Measure the length of the window frame to evaluate the amount of lumber required for the production. A standard wall is almost 8’ so that means you exterior wall must be at least twice as the standard wall divided by eight. You would need the lumber equal to the four times of the amount calculated before. So, this step has helped you calculate the amount of lumber required for the window.
Place a mark at the point of 16’ from the top and bottom plate’s marker of the tape measure. Remember, both sides should be even.
At the bottom plate of the window, you need to attach the stud so that it doesn’t fall down. The marked spot will guide you throughout so don’t worry about the direction. You can use studs of 16 penny nails of 2” screws and make sure they go through the plate and fix in the wall otherwise the damage will be inevitable if not enough care is taken. Same phenomenon should be applied to the other end stud. A squared eight by eight window should be in front of you with top and bottom plates fixed carefully.
Cut the window frame as per the measurement made in the prior steps. Install the frame when it is ready.
The frame of the wall should be connected to the floor and must be parallel with the exterior wall for precautionary measures.