Key takeaways
- Aluminum is the default for large openings and coastal salt exposure; specify a thermal break and the right finish
- uPVC wins on thermal insulation and price for standard residential sizes, but needs UV-stabilised profiles and steel reinforcement
- Powder-coat or anodise aluminum for corrosion; avoid bare mill finish outdoors
- Salt-spray-rated hardware and sealed drainage decide how long the system lasts
- Match glazing to climate: laminated or insulated units near the sea
- Everything should be ordered as one opening schedule, not bit by bit
1. What a coastal site does to windows and doors
Coastal environments are hostile to joinery in three ways. Salt-laden air corrodes metal fittings, UV bleaches and embrittles plastics, and wind-driven rain pushes water into every joint and track. A system that is fine 50 km inland can fail within a few years within sight of the sea. The choice between aluminum and uPVC matters, but the grade and finish matter more.
2. Aluminum: strengths, weaknesses and the grade that lasts
Aluminum is stiff, stable and takes large glazed areas with slim sightlines — the reason most hotel and villa facades use it.
- Strength: carries the weight of double-glazed, laminated and oversized panels without sagging.
- Longevity: does not absorb moisture, warp, or feed mould.
- Thermal break: a polyamide bar between inner and outer profiles stops heat transfer; without it, condensation forms in hot-humid climates and cooling loads climb.
- Hardware: the profile is only as good as its hinges, rollers and locks — specify marine-grade or high-quality stainless.
Specify, in writing: alloy and temper (commonly 6063-T5), wall thickness, finish (qualicoat/qualanod powder coat or anodising — not bare mill finish outdoors) and whether it is thermally broken.
3. uPVC: where it wins and where it struggles
uPVC (unplasticised PVC) is the volume choice for standard residential door and window sizes. It is a good thermal insulator, cheap to buy, needs no painting, and modern profiles in light colours perform well.
- Strength: needs internal steel reinforcement to stay rigid; unreinforced or under-reinforced profiles bow in heat.
- UV: must be UV-stabilised. Dark colours absorb more heat and are more prone to distortion; light colours are safer in strong sun.
- Size limit: best for standard openings; very wide or tall openings usually go to aluminum.
uPVC is an excellent choice for a mid-sized apartment or villa away from direct salt, where budget and thermal performance outrank sightlines.
4. Aluminum vs uPVC at a glance
| Factor | Aluminum | uPVC |
|---|---|---|
| Coastal salt resistance | Excellent with correct finish | Good; hardware still must be rated |
| Strength for large openings | Excellent | Limited |
| Thermal insulation | Good only if thermally broken | Excellent |
| Maintenance | Low, occasional clean & re-seal | Very low |
| Colour range | Wide (powder coat) | Narrower; dark colours risk distortion |
| Up-front cost | Higher | Lower |
| Best for | Facades, big glass, hotels | Standard residential openings |
5. Glazing and hardware for coastal projects
The frame is half the system. For coastal and hot-humid sites:
- Laminated glass where security, storm or noise matters; it also holds together on impact.
- Insulated (double-glazed) units to cut solar heat gain and condensation, with appropriate coatings.
- Correct glazing beads and sealed drainage paths so driven rain drains out instead of sitting in the track.
- Marine-grade seals and hardware; twin-point or multi-point locking on exterior doors.
6. Choosing by project type
- Beachfront villa or resort: thermally broken aluminum, laminated/insulated glazing, rated hardware.
- Hotel facade: aluminum curtain wall or large sliding systems, standardised per room type.
- Apartment block: uPVC or aluminum sliding windows, batch-matched per unit.
- High-rise: aluminum, engineered and tested for wind load.
7. Ordering one opening schedule from VIGOHOME
The most common project failure is ordering windows piecemeal. Send an opening schedule — width × height × quantity per unit, with glazing and colour — and VIGOHOME quotes the complete set of aluminum or uPVC doors and windows as one package, so frames, glass, hardware and colours match and arrive together. Explore the full range on the Doors & Windows page; for the rest of the envelope see sourcing materials for a villa project.
Frequently asked questions
Is aluminum or uPVC better in a coastal climate?
Aluminum, provided it is thermally broken and correctly powder-coated or anodised. uPVC is a good, cheaper option for standard residential openings away from direct salt spray, but large glazed areas and full facade exposure suit aluminum better.
Why do my windows condensate inside?
Condensation usually means a cold surface meeting warm humid air. In hot-humid climates a non-thermally-broken aluminum frame is the usual culprit; a thermal break plus insulated glazing removes most of it.
What glazing should I use near the sea?
Laminated glass for safety, storm and noise, and insulated (double-glazed) units to reduce solar heat gain and condensation. Both should sit in frames with sealed drainage.
Can VIGOHOME make windows to my opening schedule?
Yes. Send your opening schedule (width x height x quantity per unit) with glazing and colour requirements and VIGOHOME returns a complete aluminium or uPVC door and window package, matched to the rest of the material order.
Next: choose the entrance with entrance and security doors for villas.