A commercial roofing project involves the removal of an existing Built-Up Roofing (BUR) system and installation of a new one. During the tear-off, the contractor discovers that the underlying roof deck is significantly deteriorated in several areas due to moisture damage. What is the most appropriate immediate action the contractor should take?
- AInstall a vapor barrier directly over the deteriorated deck to prevent further moisture ingress.
- BProceed with insulation installation, as the new BUR system will provide sufficient protection.
- CDocument the damage, notify the owner, and coordinate for repair or replacement of the deteriorated deck sections.
- DApply a liquid-applied waterproofing membrane directly over the deteriorated areas.
Show answer & explanationAnswer & explanation
Correct answer: C. Document the damage, notify the owner, and coordinate for repair or replacement of the deteriorated deck sections.
Discovering significant deck deterioration requires immediate action beyond just roofing. The contractor must document the unforeseen condition, inform the owner, and obtain approval for necessary repairs or replacement of the structural deck sections before proceeding with the new roofing system. Installing over a compromised deck would lead to premature failure.
Why the other options are wrong
- A. A vapor barrier helps with vapor diffusion, but it won't fix structural deterioration or prevent liquid water from a failed deck below from causing issues.
- B. Installing new roofing over a compromised deck is negligent and will lead to premature failure of the new system.
- D. Liquid-applied waterproofing might temporarily cover the issue but does not address the structural integrity of the deteriorated deck.
Roof Deck Deterioration Protocol
Upon discovery of unforeseen structural deterioration of a roof deck during renovation, the contractor must halt work in affected areas, document findings, notify the owner, and await instructions/approval for repair or replacement before proceeding.
- Unforeseen condition requiring immediate attention
- Impacts structural integrity and new roof performance
- Requires owner notification and approval for extra work
- Repair/replacement must occur before new roofing installation
Memory trick: For unexpected 'Damage', 'Document, Discuss, Decide' with the owner.