This Old House general contractor Tom Silva repairs a window that won’t stay open. See below for a shopping list and tools. Click here to SUBSCRIBE to .If you’ve got an old house with double hung sash, sooner or later you’ll have to replace the gl DIYNetwork.com experts explain how to do the job yourself..This Old House general contractor Tom Silva shares some tricks of the trade for installing a new, long lasting windowsill. See below for tools and a .You can replace the sash in a double hung window for $ or hire a contractor for $, which includes labor and material. Enter your ZIP Code and adjust the .
Install the New Window. Clean the opening. Apply flashing tape to the sill. Check the sill for level and to make sure there s no bowing. Dry fit the new window into the opening. Apply a inch bead of silicone caulk at the interior head the top of the frame , the stops and the sill..