Their duties and responsibilities include:

1. Measuring and marking the area where the door and window will be installed or replace

2. Removing old door and windows and any debris from the installation site

3. Inspecting and preparing the door and window installation site to ensure it is ready for the new window

4. Checking the installation for any issues and making necessary adjustment

5. Providing clients with advice on window maintenance and handling any client concerns or complaints

6. Ordering supplies and ensuring that all necessary materials are available for each job

. Using hand and power tools to fit and install the new window