Use a level to make sure the window is straight.
How to install a new bathroom windows on existing wall.
Identify any stops on the existing window.
If there are large gaps at the wall or floor attach quarter round moulding along the wall or floor edge with finishing nails.
Place the window into the frame.
If you re installing from the inside remove the interior stops and leave the exterior stops in place.
Having fewer dirt catching corners and edges simplifies floor cleaning.
Place a fan in a nearby window and point it outward.
Interior stops parting stops between the two sashes and exterior stops.
Add two screws one in each corner to hold it in place.
The person inside should then shim between the window and the framing to keep the window in place image 1 image 2.
Add screws at the bottom to stabilize it.
Old wooden windows have stops holding the sashes in place.
Shims can be glued into place or tacked with a trim nail.
Flashing band should then be installed around the window on the outside.
If the holes are not completely lining up or you want a more secure install use wall anchors to attach the vanity to the wall.
The flashing should be nailed into place.
Check the level again before trimming the shims with a utility knife.
Use wood shims to balance it properly on the frame.
Then examine your studs.
Installing a state of the art residential wall hung toilet and sink.
Although this new bathroom is a bit smaller because of additional plumbing walls it appears larger.
Making a small 6 x 8 ft bathroom feel larger.