--- title: Windows & Doors Advice & Guides | SM Windows & Doors York | Energy Efficiency description: Energy Efficiency | Expert advice on windows, doors, glazing and home improvements from SM Windows & Doors, York. Costs, buying guides, repairs, regulations and design inspiration. --- [![SM\_Logo\_Final\_Lught](https://smwindowsanddoors.co.uk/hs-fs/hubfs/SM_Logo_Final_Lught.webp?width=140&height=80&name=SM_Logo_Final_Lught.webp "SM_Logo_Final_Lught")](https://smwindowsanddoors.co.uk) - About - [About](https://smwindowsanddoors.co.uk/about) - Doors - [uPVC Doors](https://smwindowsanddoors.co.uk/upvc-doors-york) - [Sliding & Bifold Doors](https://smwindowsanddoors.co.uk/aluminium-sliding-bi-fold-doors) - [Composite Doors](https://smwindowsanddoors.co.uk/composite-doors-york) - [Heritage Aluminium Doors](https://smwindowsanddoors.co.uk/heritage-aluminium-windows-doors) - [Door Repairs](https://smwindowsanddoors.co.uk/window-door-repairs-york) - Windows - [uPVC Windows](https://smwindowsanddoors.co.uk/upvc-windows-york) - [Casement Windows](https://smwindowsanddoors.co.uk/casement-windows-york) - [Sash Windows](https://smwindowsanddoors.co.uk/sash-windows-york) - [Timber Windows](https://smwindowsanddoors.co.uk/timber-windows-york) - [Heritage Aluminium Windows](https://smwindowsanddoors.co.uk/heritage-aluminium-windows-doors) - [Lanterns & Roof Lights](https://smwindowsanddoors.co.uk/korniche-lanterns-flat-roof-lights) - [Window Repairs](https://smwindowsanddoors.co.uk/window-door-repairs-york) - Conservatories - [Conservatories](https://smwindowsanddoors.co.uk/conservatories-orangeries-york) - [Orangeries](https://smwindowsanddoors.co.uk/conservatories-orangeries-york) - Resources - [Gallery](https://smwindowsanddoors.co.uk/gallery) - [Brochures](https://smwindowsanddoors.co.uk/brochure-downloads) - [Blog](https://smwindowsanddoors.co.uk/blog) - [Reviews](https://smwindowsanddoors.co.uk/customer-reviews) - [Contact Us](https://smwindowsanddoors.co.uk/contact) [Request A Quote](https://smwindowsanddoors.co.uk/request-a-quote) [![SM\_Logo\_Final\_Lught](https://smwindowsanddoors.co.uk/hs-fs/hubfs/SM_Logo_Final_Lught.webp?width=140&height=80&name=SM_Logo_Final_Lught.webp "SM_Logo_Final_Lught")](https://smwindowsanddoors.co.uk) [Request A Quote](https://smwindowsanddoors.co.uk/request-a-quote) - About - [About](https://smwindowsanddoors.co.uk/about) - Doors - [uPVC Doors](https://smwindowsanddoors.co.uk/upvc-doors-york) - [Sliding & Bifold Doors](https://smwindowsanddoors.co.uk/aluminium-sliding-bi-fold-doors) - [Composite Doors](https://smwindowsanddoors.co.uk/composite-doors-york) - [Heritage Aluminium Doors](https://smwindowsanddoors.co.uk/heritage-aluminium-windows-doors) - [Door Repairs](https://smwindowsanddoors.co.uk/window-door-repairs-york) - Windows - [uPVC Windows](https://smwindowsanddoors.co.uk/upvc-windows-york) - [Casement Windows](https://smwindowsanddoors.co.uk/casement-windows-york) - [Sash Windows](https://smwindowsanddoors.co.uk/sash-windows-york) - [Timber Windows](https://smwindowsanddoors.co.uk/timber-windows-york) - [Heritage Aluminium Windows](https://smwindowsanddoors.co.uk/heritage-aluminium-windows-doors) - [Lanterns & Roof Lights](https://smwindowsanddoors.co.uk/korniche-lanterns-flat-roof-lights) - [Window Repairs](https://smwindowsanddoors.co.uk/window-door-repairs-york) - Conservatories - [Conservatories](https://smwindowsanddoors.co.uk/conservatories-orangeries-york) - [Orangeries](https://smwindowsanddoors.co.uk/conservatories-orangeries-york) - Resources - [Gallery](https://smwindowsanddoors.co.uk/gallery) - [Brochures](https://smwindowsanddoors.co.uk/brochure-downloads) - [Blog](https://smwindowsanddoors.co.uk/blog) - [Reviews](https://smwindowsanddoors.co.uk/customer-reviews) - [Contact Us](https://smwindowsanddoors.co.uk/contact) # SM Windows & Doors blog [Doors](https://smwindowsanddoors.co.uk/blog/tag/doors) [Windows](https://smwindowsanddoors.co.uk/blog/tag/windows) [Costs & Buying](https://smwindowsanddoors.co.uk/blog/tag/costs-buying) [Regulations & Security](https://smwindowsanddoors.co.uk/blog/tag/regulations-security) [Design & Inspiration](https://smwindowsanddoors.co.uk/blog/tag/design-inspiration) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) [Conservatories & Roofs](https://smwindowsanddoors.co.uk/blog/tag/conservatories-roofs) [Repairs & Maintenance](https://smwindowsanddoors.co.uk/blog/tag/repairs-maintenance) [York & Local](https://smwindowsanddoors.co.uk/blog/tag/york-local) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [How Energy Efficient Are Modern uPVC Windows?](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/how-energy-efficient-are-modern-upvc-windows) Modern uPVC windows are a long way from the basic white frames of twenty years ago. They cut heat loss ... [SM Windows & Doors Oct 5, 2026, 3:30:00 PM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [How A-Rated Glass Cuts Your Heating Bills](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/how-a-rated-glass-cuts-your-heating-bills) If your rooms feel cold near the windows and the radiators seem to be working overtime, the glass is often ... [SM Windows & Doors Oct 5, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Energy-Efficient Doors: What to Look For](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/energy-efficient-doors-what-to-look-for) A front door is one of the hardest-working parts of your home, and an old one can leak heat all winter ... [SM Windows & Doors Sep 25, 2026, 3:30:00 PM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Double or Triple Glazing? Which Is Worth the Cost](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/double-or-triple-glazing-which-is-worth-the-cost) It is a fair question, and one we get asked a lot: is triple glazing better than double glazing, and is the ... [SM Windows & Doors Sep 25, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Double Glazing: uPVC or Aluminium Frames? Compared](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/double-glazing-upvc-or-aluminium-frames-compared) Once you have decided on double glazing, the next choice is the frame, and for most homeowners that means ... [SM Windows & Doors Sep 24, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Do New Windows Improve Your EPC Rating?](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/do-new-windows-improve-your-epc-rating) If you are trying to lift your home's energy score, glazing is an obvious place to look. New windows can help ... [SM Windows & Doors Sep 16, 2026, 3:30:00 PM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Average U-Values for Double Glazing Explained](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/average-u-values-for-double-glazing-explained) When you are comparing window quotes, the U-value keeps cropping up, and it is one of the most useful numbers ... [SM Windows & Doors Aug 14, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Are Triple-Glazed Windows Worth It in the UK?](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/are-triple-glazed-windows-worth-it-in-the-uk) Triple glazing sounds like the obvious upgrade: if two panes are good, three must be better. The honest ... [SM Windows & Doors Aug 13, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [Are A-Rated Windows Worth the Extra Cost?](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/are-a-rated-windows-worth-the-extra-cost) When you are pricing up new windows, you will quickly run into energy ratings, and the sales patter that goes ... [SM Windows & Doors Aug 3, 2026, 3:30:00 PM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [Energy Efficiency](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency) 3 Min Read ### [A-Rated or C-Rated Windows? Is the Upgrade Worth It](https://smwindowsanddoors.co.uk/blog/sm-windows-doors-blog/a-rated-or-c-rated-windows-is-the-upgrade-worth-it) When you are choosing new glazing, you will see windows sorted into energy bands, and be nudged towards the ... [SM Windows & Doors Jul 27, 2026, 10:30:00 AM](https://smwindowsanddoors.co.uk/blog/author/sm-windows-doors) [1](https://smwindowsanddoors.co.uk/blog) [2](https://smwindowsanddoors.co.uk/blog/tag/energy-efficiency/page/2) ## Phone: 07833387823 Email: [Sam@smwindowsanddoors.co.uk](mailto:Sam@smwindowsanddoors.co.uk) Opening times: Mon - Fri: 09:00 - 17:00 Sat-Sun: By Prior Appointment [Follow us on Facebook](https://www.facebook.com/people/SM-Windows-Doors/100093013267883/) [Follow us on Instagram](https://www.instagram.com/smwindowsanddoors/) ![x59dcc190ea7d320001f0083a\_logoAsset-2-1.jpg.pagespeed.ic.lk8k-280iY](https://smwindowsanddoors.co.uk/hs-fs/hubfs/x59dcc190ea7d320001f0083a_logoAsset-2-1.jpg.pagespeed.ic.lk8k-280iY.jpg?width=300&height=106&name=x59dcc190ea7d320001f0083a_logoAsset-2-1.jpg.pagespeed.ic.lk8k-280iY.jpg "x59dcc190ea7d320001f0083a_logoAsset-2-1.jpg.pagespeed.ic.lk8k-280iY")