uPVC vs Aluminium vs Timber Windows: Full Comparison | LookInto

Window frames are available in three main materials: uPVC, aluminium and timber. Each has different costs, lifespan, and performance characteristics.

Quick Comparison

1. uPVC – Most Popular

Cost: £150-£400 per window | Lifespan: 20-30 years | Maintenance: Minimal

Advantages: Affordable, low maintenance (just annual cleaning), good thermal performance, available in many colours

Disadvantages: Shorter lifespan than alternatives, can discolour/yellow over time, less aesthetically appealing than timber

Best For: Most UK homes, budget-conscious replacements

2. Aluminium – Premium/Modern

Cost: £400-£900 per window | Lifespan: 40+ years | Maintenance: Minimal

Advantages: Slimmer frames (more glass area), very durable, excellent thermal performance (with thermal break), modern aesthetic

Disadvantages: Higher upfront cost, less traditional appearance, thermal break required for warmth

Best For: Modern properties, contemporary designs

3. Timber – Traditional/Heritage

Cost: £800-£1,200 per window | Lifespan: 20-30 years | Maintenance: High

Advantages: Classic appearance, good thermal performance, matches period properties, natural aesthetic

Disadvantages: Requires regular painting/staining every 5-7 years (£500-£1,500 per house), susceptible to rot if not maintained, higher cost

Best For: Listed buildings, conservation areas, heritage properties

Thermal Performance (U-Values)

uPVC: U-value 1.6-2.0 (good for standard)

Aluminium: U-value 2.0-2.8 (requires thermal break for efficiency)

Timber: U-value 1.8-2.4 (good thermal performer)

Security Comparison

All equal: Modern locks and hinges provide same security. Choose certified locks (police approved) regardless of frame material.

Sustainability

uPVC: Recyclable but takes 500+ years to decompose

Aluminium: Highly recyclable, infinite reuse

Timber: Renewable if from sustainably managed forests, biodegradable