Replacing an existing window is a fairly specialist job and best done with the assistance of a local window fitter in London. However, if you are a keen DIY-er, it may be a project that you would like to take on yourself to improve the appeal and value of your home.
As with most major home improvement projects, good preparation is the key to a successful conclusion, and we have divided our project advice on installing a replacement window into three parts to distinguish between the tasks that need to be performed before you remove your old window and the installation of the replacement window.
Part 3 Installing the Window
After measuring up and preparing the frame for your replacement window, it is time to complete the installation. The first stage for doing this is to caulk the exposed inner face of the exterior casing with a elastomeric caulk. You should also apply two continuous beads of caulk along the window sill.
Working from inside the room, place the bottom of the replacement window horizontally onto the sill and tip it upwards into the exposed casing. Fasten the window loosely in place with a few nails or screws into the side jamb and adjust the replacement window by inserting shims under the sill and behind the side jambs until it is perfectly centred and opens closes and locks smoothly.
When the window is square, secure it place by screwing through the predrilled holes made when preparing the frame – ideally with a shim behind each screw hole to avoid bowing the frame. You can screw through the shims and then cut then flush afterwards with a Stanley knife.
Starting from the outside, fill gaps around the window up to ¼ inch wide with elastomeric caulk (anything wider should first be filled with foam –allowed to dry and sanded flush) and finish up by replacing any stops you took away from the interior when removing the old window, and then prime and paint as required.
Any element of this three-part guide can be done by yourself, or you can use the services of a local window fitter in London for specific areas in which you could benefit from the experience of a professional London tradesman. You may also wish to review our Guide to Replacement Windows before you start or read how installing replacement windows can improve the appeal and value of your home.