Another helpful process is to apply a protective sealant to the sashes and frames. This sealant functions as a barrier against humidity, avoiding rot and decay. Moreover, it helps to repel dust and Grime, producing cleansing even easier. Sash window draught proofing diagram As you could see from the picture https://windowinsulation28406.life3dblog.com/34888088/5-essential-elements-for-sash-windows