Choosing the right type of windows

Although very traditional, wood windows remain a popular choice, and quality continues to improve due to new manufacturing processes. Their insulation properties are also well-known.

Wood loses points when it comes to maintenance. Stain or water-repellent paint applied periodically is an excellent way to maintain weather resistance, but it is of course time-consuming. Frames are generally made of cedar or pine.

Advantages

• Rigidity and insulating properties are well-known
• No other material can match the charm and warmth of natural wood

Drawback

• Substantial maintenance

The interior frame may remain natural wood, while the exterior frame is covered with PVC or aluminum.

Either PVC or aluminum-clad, the water tightness of the cladding is extremely important. If the cladding is not sufficiently watertight, the wood will eventually rot.

Aluminum-clad wood: The most expensive models are covered with extruded aluminum profiles attached to the wooden frame on the outside, while the least expensive models , are made with folded aluminum sheets.

PVC-clad wood: The PVC-covered window frame is built along the same lines, meaning that PVC is shaped to cover the wood frame.

Advantage

• Interesting compromise for those who want the qualities of wood without the maintenance of an exterior frame

Drawbacks

• PVC-clad wood: must be sufficiently thick to be resistant
• Aluminum-clad wood: variable quality

Aluminum is incontrovertibly the most rigid of all materials used in window manufacturing, enabling slimmer frames and greater emphasis on the glass.

However, the high degree of thermal conductivity in aluminum makes it less energy efficient. Manufacturers have made improvements by injecting polyurethane foam into the actual chassis of the window and adding a thermal barrier (or bridge) between the exterior and interior components.

Advantages

• Material with the best rigidity
• Impressive life span
• Requires virtually no maintenance

Drawback

• Poor insulation

Pultruded fibreglass is new to the world of windows. The quality is superior on every level, but unfortunately so is the price. Only a few manufacturers have this option available at the present time.

Advantages

• Rigidity comparable to that of metal
• Good energy efficiency
• Versatile
• Overall superior quality

Drawback

• Very expensive