Exposed Surface / Exposure - Painting Architectural

Linetec defines an exposed surface/exposure as: 

• The surface area indicated on a material shape that requires finish  coverage, paint or anodize
  • Typically a surface area, which when assembled into  doors, windows, or other assemblies, is either viewable, or is in direct contact to environmental weathering.

Significance of exposed surface/exposure indications:

• When Linetec paints material, accurate exposed surfaces must be supplied for the following reasons:

o        Sales Order pricing, with few exceptions, is based on the total painted square footage.

o        Paint quantity requirements are based on the total painted square footage determined by Linetec.

o        Whenever possible, rack marks are kept to a minimum on exposed surfaces.

o        Rework and double-runs can be minimized when accurate exposures are provided, thus minimizing the impact on lead times.   

Square Footage

Square footage, in most cases, is calculated based on a shapes indicated exposed surfaces.

Calculation of Exposure

Painted exposure, per lineal foot, is calculated using the exposed surfaces indicated on the shape.

Inches of exposed surface area are summed, the sum then converted into square feet by dividing by twelve (12). 

• Exposed surface calculation may vary depending on the type of exposure, such as a single adjacent exposure on one profile, or multiple non-adjacent exposures on one profile.
• Exposed surface calculation may vary depending on the material profile or type.
• Exposure calculations are subject to established minimums.

Calculation of Square Footage (per piece)

Square footage is calculated by multiplying the exposure by the total lineal footage of the profile. 

·          Square footage calculation may vary depending on the material profile or type.

PRIMARY EXPOSURE

• Exposed exterior and interior surfaces that must withstand the effects of the environment and normal use/wear
• Primary surfaces must comply with all applicable AAMA specifications relative to dry film thickness, etc.

SECONDARY EXPOSURE

• Semi-exposed areas requiring paint coverage, but which are not exposed to the direct effects of the environment or use/wear.  This includes recessed channels or tracks.
• Semi-exposed areas requiring paint coverage, which does not have to be in compliance with AAMA specifications relative to dry film thickness, etc.
• Further criteria which Linetec applies to secondary exposed surfaces
  • Minor blemishes, runs, bubbles, etc, may be present, and will not be rejected or touched up.
  • Rack marks may be evident and will not be touched up.

MISCELLANEOUS

• Both Primary & Secondary exposed surfaces are subject to the Faraday Cage Effect.
• Material requiring 100% paint coverage will have rack marks. Contact our quoting department or your Inside Sales Representative to discuss racking options.
• Exposed surfaces that contain channels, recesses, or cavities may be subject to the “Faraday Cage Effect”.