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FAQ’s
FAQ’s
General FAQ’s
What should I consider before I take steps to replace my windows?
What are the benefits of triple glazing?
Installation and compliance
What are building regulation rules for changing widows (FENSA/Certass)?
Do I need FENSA or CERTASS registration to install windows?
What are the ventilation requirements when replacing windows?
Measuring and sizing
How do I measure a window opening correctly?
What is the difference between frame size and aperture size?
How much clearance should I allow when measuring for a replacement window?
How do I measure for a bay window?
What tolerances should I work to when ordering bespoke sizes?
Energy & Ratings
What do the Window Energy Ratings (A++ to E) mean?
What is a U-value and what level should I be targeting?
What is a Whole Window U-value vs a Centre Pane U-value?
What gas fill options are available and how do they affect performance?
What is the difference between BFRC and TRR rating?
What is the g-value of a sealed unit?
Glass and sealed units
Why Have I Got Mist Inside My Sealed Unit?
How do I replace a sealed unit?
When is toughened (safety) glass required by law / Building Regulations?
When is laminated glass required instead of toughened?
What is the difference between toughened and laminated glass?
What causes a sealed unit to fail, and how do I spot it?
What is the typical lifespan of a sealed unit?
Can I replace just the glass unit without changing the whole frame?
What is coated glass and how does it work?
What is the difference between soft coat and hard coat glass?
Which side of the glass should a coating face?
What is self-cleaning glass and where is it best used?
What is acoustic glass and when should I specify it?
Safety & Security
How Can I Make a Vulnerable Window More Secure?
Silicone & Sealants
What sealant should I use to fit windows – Alkoxy v’s Oxime
Window noise pollution reduction
How do I make my window more soundproofed?
Can I fit an acoustic-reducing vent to a window retrospectively?
How does laminated glass reduce noise?
