I need to replace a wooden 'Georgian' style window that is rotten. I know how to get it out but have never fitted a double glazed unit before. How does the frame fasten to the wall to make it secure- the old one simply has nails driven through and the heads filled and painted over. Is this how a wooden sealed unit fixes ? Does the glass come out first and the refix it in the frame after fitting that ?
Is it a DIY or have I to call in the 'Professionals" ?