Keep your authentic Sash Window Frames - UPGRADE them

with Slot-in Wood Replacement eSASH energy Sashes

mouse-over picture to compare original with 'invisible' upgraded replacement sashes

2010/11 Bulding Regulations Compliant
Performance Certificate U<1.6
(full frame, not just glass)
issued with every installation

REPAIR / UPGRADE / replace?

box-frames - minor repairs are sometimes necessary and this is generally cost-effective

simple DRAUGHTSTRIPPING on your old sashes will help to improve insulation BUt it is JUST TINKERING with the problem - it has limited impact, it will not stop ice/condensation on the inside & you still have old sashes

in contrast we provide neat new SLOT-IN energy ESASHES which keep ORIGINAL GOOD LOOKS & give a NEW lease of LIFE

new or complete replacement windows are occasionally necessary - here narrow frame components are essential or else they just look wrong - [but please, not at the risk of early-failure slim glazing!]

(see other page example pic
of a 'fat' frame profile)

Achieve 2011 regulations 'invisibly' within your existing
Victorian / Georgian frames
low disruption, high insulation, very long life, very low maintenance

Why we don't offer Slim (10 or 12mm) glazing?

because in slim units less is less .. and worse:

Slim Sealed Units are technically too big a compromise..

Reduced Edge Cover = Reduced Lifetime

Edge Sealant degrades over time and we don't think 5 years (or even 10) is a sufficient lifetime for glass in windows.

.. also glazing slim units into slim bars is poor practice technically (see the expertexpert link below ...)

.. and 12mm units cannot achieve a full-frame U-value to meet current regulations - an insulation compromise