through most new developments in Nairobi — from apartment blocks in Kilimani to office fit-outs along Waiyaki Way — and you’ll notice the same material doing a lot of the visual and structural work: aluminium, paired with glass. It’s become the default choice for windows, doors, partitions, and facades in Kenyan construction, and for good reason. This guide walks through the window types available, what actually determines price, how aluminium stacks up against wood and steel, and how to choose the right specification for your home or project.
Why aluminium has become the standard
Kenya’s climate and building conditions favour aluminium for a few practical reasons. It doesn’t rot, warp, or get eaten by termites the way timber frames can. It doesn’t rust the way untreated steel does, particularly in coastal or high-humidity areas. It’s light enough to handle large sliding and folding configurations without sagging, and powder-coated finishes hold their colour for years with minimal upkeep.
There’s also a security and design angle. Slim aluminium profiles let in more natural light per square metre of wall than bulkier wood or steel frames, which matters in a market where daylighting keeps electricity costs down. And because aluminium can be paired with tempered, laminated, or tinted glass, it’s straightforward to specify windows that also address noise, heat gain, or break-in resistance.
Types of aluminium windows available in Kenya
Sliding windows
Panels slide horizontally on a track. Popular for bedrooms and living areas — no swing space needed, easy to size for wide openings.
Casement windows
Hinged at the side and opened with a crank or handle. Seal tightly when closed, which makes them a strong choice for ventilation control and security.
Fixed windows
Non-opening glass set into an aluminium frame. Used for light-focused openings, feature walls, or paired above/beside opening windows.
Louvre windows
Angled glass or aluminium slats that open together. Common in bathrooms, kitchens, and stairwells where constant airflow matters more than a view.
Bi-fold & sliding-folding doors
Multiple panels concertina open to fully connect indoor and outdoor space — a common request for patios, balconies, and restaurant frontages.
Tilt-and-turn windows
Open inward on a tilt for ventilation, or fully inward on a turn for cleaning and escape access. More common in higher-end residential and office builds.
What actually drives the price
Aluminium window pricing in Kenya is typically quoted per square metre, and the range is wide because so many variables stack on top of each other. As a rough starting point, standard single-glazed casement or sliding windows tend to sit in the lower-to-mid thousands of shillings per square metre, with double glazing, larger sliding or bi-fold configurations, and upgraded glass or hardware pushing the price up from there. Installation is usually quoted separately from fabrication.
The specifics that move a quote up or down:
- Glazing: single glazed is the baseline; double glazing adds cost but improves insulation and noise reduction.
- Glass type: clear glass is cheapest; tinted, laminated, and low-E (low-emissivity) glass all add a per-square-metre premium.
- Profile and finish: powder-coated and anodised finishes cost more than mill-finish aluminium but resist weathering better.
- Hardware: multi-point locking, child-safety locks, and premium handles are typically priced per window or per set, on top of the frame cost.
- Size and configuration: bay windows, large sliding panels, and bi-fold systems require more material and more complex fabrication than a standard single window.
- Installation complexity: ground-floor standard openings cost less to install than upper-floor, oversized, or structural openings.
Because so many of these factors are project-specific, published price lists are only ever a starting reference. The reliable way to budget is a site visit and a written quote based on your actual openings, glass choice, and finish.
Aluminium vs. wood vs. steel
| A general comparison — actual performance depends on the specific product and installation quality. | |||
| Factor | Aluminium | Wood | Steel |
| Maintenance | Low | High — needs sealing/repainting | Medium — needs rust treatment |
| Weight | Light | Medium | Heavy |
| Slim sightlines | Strong | Weaker | Strong |
| Corrosion resistance | High | N/A (rot risk instead) | Lower unless treated |
| Upfront cost | Medium | Medium–high | Medium–high |
| Best fit | Most residential & commercial | Traditional/heritage aesthetic | Industrial, high-security |
Aluminium sits in the sweet spot most Kenyan projects need: low upkeep, slim frames, and a finish that holds up to sun and rain without constant attention.
How to choose the right specification
Match the window to the room
Casement windows make sense where you want tight seals and controlled ventilation — bedrooms, offices. Sliding windows suit wide openings where swing space is limited. Louvres belong in bathrooms and stairwells where airflow matters more than an unbroken view.
Think about orientation and heat
Openings that face direct afternoon sun benefit from tinted or low-E glass to cut glare and heat gain, especially on upper floors and in unshaded facades.
Decide on security requirements
Ground-floor and street-facing openings are worth specifying with multi-point locking or laminated glass, particularly for standalone homes and ground-floor commercial units.
Set a realistic budget band
Decide early whether double glazing and upgraded hardware are must-haves or nice-to-haves — it’s the single biggest lever on the final quote, and it’s easier to plan for upfront than to add after fabrication has started.
Check the finish warranty
Powder-coated finishes vary in quality. Ask what warranty covers fading, chalking, or peeling, and over what period.
Why the contractor matters as much as the material
Aluminium performs well, but only if it’s fabricated to size and installed with proper sealing, drainage, and alignment. Poorly installed windows — even good-quality aluminium ones — can leak, stick, or let in dust and noise regardless of the frame’s specifications.
TSL Construction Limited fabricates and installs aluminium and glass systems — windows, doors, partitions, and glazing — for residential and commercial projects in Nairobi. Because fabrication and installation are handled by the same team, sizing, hardware, and fit are treated as one job rather than handed off between separate suppliers.
Frequently asked questions
How much do aluminium windows cost in Kenya?
Pricing is generally quoted per square metre and depends on the window type, glazing (single vs. double), glass upgrade, hardware, and installation complexity. Because these variables shift the total significantly, the most accurate number comes from a site visit and a written quote rather than a general price list.
How long does aluminium window installation take?
A standard residential installation of a handful of windows is usually completed within a few days once fabrication is done. Fabrication lead time (measuring, manufacturing to size) typically takes longer than the installation itself, so factor that into your project timeline.
Do aluminium windows rust?
Aluminium doesn’t rust the way steel does, because it forms a natural oxide layer that resists corrosion. A quality powder-coated or anodised finish adds further protection against weathering, salt air, and UV exposure.
Are aluminium windows energy efficient?
Standard single-glazed aluminium conducts heat more than wood, but pairing it with double glazing, thermal breaks, or low-E glass substantially closes that gap and adds noise reduction as a bonus.
Can aluminium windows be repaired instead of replaced?
Often, yes. Sticking tracks, worn seals, damaged hardware, or cracked glass panels can usually be repaired or replaced individually without redoing the whole frame, which is generally cheaper than full replacement.
Get a quote for your windows
Send TSL Construction Limited your window sizes, glazing preference, and location, and get a written quote based on your actual project — not a generic price list.