Exterior and exposed sprayed fireproofing: verify the specified product and conditions
The material order for a mixed-use tower is ready to issue. The estimator used one sprayed product allowance for the concealed steel, parkade and loading dock. The foreman finds different specified products and needs to identify the mismatch before delivery.
Match each area to its specified product, applicable design and actual exposure conditions before pricing or spraying. Density labels alone do not establish exterior, moisture or impact suitability. A Canadian industrial-product example identifies particular exposure investigations and coating recommendations; those apply to that product and arrangement, not to every high-density spray.
Build an exposure and product schedule
- Identify the actual locations. Separate concealed steel, visible interiors, open edges, parkades, docks and other areas shown in the scope. Record conditions the designer expects during construction and service. Do not assign a product simply from the word 'parkade' or assume that temporary exposure is the same as long-term exposure.
- Compare the specified products. Check the specification, approved schedule and submittals for each area. Record the exact material and design reference rather than only standard, medium or high density. Where the estimate differs, identify the quantity and location assumptions without substituting a cheaper product into the technical schedule.
- Verify the exposure evidence. Ask the manufacturer and consultant how the proposed arrangement covers the actual environment and any construction-stage limits. Distinguish a product's exposure investigation from the complete project's acceptance. Do not infer a fire-resistance rating or weather suitability from a physical-property table or a promotional durability description.
- Check the whole protection arrangement. Confirm any required primer, topcoat, reinforcing or interface information for that actual system. The cited industrial product discusses compatible coatings and states that it is not itself an anticorrosive material. A denser fireproofing layer is not permission to omit another specified protective component.
- Reconcile installation and inspection plans. Have the qualified installer identify changes in equipment, application, finish and access under the selected instructions. Ask the agency to confirm the applicable checks and criteria. Avoid carrying a concealed-area method or test target into an exposed area without verifying its actual requirements.
- Resolve the order and scope record. Send the identified estimate or proposed-product mismatch through the project review process. Keep the commercial adjustment separate from technical approval. Update the location schedule and purchase information only after the required decisions, and check delivered material against the resolved records.
Common mistakes
- Using density as shorthand for weather approval.
- Assuming temporary construction exposure permits permanent exposure.
- Resolving an estimate gap by quietly changing the specified material.
Checklist
Keep an exposure comparison
- Location and construction/service conditions.
- Exact specified and proposed materials.
- Applicable design and exposure evidence.
- Required coatings and interfaces.
- Installer and agency requirement checks.
- Resolved technical and purchase records.
Check your understanding
A proposed product has a higher density than the specified one. Does that settle the loading dock substitution?
Show the answer
Verify the complete design and exposure requirements through the project's review process. Higher density alone does not establish the proposed arrangement's suitability or authorize the substitution.
