For most Tanzanian homes, powder-coated aluminium windows with sliding or casement openings are the best all-round choice: they do not rust, need little maintenance and come in many sizes. Steel windows are cheaper and very secure but rust, especially near the coast. Hardwood timber looks beautiful and works well for doors but needs regular care. uPVC seals tightly and suits air-conditioned rooms but costs more. For doors, a solid hardwood or steel security door at the main entrance, with flush or panel doors inside, covers most needs.
How do the main window materials compare?
| Material | Cost | Rust or rot | Security | Maintenance | Best for |
|---|---|---|---|---|---|
| Powder-coated aluminium | Medium | Does not rust | Good with grills | Low | Most homes and offices |
| Steel (mild steel) | Lower | Rusts if not painted | Very good | Repaint every few years | Budget builds, inland |
| Hardwood timber | Medium to high | Rots if neglected, termites | Good | Oil or varnish yearly | Traditional or high-end homes |
| uPVC | High | Does not rust or rot | Good with good locks | Low | Air-conditioned rooms, coast |
Prices change often, so get quotes per unit size. As a rough example in 2026, a standard 1.2 m by 1.2 m sliding aluminium window with clear glass might cost around TSh 350,000 to 700,000 supplied and fitted, depending on the profile and glass. Treat this as an example only.
Are aluminium windows good in Tanzania?
Yes, for most homes. Aluminium does not rust, the powder coating keeps its colour for years, and local fabricators can make almost any size. The weak points are thin, cheap profiles that bend and rattle, sliding tracks that fill with dust and rain, and poor seals. Ask to see the profile thickness, check the rollers are smooth, and make sure the bottom track has drainage holes so rain can escape. Near the sea, aluminium is a much better choice than steel; see building near the coast.
Should I choose sliding or casement windows?
Sliding windows are cheaper and do not swing into the room or onto a veranda, but only half the window can open. Casement windows (hinged like a door) open fully, catch more breeze and seal better, which matters in hot towns. Louvre windows (glass slats) give the most airflow and are still common in older houses, but they are harder to secure and to seal against wind-driven rain.
For comfort, plan windows on opposite walls so air can flow through the room. Our guide to keeping a house cool has more on window placement and shading.
What about burglar bars and security?
Most Tanzanian homes add steel grills (burglar bars) to ground-floor windows. A few points make them both safer and easier to live with:
- Fix them into the structure, with bolts or bars set into the wall or column, not just screwed into plaster.
- Plan a fire exit. At least one window in every bedroom, or a door, should have a grill that opens from inside with a key kept nearby.
- Choose a simple pattern. Plain vertical bars are easy to clean and paint.
- Galvanise before painting, especially on the coast.
Which doors should I use?
- Main entrance: a solid hardwood door (such as mninga or mvule where legally sourced) or a steel security door, with a good mortice lock and a door viewer.
- Back and kitchen doors: steel or solid timber, often with a steel grill gate outside.
- Internal doors: flush doors or panel doors on hardwood frames are fine. Hollow-core doors are cheap but dent and swell in bathrooms.
- Bathrooms: use water-resistant doors or seal all edges, and keep a gap at the bottom for ventilation.
- Sliding glass doors: popular for living rooms opening to a veranda. Use toughened glass and a strong lock.
How long do windows and doors last?
Well-made aluminium windows usually last 20 to 30 years, with new rollers and seals now and then. Steel windows can last as long if they are painted every few years; left alone, they rust at the bottom rail first. Hardwood doors last for decades when the bottom edge is sealed and the finish is renewed, while cheap hollow-core doors often need replacing within ten years, sooner in bathrooms. Budget for spare rollers, hinges and locks as part of your home maintenance.
What glass should I use?
Clear 4 to 5 mm float glass is standard for small windows. Use toughened (tempered) or laminated glass for large panes, sliding doors, glass near floor level and anything in a bathroom. Tinted or reflective glass cuts heat on west-facing windows, but it also makes rooms darker. Frosted glass suits bathrooms and street-facing rooms.
Frequently asked questions
Which is cheaper, steel or aluminium windows?
Steel windows usually cost less to buy, but they need painting and rust repair. Over 15 to 20 years, aluminium often works out cheaper.
How do I stop sliding windows from leaking?
Ask for drainage slots in the bottom track, a good sill with a drip edge outside, and a sealant joint between frame and wall.
Are uPVC windows worth it in Tanzania?
They seal well and suit air-conditioned rooms and coastal sites, but they cost more and fewer local fabricators make them. Get spare parts details before you buy.
When should windows be installed during construction?
Frames go in after the walls are up and before final plastering, so the plaster can be finished neatly around them. Glass usually goes in near the end.
Choosing finishes for your build
Vika Construction helps clients choose windows, doors and finishes that suit their budget and their site. Contact us to plan your project.
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