You need to know the basics to save money and time on your window replacement project. It does not matter if you’re going to hire a professional to help you or if you’re going to do it yourself.  

Note that installing new windows is often identical for all types of windows. This includes bay windows, casement windows, and double-hung windows.  

So, if you’re planning to get windows installed by window installation near me professionals, here are a few things you need to consider. 

Always Verify the Measurements 

Have you heard of the phrase “cut once, measure twice”? Well, this phrase applies to your window replacement project. This is particularly true if you want improved energy efficiency and proper installation. 

Before installing your windows, you have to measure both the new window and the old window to evaluate for any discrepancies.  

Correct measurements are always part of the window installation process. In addition, precise measurements are essential if you don’t want to install your windows improperly. If you do, you’ll end up with less energy-efficient windows.  

Getting Rid of the Old Window 

When removing the old window from the wall, ensure you protect the wall and any moldings or facings. Doing so will help you reuse them when you install the new windows.  

In general, a lot of experts recommend changing the window frame at the same time you’re replacing the old window. The reason for this is that old frames are often not weathertight. In addition, they might result in leaky windows and water damage. 

Furthermore, old frames might enable moisture and air to pass between your house and the outdoors. This results in increased air conditioning or heating expenses and structural damage from rotting wood. 

Evaluate the Opening 

After getting rid of the old window and its frame, you next must evaluate the opening to guarantee there are no damages. If you notice at least a minor damage, you must fix it before installing the new windows.  

Poor window installation can be the direct result of ignoring structural damages. 

Consider the Positioning 

Always verify the new window’s correct fit to prevent the wrong installation. You can do this by placing the new window into the frame and positioning it so that the glass is as close to the exterior of the opening as possible.  

Proper positioning lowers the possibility of condensation and thermal transfer. In addition, you can also prevent drafty windows.  


You will need to utilize high-quality shims to guarantee that the window sits completely level inside the frame. You will also need to use a level to verify if the window corners are at a perfect 90-degree angle.  

After you position the window correctly, use screws and pilot holes to secure the window into the frame. 


You will also have to place insulation around the frame if you want to improve the airtightness of your new window. You can purchase different insulation products on the market. All of them are created to prevent drafts and leaks. Don’t forget this step when installing new windows