London sash window refurbishment projects – today we will be replacing a sill section. To splice a sill section we need to remove stiles, inner window board, and in most cases inner cheek will need splicing.
Before we remove anything, we carefully measure the sill section, once we disturb the frame with sill removal we will never know the exact size required. The other benefit is we can cut our sill section and house it out correctly before removing the old one. This preparation is important because it allows us to quickly rebuild the framework once sill completely removed. It id not easy to board up, or screw sash without a sill section, and the draughts coming through the frame are quite significant.
Once sill is spliced out, we splice the sill stiles and front cheeks. The sill is then dropped in, window board re-attached, and then new spliced stiles are neatly inserted, screwed, and glued to give the frame strength once again. We will use an epoxy filler to fill any screw holes and joints. Once set the filler is sanded, and the sash window repairs primed and undercoated ready for decoration.
One thing to note. When cutting out the old sill we must do so as gently as possible to not cause any damage to the internal plaster work. There may be a timber plate under the sash. If this is the case then it can vibrate, very easily, causing plaster directly under the sill to fall off with very little pressure applied. This can only be avoided by being very conscientious. Sometimes however, you may be flat unlucky and the original window installer may have hammered 6 inch nails to the sill as the main original fixing. The chances of avoiding minimal damage is slim. If it does happen then the remedy is a bag of one coat plaster, rapid setting. Do not waste time using thistle and then skim. You will not be able to produce a finish that warrants the effort because of the joint. Instead patch as neatly as you can with one coat plaster, allow to set, and then sand the joint if troweling up didn’t provide a respectable finish. This solution is much more real world, eventually you will re-skim the entire wall and then a beautiful finish can be achieved. This is all part of sash window refurbishment. Another aspect I won’t go into fully on this post is double glazing existing sash windows. We should be looking to make upgrades to improve the environment and lower our fuel bills where we can.
All repairs are typically spliced with Pine wood as this is the material the window originally made with. London sash window refurbishment specialists can also be contacted if you feel this is beyond your level of DIY capability and it is wise even if you do not wish to have the work carried out by someone else, that you at least check the viability of repair first. Maybe email a few window companies and hope that one kind soul will give you some useful information. Normally a repair or replacement sill will cost in the region of £120-£160. It’s a healthy saving if you feel up to the challenge. A professional is unlikely to cause such damage to the wall – although as outlined, in some situations it’s possible and unavoidable. If your looking for a sash window refurbishment company in London then feel free to leave a comment, or if you’ve recently used one, please also leave a comment reviewing the company in question