Why we won't use Slimlite

Why we won't use Ultra-slim double-glazing:

It's possible to write a long list of shortcomings, but briefly:

• They fail to conform to industry standards in both construction and installation

• Their insulation performance falls far short of what can be achieved by other, cheaper, methods

• The installation is labour-intensive. It makes money for the installer, but provides the customer with poor value for money.

Eg:
Relative cost & performance for sealed unit double glazing in two 19th Century 8/8 Georgian sash windows:

SupaSash std 24mm                   U=1.2         £88

Slimlite 12mm                            U=1.9        £338

SupaSash HM 24mm                  U=0.9        £377

Spacia vacuum 10mm                U=1.4      £1852

Add in labour costs of perhaps £100 or more, (including either balances or lead weights) and even with the cost of two new sash frames, SupaSash wins hands-down on cost, efficiency, and proven life-expectancy.

Here are more links for the full story:

more on ultra slim sealed unit double glazing

Expertexpert forum discussion: Ultra slimline sealed units

Expertexpert forum discussion: Does anyone know anything good about ultra slim sealed units?