What do window energy ratings mean? +
Window energy ratings run from A++ (most efficient) down to C. An A-rated window significantly reduces heat loss compared to older double glazing and can cut your heating bills. The rating takes into account the glass, frame, and spacer bar performance combined. Since 2002, all replacement windows must meet a minimum standard of C-rated or equivalent U-value of 1.4 W/m2K.
What is the difference between UPVC, aluminium and timber windows? +
UPVC is the most popular and affordable option — low maintenance, good insulation, and widely available. Aluminium frames are slimmer, stronger, and suit modern designs, but cost 40-60% more than UPVC. Timber frames offer a traditional look and excellent insulation but require regular painting or staining every 3 to 5 years. Each material has its strengths depending on your property style and budget.
How long does it take to replace a window in Cardiff? +
A single window replacement typically takes 1 to 2 hours from start to finish. A full house of windows in Cardiff usually takes 1 to 2 days depending on the number of openings and any complications like rotten lintels or damp. Your fitter should leave each opening weathertight before moving on to the next.
Is triple glazing worth the extra cost? +
Triple glazing costs around 30-50% more than double glazing and provides a modest improvement in thermal performance — typically reducing heat loss by a further 20-30%. For most UK homes, A-rated double glazing is the best value option. Triple glazing makes most sense if you live in an exposed or particularly noisy location, or if you are building a passive house to very high energy standards.
Are there window fitters in Cardiff who do free surveys? +
Most reputable window fitters in Cardiff offer free, no-obligation home surveys and quotes. During the survey, the fitter will measure your windows, discuss frame materials and glass options, and provide a written quotation. Be wary of high-pressure salespeople who want you to sign on the spot — a trustworthy fitter will give you time to compare quotes.
Can window fitters improve my home security? +
Yes, modern replacement windows come with significant security improvements over older designs. Look for windows with multi-point locking mechanisms, internal beading (glass fitted from inside so it cannot be removed from outside), anti-lever hinges, and laminated or toughened glass. Secured by Design accredited windows meet police-approved standards for burglary resistance.