What CSI Section governs Venetian plaster specifications?

CSI MasterFormat Section 09 94 00 (Decorative Finishes) or Section 09 25 13 (Lime Plastering).

Why is Level 5 drywall prep required for lime plaster?

Because polished lime plasters are ultra-thin and reflective, any seam telegraphing, paper fuzz, or joint fastener indentation will be magnified under lighting.

Does Venetian plaster contribute to LEED certification?

Yes! Natural mineral lime plasters emit zero VOCs and contribute to LEED v4 Low-Emitting Materials and Indoor Air Quality credits.

What size mock-up board should be specified?

Specify a minimum 4ft x 4ft on-site mock-up board created by the actual job applicator to approve color, texture, and sheen.

← Back to Architectural Journal

AIA SPECIFICATIONS•January 20, 2026•11 min read

The Architect’s Guide to Specifying Artisan Venetian Plaster & Lime Finishes

Gian Carlo SagastiNovacolor Ambassador & Master Plasterer

Integrating bespoke Venetian plaster and lime finishes into commercial and residential construction projects requires clear specification writing under CSI MasterFormat Section 09 94 00 (Decorative Finishes) or 09 25 13 (Lime Plastering).

1. Substrate Specification (Level 5 Impermeability)

The most common point of failure on job sites is inadequate drywall preparation. Architects must explicitly specify:

Substrate Standard: Drywall finished to ASTM C840 Level 5 (skim coated smooth across all joints and paper face).

Substrate Flatness: Maximum 1/8-inch tolerance per 10 linear feet.

Keying Primer: Acrylic quartz mineral primer applied 24 hours prior to plaster basecoat.

2. On-Site Mock-Up Board Approvals (CSI Section 01 43 36)

Due to the organic, hand-troweled nature of Italian lime plasters, specifications should mandate a 4' x 4' physical mock-up panel completed on-site by the designated master applicator prior to full project execution. The mock-up panel serves as the binding quality standard for sheen level, color tint, texture variation, and wax protection.