Union Jubilee Clutch.

[Nick]

If you use quality kiln dried oak to make your window frames with they will still need well protectng, either with paint or many coats of a top notch varnish but I guess you know that already. The same painting regime also applies to the wall jamb faces, the header face and the sill face of the window frame

I've always eschewed varnishes & paints - All our windows use Osmo UV 420 oil as the finish - really simply to apply & re-coat - no sanding down - just wipe down and slap on a new coat every other year or so.

Here a photo of some oak French doors that were BLACK with stain as they are completely exposed to the prevailing winds & weather (we are on top of a hill) - I used oxalic acid gel to clean them.... (Osmo sell it as their "wood reviver" but I made my own [eventually!] - the door on the left has been brushed with Osmo UV 420 oil - the one on the right is after oxalic treatment but before oiling)