Above Sheathing Ventilation – Spacer Shim

ATAS International offers a new, patented, ASV/TB Spacer Shim. Above-Sheathing Ventilation (ASV/TB) is achieved by having continuous air flow between the roof sheathing or wall assembly and the metal panel system. ASV/TB creates energy savings by reducing air-conditioning costs in the summer and adding insulation value during the winter as proven by studies and testing performance sponsored by Metal Construction Association (MCA) at Oakridge National Lab. ASV also minimizes the effect of condensation between the roof layers and wall assemblies.

ASV/TB Spacer Shims are designed to be stackable, and will provide ventilation spaces in increments of ⅜” up to 1⅛”.

Line Drawing
Product Info
ASV/TB Spacer Shim | Single Shim

⅜” air space

ASV/TB Spacer Shim | Double-Stacked

¾” air space

CAD Details

Details provided allow for typical expansion and contraction values of the metal cladding materials as provided by ATAS International, Inc only. Allowance must be made for additional sub-structure movement based upon materials used and overall project design.

DWG File Format - Dutch Seam Roof Example

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ATAS Expands its Portfolio with Metalwërks Architectural Plate Systems

On Tuesday, March 18, 2025, ATAS International, Inc., a recognized leader in the metal panel industry, expanded its portfolio by acquiring the assets of Metal Sales & Service, Inc., including the Metalwërks® line of architectural metal plate systems. Metalwërks is recognized industry-wide for high performance metal plate exterior facade systems, integrated curtain wall components, and custom architectural features, including column covers and engineered screen wall systems. They have offices in Kennett Square, PA and manufacturing in Elkton, MD.