Before comparing materials, ask the right questions for your window project
Renovation or new build: what changes for the window (full removal, installation over existing frame)
In renovation, your choice of installation method matters as much as the window itself. Full removal starts from scratch and helps correct airtightness. Installing over the existing frame is faster if the current frame is sound and straight. To go further on these installation options, you can check our guide on installation with full removal vs. over an existing frame.
Exposure, insulation, and comfort: wind, sun, noise, humidity
Before choosing a material, look at what the facade takes on. Wind and rain call for good airtightness. Sun can raise the temperature, and noise requires suitable glazing. In humid areas, aim for a durable finish and consistent ventilation.
Budget, lead times, and finish level: what you really want from your windows
Set your budget, your lead times, and the expected finish level in writing. A well-installed window, with clean trim and precise adjustments, avoids touch-ups and complaints.
PVC window comparison: strengths, limits, and cases where it's the best choice
Thermal and acoustic insulation: when PVC makes the difference
A well-designed PVC window, with multi-chamber profiles and suitable double or triple glazing, quickly limits heat loss. You gain winter comfort, and often quiet too, provided the installation and airtightness are done carefully. For a renovation job, PVC is a good ally when you're after a good Uw without blowing the budget.
Durability, maintenance, and colour retention: points to watch on site
Maintenance is simple. A gentle wash is enough, no need for wood stain. The points to watch mainly concern the quality of the profile, the reinforcements, and thermal expansion. On dark colours, heating up in the sun can warp the sashes. Also check the film warranty and long-term durability. In short, watch out for UV exposure and adjustments.
Value for money: which homes and window configurations it suits
PVC is often the best choice for homes with several windows to replace, in standard sizes, when a tight budget matters. For large glazed openings or very slim frames, aluminium keeps the advantage in rigidity. In heritage areas, wood remains more visually accepted. Before comparing, you still need to know how many units are involved: the AI spots the openings on the façades and lists them for pricing.
Aluminium window comparison: performance, slim profiles, and constraints to know
Light input and large sizes: the advantage of slim profiles
Aluminium allows for rigid sashes with narrower frames. The result is a larger glazed surface, so more natural light. It's a real plus for sliding doors and wide openings, where a less rigid window quickly needs thicker profiles. In exchange, the performance level depends heavily on the glazing chosen, the installation quality and above all the width of the profile's thermal break.
Thermal break: the key element for an aluminium window in 2026
Aluminium naturally conducts both cold and heat. In 2026, always aim for a thermal break (often an insulating strip) and compare the Uw and Sw figures, not just the look. A well-designed aluminium window limits discomfort near the glazing and reduces the risk of condensation on sensitive areas.
Strength, maintenance, and customization: when aluminium is the right choice
On durability, aluminium holds up well against impacts and weather. Maintenance stays simple, and powder coating offers a wide choice of colours, including two-tone finishes. Plan ahead for a generally higher cost and the need to check the AEV classification (air, water, wind resistance) based on the building's exposure.
Wood window comparison: comfort, aesthetics, and maintenance requirements
Natural insulation and the feel of comfort: what wood brings day to day
Wood is a naturally low-conductivity material. A wood window limits cold-to-the-touch surfaces and contributes to a more consistent feeling of thermal comfort, especially near the glazing. Properly installed, it also helps with acoustics, with sashes that close "solid," without slamming.
Maintenance and protection: stain, paint, sensitive points (sill, drip cap)
Maintenance is all about protecting the wood. Stain or paint, the goal is to maintain a continuous film and monitor exposed areas. The bottom of the frame and the drip cap take on water first. An annual visual check prevents small cracks from becoming major repairs.
Heritage and local constraints: when wood windows are expected
In heritage areas, wood windows are often favoured to respect the look of the facades. Depending on the municipality, profiles, colours, and glazing bars can be regulated. It's better to check with the town hall beforehand and, if needed, the heritage authorities. You save time and avoid rejections.
Composite window (wood/aluminium): the right compromise or an unnecessary extra cost?
How composite works: wood inside, aluminium outside, and impact on durability
Composite is a window with wood on the interior side for comfort and a warm look, and aluminium on the exterior side to withstand rain, UV, and temperature swings. As a result, maintenance is often reduced to cleaning, without regular restaining. Durability mainly depends on the quality of the wood-aluminium assembly, the joints, and water drainage. A good product limits the risk of warping and maintains good sealing over time.
Price and product tiers: how to avoid a misleading comparison
Composite is generally more expensive than PVC and often on par with a good-tier aluminium window. To compare fairly, put the glazing, the insulation level (Uw), air and water tightness, and the hardware on the same line. At equal performance, the difference mainly comes from the finishes, the wood species, the coatings, and the options. That comparison only holds with reliable references, hence multi-brand catalogues with verified technical characteristics and prices kept up to date.
Final choice: which criteria decide between PVC, aluminium, wood, and composite for your windows
The decision comes down to three simple questions. What's the real insulation level after installation. How much maintenance are you willing to accept. What look you're after for the facade and the interior. PVC for budget, aluminium for large sizes, wood for heritage, composite for a balance between maintenance and aesthetics.
