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k o l b e

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ltra

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oubl e

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Ultra Pocket Double Hung Measuring Guide

Determining if the Ultra Pocket Double Hung is Right for You:

Check the existing frame for any signs of damaged or rotted wood. Repair or replace any

damaged or rotted wood on the frame. Next, measure horizontally between the blindstop and

the interior stop

(Figure 1)

to determine the jamb depth. If the damage cannot be repaired or

the jamb depth is less than 3-1/4", the Ultra pocket double hung will not work for you.

A new unit with full frame replacement will have to be used instead.

Dimension

“A”

Figure 2 - Interior View

Measure existing frame diagonally to check squareness.

Figure 3 - Interior View

Measure existing frame horizontally to determine width.

1. Check the opening for squareness. Measure

diagonally from corner to corner, repeat for

remaining corners

(Figure 2)

. Measurements

should be within 1/4" of each other. If the

measurements are not similar, you will have

to downsize the new unit accordingly in order

to square the new unit in the existing frame.

2. Raise or remove the sash to take the

measurements. You may also need to remove

the jambliners if the side jambs are not visible

(Figure 1a)

.

3. To determine the width of the new window,

measure from side jamb to side jamb. Measure

across the top, middle and bottom to find

the smallest dimension

(Figure 3)

. The smallest

measurement will be dimension “A”.

4. For the height of the new window measure twice

from the head jamb

(top of frame)

to the sill

(bottom)

to

get dimension “B” and “C”

(Figure 1)

. Take three

measurements - one at each side and one in the middle.

5. Measure horizontally between the blindstop and the

interior stop to get Dimension “D”

(Figure 1)

.

6. Record dimension “A”

(width)

, dimension “B”

(height),

dimension “C”

(height)

and dimension “D”

(width)

for

each window in the chart on the following page.

Note: Kolbe will subtract 1/2" from the width and 1/4" from the height to obtain the actual size of the unit to be built.

This is to make sure that the new unit will fit within the existing opening.

Things To Remember:

Record measurements and round down to the nearest 1/8".

Measure each window, even if they appear to be the same size.

Measuring the Opening:

Figure 1 - Cross Section Detail

Figure 3

Interior

Dimension

“B”

Dimension

“C”

Stool

Exterior

Sill

Head Jamb

3-1/4" jamb depth

Blindstop

Interior

Stop

Dimension

“D”

Jambliner

Side

Jamb

Figure 1a - Top View

Exterior

Trim

Blindstop

Interior

Stop

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