ENGLISH
–22–
Width "X" = inside model width plus twice the thickness of framing material used.
With "Y" = inside model height plus twice the thickness of framing material used.
4. Build a wooden frame with the inside dimensions of your model as listed above.
(Remember to measure twice, cut once!) Frame depth should be the same as the
thickness of the wall. Fill in the space from the opening to the studs with wood
spacers as shown.
5. Nail frame to spacers, ensuring that the front of the spacers is flush with the drywall
(Fig. AC)
NOTE: If wall thickness is equal to or greater than 8 ½”, add aluminum flashing over
bottom of frame opening to ensure no water can enter area between inner and outer
walls. See Fig. AD
Y
X
Inside
Frame
Height
Inside
Frame
Width
Up to
6 ½”
Y: Inside Frame Height: 15⅜ " (39cm)
X: Inside Frame Width: 22⅝" (57.5cm)
Fig. AC
Nail Spacers
To Studs
Level
Fig. AD
Over
8 ½”
Caulk
Requir
ed
Aluminum Flashing Over
Bottom of Frame