Direct Answer
If your Secondary Water Resistance (SWR) system is not installed correctly, it may fail to provide the additional protection intended to reduce water intrusion when strong winds damage or remove the primary roof covering. Incorrect installation can also affect whether the feature qualifies for wind mitigation documentation and related insurance credits.
In Florida, SWR is also called a sealed roof deck. It provides a secondary layer of protection against water entering through the roof deck if shingles or another primary roof covering are damaged during a storm.
If you suspect your SWR was installed incorrectly, do not assume that the roof is protected simply because the contractor installed underlayment or another waterproofing product. Have a qualified roofing professional evaluate the installation, document any deficiencies, and determine whether corrective work is necessary. If you are seeking an insurance wind mitigation credit, ask your insurer or agent what evidence is required to verify the feature.
The Citizens Property Insurance Corporation Wind Mitigation Feature Documentation Guidelines identify documentation such as paid invoices, contracts, and photographs showing SWR installation as evidence that may support verification of this feature.
Who This Applies To
- Florida homeowners and residential property owners
- Owners of eligible residential condominium units or buildings, subject to the applicable insurance requirements
- Property owners who recently replaced their roof
- Owners who suspect that roofing underlayment or a sealed roof deck was installed incorrectly
- Property owners seeking wind mitigation insurance credits
- Property managers coordinating roof inspections and repairs
Not for: This guidance does not establish whether a particular installation complies with the Florida Building Code or qualifies for an insurance credit. Requirements depend on the building, roof assembly, applicable code edition, policy, and insurer.
1. Understand What SWR Is Supposed to Do
Secondary Water Resistance is intended to provide additional protection against water intrusion if the primary roof covering is damaged or lost during a windstorm.
Depending on the roof assembly and applicable requirements, qualifying methods may include:
- Self-adhering polymer-modified bitumen underlayment applied directly to the roof deck
- Approved tape applied over roof-deck seams in conjunction with an appropriate underlayment system
- Qualifying double-layer underlayment systems
- Other specifically recognized methods that meet the applicable inspection criteria
Not every underlayment qualifies as SWR. For example, the current Citizens wind mitigation guidance distinguishes qualifying sealed-roof-deck methods from standard underlayments that do not meet the SWR criteria.
Review the Citizens Wind Loss Mitigation Guide, revised April 2026, for the current criteria used to document sealed roof decks on applicable residential inspections.
2. What Can Happen if SWR Is Installed Incorrectly?
The consequences depend on the type and severity of the installation defect.
| Potential Problem | Possible Consequence |
|---|---|
| Underlayment does not adhere properly | The intended secondary water barrier may not perform as designed. |
| Roof-deck seams are not treated as required | Water may have additional pathways into the building if the primary roof covering is damaged. |
| Incorrect or incompatible materials are used | The assembly may not meet the applicable technical or inspection requirements. |
| Required coverage is incomplete | Some roof areas may lack the intended secondary protection. |
| Installation cannot be verified | The inspector or insurer may be unable to confirm that SWR qualifies for documentation or an insurance credit. |
| Installation records are missing | Additional inspection or supporting evidence may be needed to establish that the feature exists. |
Incorrect installation does not automatically mean that the entire roof must be replaced. A qualified professional must determine the extent of the deficiency and whether it can be corrected without replacing the full roof assembly.
3. Your Roof May Not Qualify for an SWR Insurance Credit
One possible consequence is that the inspector cannot verify the presence of a qualifying SWR system.
Florida wind mitigation inspections document specific construction features. An insurer may require sufficient evidence that the claimed feature exists and meets the applicable criteria before applying a related credit.
Citizens explains that SWR documentation may include:
- Paid invoices or contracts showing SWR was installed during reroofing
- Photographs showing the SWR installation process
- Other acceptable documentation that verifies the feature
Read the official Wind Mitigation Feature Documentation Guidelines to understand the supporting evidence Citizens identifies for secondary water resistance.
Important: An installation problem does not automatically cancel every wind mitigation credit on a property. The effect depends on which feature is affected and how the insurer evaluates the inspection and supporting documentation.
4. Your Roof May Be More Vulnerable During a Hurricane
If the primary roof covering is damaged during a hurricane, a properly installed secondary water barrier can help limit water intrusion through the roof deck.
If the SWR system is incomplete or incorrectly installed, that additional protection may be reduced or unavailable in the affected areas.
Potential consequences of water intrusion include:
- Damage to ceilings and interior finishes
- Wet insulation
- Damage to electrical equipment and building contents
- Moisture-related deterioration
- Business interruption or displacement
- Additional repair costs after a storm
Actual performance depends on the roof assembly, the extent of damage, storm conditions, and the specific installation deficiencies. SWR is a secondary protective measure, not a guarantee that a building will remain watertight during a hurricane.
5. Have a Qualified Roofing Professional Inspect the Installation
If you suspect improper installation, arrange an inspection by a qualified roofing professional who understands your roof system and the applicable installation requirements.
The inspection should determine:
- Which SWR method was intended to be installed
- Whether the materials match the specified system
- Whether the installation appears consistent with the manufacturer’s instructions
- Whether roof-deck seams and required areas received the specified treatment
- Whether the underlayment is damaged, detached, or incomplete
- Whether corrective work is necessary
- Whether the existing installation can be documented adequately
For an existing roof, the SWR layer may be concealed beneath the roof covering. Verification may therefore require photographs taken during installation, permits, invoices, product information, or other reliable records. If visual verification is not possible, the inspector should explain what evidence is available and what additional investigation may be appropriate.
6. Review the Original Roofing Documents
Before authorizing extensive repairs, collect the records from the original roofing project.
Look for:
- The signed roofing contract
- The detailed scope of work
- Product names and specifications
- Manufacturer installation instructions
- Invoices and proof of payment
- Roofing permits and final inspection records
- Photographs taken before the primary roof covering was installed
- Contractor warranties
- Any previous wind mitigation inspection report
These records may help establish which system was installed and whether it was intended to qualify as SWR.
Citizens also recommends providing inspectors with documents that identify and verify mitigation features. See its official Wind Inspection guidance.
7. Determine Whether Corrective Work Is Necessary
Once the installation has been evaluated, the roofing professional should explain the deficiency and recommend a suitable correction.
Depending on the findings, possible actions may include:
- Correcting a localized installation defect where accessible
- Replacing damaged or improperly installed components
- Providing additional supporting documentation when the installation is compliant but was not adequately documented
- Removing and reinstalling affected roofing materials when necessary to access the deficient layer
- Undertaking more extensive roof work if the defect cannot otherwise be corrected appropriately
Do not assume that applying a surface sealant over the completed roof will correct a defect in an underlying SWR system. The appropriate repair depends on where the defect exists and how the roof assembly was designed.
Ask the contractor to document the recommended scope, the reason for the repair, and the evidence that will be provided when the work is complete.
8. Check the Applicable Building Code and Permit Requirements
Roofing requirements can vary according to the building type, roof covering, location, permit date, and applicable edition of the Florida Building Code.
For example, Florida’s code provisions for existing buildings address secondary water barriers during certain roof-covering replacement projects. However, the exact requirements and exceptions must be checked against the code applicable to the specific project.
Consult the official Florida Building Commission website for building-code resources. Your roofing contractor or local building department can help establish which requirements apply.
Do not rely on an older online article or a generic SWR checklist to determine whether your particular installation complies with current requirements.
9. Arrange a Follow-Up Inspection if Needed
After corrective work, ask the roofing professional whether a follow-up inspection or updated wind mitigation form is appropriate.
The supporting documentation should clearly identify:
- The original concern
- The location and extent of the deficiency
- The corrective work performed
- The materials used
- Photographs of the completed work, where available
- Relevant invoices and permit records
- Any limitations on what could be verified
The inspector should document only what can be supported by the inspection and available evidence. A corrected installation should not be represented as compliant until the relevant requirements have been verified.
10. Contact Your Insurance Agent
If your concern relates to an insurance discount or underwriting requirement, contact your insurance agent before assuming that a repair or updated inspection will change your premium.
Ask:
- Does the existing policy recognize the SWR feature?
- What documentation is required to verify it?
- Will a new inspection or updated form be necessary?
- Could the correction affect a previously documented mitigation credit?
- When could any approved change take effect?
Citizens explains that the effective date for wind mitigation credits can depend on whether a feature is inherent to the original construction or was added later. For improvements made after construction, the certification date and supporting documentation can matter. See its official guidance on determining effective dates for wind mitigation credits.
Do not assume that a corrected SWR installation automatically results in a particular discount or retroactive premium adjustment. The insurer must evaluate the applicable documentation and policy rules.
11. Keep the Corrective-Action Records
Once the installation has been assessed or corrected, retain the documentation with your permanent roof records.
Keep:
- Original roofing contract
- Original installation photographs
- Product specifications
- Permits and inspection records
- Professional assessment
- Corrective-work invoices
- After photographs
- Updated wind mitigation documentation
- Correspondence with your insurance agent
These records can help support future roof inspections, insurance renewals, property transactions, and questions about the roof’s construction history.
Bottom Line
If your SWR is not installed correctly, the system may not provide its intended secondary protection against water intrusion, and you may be unable to verify it for wind mitigation purposes. The correct response is to document the issue, have a qualified roofing professional assess the installation, correct any deficiencies, and obtain the evidence required by your insurer.
Do not assume that every installation problem requires a complete roof replacement or that every problem automatically removes an insurance credit. The actual consequences depend on the deficiency, the roof assembly, the applicable code and inspection criteria, and your insurer’s requirements.
Related Questions
- How does a Florida wind mitigation inspection work?
- What documentation can verify secondary water resistance?
- When can a wind mitigation credit take effect?
Sources
- Citizens Property Insurance Corporation — Wind Loss Mitigation Guide, revised April 2026
- Citizens — Wind Mitigation Feature Documentation Guidelines
- Citizens — Your Wind Inspection
- Citizens — Determining Effective Dates for Wind Mitigation Credits
- Florida Building Commission — Building Code Resources
Last reviewed: October 2026
Related Resources
What Documentation Should I Keep for My Commercial Roof Warranty?
Need Roofing Help?
ShieldLine Roofing can help property owners evaluate roof-condition concerns, review roofing documentation, and coordinate appropriate corrective work. Confirm the applicable inspection and insurance requirements before proceeding.
Disclaimer: This information is provided for general educational purposes and is not insurance, legal, engineering, or building-code advice. Requirements vary by roof system, property, jurisdiction, and insurer. Consult a qualified roofing professional, the relevant building department, and your insurance agent for guidance specific to your property.
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