New ENERGY eSash Windows Complete

If you already have Wood Sash Windows then you can probably avoid the expense & disruption of complete replacement so we recommend that you look at the Existing Sash Windows page as even 100+ year-old windows can usually be rejuvenated, retaining the original appearance closely.

New complete Victorian, Georgian or Modern Wood energy eSash Windows

[we are not even going to consider plastic sash windows as they only offer low cost - at a high price in other aspects, for example the claim of 'no maintenance' is true but as one expert put it the full phrase is 'no maintenance possible'].

The real wood choice is as follows:

	Option	Pros	Cons
1	Traditional box-sash joinery	Fine attractive solution. Long life & low maintenance if chosen well. The important considerations are: Species & grades of wood, treatment, finish, workmanship & glazing detail. In addition you need to ensure that the design has at least been modified to support drained & vented glazing (6mm clear perimeter glass channel is the recommended minimum - but you really need greater)	Heavy profiles necessary to take Sealed-Unit double-glazing, with sufficient strength & proper edge clearance reduce the glass area. example of the traditional 'thick' sections for double-glazing here 'Traditional Joinery' means standard profiles & joints. These windows are not 'designed' from a technical perspective - they are essentially made as they always have been but with heavier sections to cope with twice-as-thick & heavy glass units.
2	Technical Design Sash Windows	Designed for the job. Technically superior. Draining profile will give long-life to frames and glazing by ensuring no water retention. Micro-porous, factory applied finishes will ensure good looks for 10 years or more. Can then be refinished easily to return to as-new. The best will achieve a slimness of profile similar to Victorian sash windows optimised for slimness. Materials are also important: high spec glazing (warm edge spacer, low E heat reflector, toughened); top quality, long life, low maintenance real wood. for technical detail see also 'The Window Man' the voice of experience	Beware of the following: wide profiles - mainly the sashes, but also surrounding frame) timber cut/machining after treatment (loses protection) Hand painting after assembly or even after fixing (pre-assembly component level factory applied finishing is vastly superior) Insufficient glazing edge clearance (the spacers need cover to protect them from ultra-violet radiation) low grade timber (can swell & warp, causing sticking) standard aluminium DG spacers (alum sits alongside copper as a heat exchanger - it is the 4th known best conductor of heat!) narrow edge spacers (less depth = sooner degradation) see Fenestration Expert Blog regarding poor practices

Option

Pros

Cons

Traditional box-sash joinery

Fine attractive solution. Long life & low maintenance if chosen well.

The important considerations are:

Species & grades of wood, treatment, finish, workmanship & glazing detail. In addition you need to ensure that the design has at least been modified to support drained & vented glazing (6mm clear perimeter glass channel is the recommended minimum - but you really need greater)

Heavy profiles necessary to take Sealed-Unit double-glazing, with sufficient strength & proper edge clearance reduce the glass area.

example of the traditional 'thick' sections for double-glazing here

'Traditional Joinery' means standard profiles & joints. These windows are not 'designed' from a technical perspective - they are essentially made as they always have been but with heavier sections to cope with twice-as-thick & heavy glass units.

Technical Design Sash Windows

Designed for the job. Technically superior.

Draining profile will give long-life to frames and glazing by ensuring no water retention.

Micro-porous, factory applied finishes will ensure good looks for 10 years or more. Can then be refinished easily to return to as-new.

The best will achieve a slimness of profile similar to Victorian sash windows optimised for slimness.

Materials are also important: high spec glazing (warm edge spacer, low E heat reflector, toughened); top quality, long life, low maintenance real wood.

for technical detail see also 'The Window Man' the voice of experience

Beware of the following:

wide profiles - mainly the sashes, but also surrounding frame)
timber cut/machining after treatment (loses protection)
Hand painting after assembly or even after fixing (pre-assembly component level factory applied finishing is vastly superior)
Insufficient glazing edge clearance (the spacers need cover to protect them from ultra-violet radiation)
low grade timber (can swell & warp, causing sticking)
standard aluminium DG spacers (alum sits alongside copper as a heat exchanger - it is the 4th known best conductor of heat!)
narrow edge spacers (less depth = sooner degradation)
see Fenestration Expert Blog regarding poor practices

Real Wood Sash Windows engineered for Technical Excellence.

Our energy eSash window scores top marks on every count - we know of no way to improve it (but we are always open to suggestions, even debate).

email RugbySash (feel free to request a call-back)
OR call 024 7627 3417 to discus your New Wood Sash Window Requirements
Windows designed to perform to 2011 Regulations but still look 100 years old

BUT HOW CAN IT COMPARE WITH "LOW MAINTENANCE, LONG-LIFE uPVC?"

Here's how:

1. Neither material needs maintenance. The ENERGY eSASH does not rely on paint for protection so feel free to ignore it forever.

However if you want your windows to look tip-top then you can 'spruce-them-up' once every 10 years or so with a new topcoat. YOU CANNOT DO THIS WITH PLASTIC and acid rain just eats away (ever seen smart uPVC windows that were more than a few years old?)!

2. The life expectancy of our windows is easily 3 TIMES PLASTIC>, partly (due to 1.) plastic just gets worse & worse, partly because plastic goes brittle with age (ultra-violet light attacks everything - thats why you need to be able to refresh the surface finish).

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