The first step is to measure your vanity mirror length and width.
How to frame a bathroom mirror on the wall.
Once your frame dimensions are known cut the four sides 1 longer than that final size.
A bathroom mirror doesn t have to be just for function adding a frame adds to the interior style and theme of the bathroom and hides those cheap looking mirror clips especially the plastic ones.
Starting with the bottom piece apply liquid nails to the back of the board avoiding the edge closest to the mirror.
Home gym mirrors extremely functional to this type of space and as you see in this post the added wood frame helps to warm and complete the space.
For example say your mirror is 64 long and you chose a 4 square block for the corners.
Make cuts for all four sides.
Press onto the mirror or wall and use a level to make sure the frame is.
How to frame a mirror.
In order for the frame to mount flush against the wall a notch must be cut into the backside of the frame pieces.
Using your miter saw cut your wood at a 45 degree angle so the outside portion of your wood piece will be the full length of the mirror see pic above.
Measure the thickness of the mirror and the bottom track if any.