When the intention with the renovation job will be to promote the assets then secondary glazing is unlikely to extend its price. Or else, if the prevailing window frames are in a superb state of restore (needing not more than a coat of paint, say) and have a look that https://remingtonggezx.livebloggs.com/41152281/the-smart-trick-of-cost-effective-glazing-that-nobody-is-discussing