In this guide
Frame material affects sightlines, finish, maintenance and structural design, but material name alone does not establish thermal performance or durability. Compare complete systems with like-for-like glazing, reinforcement, coatings and guarantees.
| Material | Often chosen for | Check in the specification |
|---|---|---|
| uPVC | Lower-maintenance mainstream systems | Reinforcement, profile depth, colour stability |
| Aluminium | Slimmer sightlines and larger openings | Thermal break, coating and coastal exposure |
| Timber | Natural finish and repairability | Species, treatment, detailing and maintenance cycle |
Ask for colour samples in daylight and details for junctions, drainage paths and replacement parts. Maintenance claims should state the expected task and conditions rather than “maintenance-free”.
FAQs
Do slim frames automatically mean better thermal performance?
No. Sightline and heat flow are different characteristics. Compare declared performance for the complete frame-and-glass configuration.
How does ongoing maintenance differ between materials?
Timber finishes usually need planned inspection and renewal; coated aluminium and uPVC need cleaning and hardware/drainage care. Exposure and product instructions matter.
Suggested component
A weighted material comparer for sightlines, finish, upkeep and environment, with specification questions in the result.
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