Roof Glass Repair Guidelines

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The criteria to determine if roof glass is repairable or if the roof glass must be replaced are based on both the severity and the location of the damage. If allowed, the repair process will remove air from the damaged area, either by vacuum or displacement, and fill the break with resin. See "Common Damage Types " for description of commonly occurring types of damage, and use the images and information below to determine if the roof glass may be repaired or if replacement is required.

Courtesy of TESLA, INC.

Windshield Area	Allowed Repairs
Area 1 (shown in red in the images above) No repairs are allowed in area 1, which includes: Within 50 mm of the front and rear edges of the roof glass. Within 274 mm of the LH and RH edges of the roof glass.	Repairs allowed in area 1: None; if the roof glass is damaged in this area, it must be replaced.
Area 2 (shown in green in the images above)	Repairs allowed in area 2: Cracks shorter than 50 mm in the exterior layer of glass. Chips less than 50 mm wide in the exterior layer of glass. CAUTION: If there is damage to the inner layer of glass, the roof glass is not repairable, and it must be replaced. No other repairs are allowed. If the roof glass is damaged more than described above, it must be replaced. CAUTION: A maximum of three repairs of any kind may be performed on any roof glass panel. If a fourth repair is required, the roof glass must be replaced.

Windshield Area

Allowed Repairs

Area 1 (shown in red in the images above)

No repairs are allowed in area 1, which includes:

Within 50 mm of the front and rear edges of the roof glass.
Within 274 mm of the LH and RH edges of the roof glass.

Repairs allowed in area 1:
None; if the roof glass is damaged in this area, it must be replaced.

Area 2 (shown in green in the images above)

Repairs allowed in area 2:

Cracks shorter than 50 mm in the exterior layer of glass.
Chips less than 50 mm wide in the exterior layer of glass.

CAUTION: If there is damage to the inner layer of glass, the roof glass is not repairable, and it must be replaced.

No other repairs are allowed. If the roof glass is damaged more than described above, it must be replaced.

CAUTION: A maximum of three repairs of any kind may be performed on any roof glass panel. If a fourth repair is required, the roof glass must be replaced.