Ask the experts
Q Before we choose all the windows for our renovation project we’d really like some advice as to the key questions we should be asking a window company. Can you help?
CAROL AND COLIN, PORTSMOUTH
It doesn’t really matter whether you’re opting for contemporary windows or traditional sashes, there are lots of key questions to get answered whatever the style you choose. Here are my top five topics to discuss with your window supplier…
MATERIAL CHOICES
Where is the material from? If it’s timber, is it responsibly sourced? If it’s aluminium, is it consistently sourced or made from various elements?
SIGHTLINES
If you’re looking for a modern, sleek appearance, you’ll need to talk sightlines. How thin is the sightline? Some suppliers such as Origin can produce frames as thin as 65mm and even lower for fixed units, meaning less frame, more glass and more view. Do the external frames overlap? Some suppliers can offer a flush finish which is good for a simpler, smarter external appearance.
HANDLES AND VENTS
Don’t forget the tactile elements, such as the handles and even the trickle vents (if specified). A nice window can be let down if the touchable elements feel cheap and light.
WARRANTIES AND SERVICES
Look at the warranties and service offered by the supplier. Many offer good standard warranties that are significantly extended if the windows are fitted by the company’s approved installers.that’s a benefit, but many aren’t the most
WINDOW ENERGY RATING (WER) Window Energy Ratings detail how energy efficient a window is. All new windows carry a sticker which details air leakage (L factor), thermal transmittance (U value) and solar factor (solar gain).
competitive for installation costs.
The lead-in times can be several months — so you’ll have a big job early on (or before you’ve started on site) in terms of ensuring window openings sizes are correct. Double check with the supplier and your builder, as different companies have different interpretations of what window opening sizes mean.
THE FRAMES
Check on the frame basics. For example, ensure that the frame within an aluminium window has a thermal break (the frame doesn’t directly transition between inside and out without an air gap), which is critical in terms of energy performance.