What Important Things Should I Consider About My Home When Buying New Glazing and Windows?

Upgrading your glazing and windows is a big decision—one that affects comfort, energy bills, security, and even the value of your home. Whether you’re renovating a Victorian terrace in Hackney or extending a 1930s semi in Leytonstone, here’s what you need to know before making your choice.

Here are some helpful questions you can ask your specialist to assess their expertise, understand the process, and ensure you get the best service for your home.

Energy Efficiency & Thermal Comfort

With UK energy costs rising, choosing the right glazing can save you money in the long run. Double glazing is standard, but triple glazing can be a smart upgrade—especially for north-facing rooms or large glass extensions.

Key Features to Look For:

• Low U-Value – Aim for 1.2 W/m²K or lower (lower = better insulation).

• Low-E Glass – Reflects heat back into your home while reducing overheating in summer.

• Argon or Krypton Gas-Filled Units – Improves insulation compared to standard air-filled glass.

• Warm Edge Spacers – Reduces condensation and heat loss at the edges of the glass.

Actionable Tip: Check the Window Energy Rating (WER). A++ is the most efficient, and a good investment if you’re planning to stay put.

Material Choices: Finding the Right Fit

Your choice of frame material affects durability, maintenance, and how well your windows match your home’s style.

Materials	Pros	Cons	Best For
UPVC	Affordable, low maintenance, energy-efficient	Can look bulky, limited colour choices	Budget-conscious homes, rental properties
Aluminium	Modern, slim frames, strong & durable	More expensive, less insulation (unless thermal broken)	Contemporary homes, large glass openings
Timber	Classic look, great insulation, long lifespan	Higher maintenance, more expensive	Period homes, conservation areas
Composite	Low maintenance, strong, good insulation	Pricey	High-end renovations, long-term investments

Actionable Tip: Want the Crittall look without the Crittall price tag? Consider slimline aluminium for a similar effect at a lower cost.

Noise Reduction – A Must in London!

If you live near a main road, train line, or flight path, standard double glazing won’t cut it. Acoustic glazing (also called soundproof glass) uses laminated layers to block noise.

Best Options for Soundproofing:

• Laminated Glass – A layer of PVB (polyvinyl butyral) reduces external noise.

• Different Glass Thicknesses – Mixing pane thicknesses disrupts sound waves.

• Sealed Frames – Gaps around windows = noise leaks. Ensure a professional airtight installation.

Actionable Tip: Ask for Rw (Weighted Sound Reduction Index) ratings. Look for Rw 40dB+ if you need serious noise control.

Security & Safety – Protecting Your Home

Windows are a common entry point for burglars, so security should be a priority—especially on ground floors and near extensions with large glass doors.

Essential Security Features:

• Multi-Point Locking Systems – More secure than traditional espagnolette locks.

• Internal Beading – Prevents burglars from removing the glass externally.

• Laminated or Toughened Glass – Harder to break than standard glazing.

Actionable Tip: Check that your windows meet Secured by Design (SBD) standards—it’s a UK Police-backed accreditation for security.

Budget Planning: What to Expect

Prices vary depending on the material, glazing type, and window size. Here’s a rough idea:

Window Type	Price per Window (Supply & Fit)
UPVC Double Glazing	£300 – £600
Aluminium Windows	£500 – £1,200
Timber Windows	£800 – £1,500
Triple Glazing Upgrade	+20-30% more than double glazing
Sliding / Bi-Fold Doors	£1,500+ per panel

Planning Permission & Aesthetics

• Listed buildings & conservation areas – You may need heritage-style windows or approval from the local council.

• Modern extensions – Consider frameless glazing or oversized sliding doors for a seamless indoor-outdoor feel.

• Matching your home’s style – Think about frame colour, sightlines, and handle styles to ensure consistency.

Actionable Tip: If you’re unsure about restrictions, check with your local council’s planning portal before making any commitments.

Final Thoughts

Choosing new glazing and windows is a balance between aesthetics, energy efficiency, security, and budget. Take the time to research materials, get professional advice, and invest in quality installation—it’ll pay off in comfort and savings over time.