Siloed Specifications

One of the biggest challenges in construction documentation is the siloing of specifications. Since the 1980s, specialization has become more prevalent within architectural firms and among specification writers. As some professionals focus exclusively on particular specification sections, they often overlook adjacent divisions, leading to material and procedural conflicts across construction projects.

This practice can introduce inconsistencies—especially when design professionals rely on engineers, consultants, or manufacturers to provide specification language without conducting cross-references or verifying compatibility with other divisions. Master specifications or project specifications are then compiled with minimal cross-checking, allowing potential conflicts to slip through unnoticed.

Common Conflicts: Curing Methods vs. Liquid Flooring Treatments

Perhaps the most frequently encountered specification conflict appears in Division 3, Section 033000, which covers cast-in-place concrete. This section often includes both liquid flooring treatments and concrete curing methods in close succession (MasterFormat 033300). The assumption is that contractors will select the appropriate curing method based on the intended use of the concrete. Unfortunately, in practice, contractors often default to the least costly curing method without regard for long-term durability, which may not align with the structure’s intended performance requirements.

The listing of curing and flooring treatment options alphabetically or numerically without clear guidelines further compounds the problem. For instance, a spec may list topical sealers, penetrating sealers, hardeners, densifiers, and repellents in sequence, even though each product has different surface requirements. Similarly, curing options might be listed in an order that doesn’t reflect their effectiveness—water curing, ASTM C309 membrane-forming compounds, and ASTM C1315 curing and sealing compounds are all presented without hierarchy.

The Incompatibility of Curing Compounds and Flooring Treatments

When specification writers leave all curing options in place, they inadvertently permit contractors to choose any listed method, assuming they’re all compatible. However, not all curing methods achieve the same results, and liquid flooring treatments do not all interact equally with cured surfaces.

For instance, ASTM C309 products, while affordable and easy to apply, form a film or membrane over the concrete. This can block subsequent treatments from penetrating, such as densifiers or sealers intended to improve floor durability. Imagine concrete as an absorbent surface—like a paper towel—designed to soak up materials. If you cover it with a plastic film (as ASTM C309 products do), liquids intended to penetrate the surface are blocked.

Why ASTM C309 and ASTM C1315 Are Not Equivalent to Water Cure

A major misconception is that ASTM C309 and ASTM C1315 curing compounds can substitute for water curing. ASTM C309 and ASTM C1315 products form a membrane on the concrete surface but have only been for moisture retention at 3 days. By contrast, structural specifications often require a minimum of seven days of wet curing for optimal strength and durability. If ASTM C309 or ASTM C1315 products remain in the specification, contractors may mistakenly select them even when a longer curing period is essential, compromising concrete quality and longevity.

Additionally, the membrane formed by ASTM C309 and ASTM C1315 products can obstruct the penetration of liquid flooring treatments like hardeners or sealers, which need direct contact with the concrete. Allowing these products within the same specification section creates a conflict that leads to change orders, delays, and additional labor to resolve issues that could have been avoided.

Solutions to Avoid Specification Conflicts

To prevent these conflicts, it’s essential to streamline specifications by excluding curing methods that don’t meet the project’s concrete performance criteria. For example, ASTM C309 and ASTM C1315 should be omitted from all structural concrete specifications in favor of water curing or Water Cure Equivalent (WCE) methods. Acceptable curing methods might include potable water flooding, moisture-retaining blankets, and curing agents proven to replicate water curing effects.

Verification of curing agents should involve ASTM tests such as ASTM C39, ASTM C666, ASTM C672, ASTM C944, and AASHTO T277 to confirm their equivalency in duration based on the water-to-cement ratio. Only by specifying curing agents tested side-by-side on concrete cylinders for up to 28 days can we ensure consistent, reliable concrete performance.

Summary: Enhancing Compatibility in Specifications

Concrete is the most widely used building material globally, with a linear life cycle that requires respect for each phase: plastic, curing, and hardened. Neglecting proper curing will inevitably lead to problems like low compressive strength, surface scaling, high permeability, and premature wear. Addressing these challenges at the specification level can prevent unnecessary repairs, delays, and long-term structural issues.

For architects and engineers looking to improve specification compatibility and avoid these conflicts, contact SINAK for a complimentary specification review. Our expertise can help ensure materials and methods align with project requirements, preventing issues before they arise.