Wooden windows

[Hoolahoophop]

Specifically wooden sash windows, double glazed, reasonable condition. But with gaps between the sash and the casing you could poke a ruler through.

Anyone have an experience, tips on how to fill the gaps without stopping the sash from sliding smoothly come summer.

Partly depends where the gaps are. There are couple of brush systems that youcn get fitted into sash windows. We had them in single glazed for years and they were fitted around all the edges - but it was a professional jog as they chase the brush/foam/wool into a special channel which is fitted round the edges of the sash.

Do you have the screw type fasteners, if not they might improve the horizontal mid rail? They tend to pull the two window sections together at the bar.

Also you could just use draught excluder tape on the top bottom and mid rails and take it off in the summer?

Ventrola system. Will stop the drafts.

Thanks, its down the sides, the horizonal is good. I was hoping there might be some kind of brush I could install myself to save some money! They modernish windows house is only 40 years old so not period and we are tempted to change them to PVC when we have the money.

You can buy ventrolla and fit them yourself if you like I think but you will have to disassemble the windows to cut a groove out to put the brushes in.