Type 1: inside Mount – NO Sill or Trim.

Measure inside the opening in 3 places. Enter the smallest width and height on the order form.

Type 2: Inside Mount – Sill, No Trim

Measure the width inside the opening in three places. Measure the height from the top of the sill to the inside top of the opening in 3 places. Enter the smallest width and height on the order form.

Type 3: Outside Mount - Sill and Trim

Measure the width from the outside edge of the window trim to the outside edge of the window trim. Measure the height from the top of the sill to the outside of the top trim in 3 places. Enter the largest width and height on the order form.

Type 4: Outside Mount - Trim, no Sill

Measure the width from the outside edge of the window trim to the outside edge of the window trim. Measure the height from edge of the bottom trim to the outside edge of the top trim in 3 places. Enter the largest width and height on the order form.