Will new windows reduce noise from outside? +
Yes, replacing old single glazing or failed double glazing with modern sealed units will noticeably reduce outside noise. Standard double glazing reduces noise by around 25-30 decibels. For maximum noise reduction, ask about acoustic glass or unequal pane thickness (e.g. 6mm outer, 4mm inner) which disrupts sound vibrations more effectively. Triple glazing also offers improved sound insulation.
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.
How long does it take to replace a window in Belfast? +
A single window replacement typically takes 1 to 2 hours from start to finish. A full house of windows in Belfast 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.
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.
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.