Help with windows

[Mossball]

I've bought a 1960s house. The windows in most rooms are like boxes that project out beyond the wall, so they have fixed glass panes at the side and the windowsill is at least half a metre in depth. They're all big, over 1m or more wide. They're all uPVC and are rosewood in colour.

We have condensation both on the windows and on the windowsill where it projects beyond the house. Will this projection mean more heat is being lost compared to a traditional window that doesn't project? Would the condensation stop with a normal window?

Will the projection add value or not? In our kitchen it's really hard to reach and open a window. Having said that they look great with the windowsills covered in plants and in the kids rooms they are perfect window seats.

The house is stone clad on two sides and then we have brown bricks on the other two sides. The stone cladding has a lot of black in it. What colour would you pick if I did replace them? Would aluminium be better?

Any advice appreciated.

are the frames in good condition, sometimes the problem is the glass unit and you can just replace that. Some condensation is normal though.

I've had to replace a number of blown units already. But I've now noticed a couple more. The condensation I'm worried about is on the inside which I know is partly because it's cold. Like everyone else we've cut back on heating. But I'm assuming by projecting like they do more cold air can surround the whole window meaning condensation is much more likely.

Windows are going to be less heat efficient than walls, therefore less windows means less heat loss obviously. Ref condensation, you can reduce this via ventilation a dehumidifier (uses 300w an hour and can also dry your clothes) or turning up your heating. You're never going to be rid of it, even with different windows.

If the windows look nice, I'd keep them myself as you'll otherwise spend a lot of money to reduce the appeal of your house. There's only so much you can do with insulation and fuel costs. Have you though of thick curtains in front of the window alcoves?