Dbl Glazing spec

Normally the pillars in Victorian terraced houses are of the "Sandstone", type?

-- Sir Benjamin Middlethwaite

Are you allowed to have exposed pillars inside - they will have poor insulation ? Maybe the internal facias are insulated ? Simon.

Thanks.

I'm leaning toward the thought that if the upvc frames are fitted well,

the sandstone pillars wouldn't be a significant heat loss source.

Arthur

The house I'm buying has concrete/stone (not sure) pillars around the curved bay, The windows are wooden single-glazed and fit entirely inside the pillars, such that the window sill is actually very narrow. I'll have to think about this when I get round to replacing the windows. Simon.

In the context of replacement windows this is not a bay. It is 3 flat windows fitted into 3 apertures so bay support poles are not required. The new windows would be fitted to the brick(stone)work in each section so I guess that you can do what you wish with the internal cladding. If existing windows are vertical sash sliders, as is often the case in this type of property, then you might have an issue with the old sash boxes. Otherwise, no problem.