Retrofit Installation

AVW's most common method — new unit into existing frame, moisture barrier preserved.

When to Use This

When the existing frame is sound and the job calls for retrofit per the work order.

Tools & Materials

1. Reciprocating saw / demo tools
2. Level
3. Shim stock (flat trim)
4. Screws
5. Sealant / back-bead
6. Beauty bead supplies
7. Trim fin material (when required)
8. [YOUR INPUT]

Steps

1. Complete site prep and verify measurements (see Before the Job).
2. Remove existing sash and meeting rail — leave frame intact.
3. Check opening: level, plumb, flush on all four planes.
4. Trim or grind excess frame material if needed — preserve sealant barrier.
5. Apply back-bead sealant around the opening.
6. Set unit with laminated flat trim shims on bottom — not wood.
7. Secure to framing with screws per AVW method.
8. Apply beauty bead between fin and exterior stucco.
9. Complete interior finish (see Interior Finish).
10. [YOUR INPUT] — Additional retrofit steps.

When to Trim Fins

Trim fins are required on retrofit when the exterior is not flush stucco or the existing frame is a pop-out frame.

• Not flush stucco — trim fins are required.
• Pop-out frame — trim fins are required.
• Flush stucco, standard frame — trim fins are typically not required. Confirm on site if unsure.
• [YOUR INPUT] — Additional trim fin conditions.

Discretion

Some retrofit conditions call for crew judgment on site. When in doubt, check this section first, then call Tom (Production Manager).

• Whether trim fins are needed based on stucco profile and frame type.
• How much existing frame material to trim or grind while preserving the moisture barrier.
• [YOUR INPUT] — Other on-site judgment calls.

Quality Standard

Unit sits level and plumb. Sealant continuous. Frame concealed cleanly inside and out.

Common Mistakes

• Wood shims on the bottom.
• Demo before measuring.
• Breaking the moisture barrier unnecessarily.