The clue is in the title, if the sash doesn’t slide then its not a sliding sash. Not everything goes to paln 100% of the time, recently we were decorating the internal of a building that had new sliding sash windows fitted (about 2 years ago) decorated externally, but were left for the scheme of the room to be decided before any finish bar the primer be applied internally.
When it came to painting the windows it was obvious something wasn’t right, the top sash wouldn’t move more than 4 inches and the same was said for the bottom internal sash. Closer inspection and a keen ear helped to determine that the internal weight was fouling on something and the was too tight stopping the sash moving upwards. Not a difficult issue and easily fixed before the paintwork was finished.
First we removed the and freed the lower sash, we didn’t need to dismantle the whole unit, just gain access to the weights to see what was the problem. After loosening the we could see that the waddle interfering with the weight as it was either not hanging correctly or had bowed for some reason, the problem that this created is the fact that you cannot gain access to the waddle unless you remove the enitre window and take the backing off. Normally the cavity should be free from anything that woul snag the weights, but the only way to fix the problem was to pin back the waddle to allow space for the weight to move freely.
After reattaching the and back in place we check the sashes move freely before fixing the. The needed a slight adjustment from before as they were too tight to the sash on the top half preventing the sash from opening. And there we have it, a beutiful sash window, running freely and ready for decoration.
by Matthew Evans of Welsh Heritage Decor