SIRS explained: what a Florida structural integrity reserve study actually contains

A Structural Integrity Reserve Study — SIRS — is a reserve analysis with a structural component assessment built in. The formal definition is in the glossary. In plain terms: a licensed engineer or architect examines specific structural and waterproofing components of the building, estimates how long each component has before it needs replacement, and calculates how much money the association should be setting aside each year to cover those replacements when they come due.

1. Which buildings need a SIRS

The SIRS requirement applies to residential condominium buildings that are three or more stories tall. Single-family homes and buildings with four or fewer dwelling units are excluded from the requirement, as are certain non-residential structures. The threshold is stories, not units — a building could have a large number of units on three floors and still qualify.

Boards of buildings that fall just under the three-story threshold should not assume they are permanently exempt. Additions, renovations, or reclassifications of floor use can affect how a building is measured. When the building's story count is genuinely ambiguous, the question is worth confirming with the local building official.

2. What components a SIRS covers

The SIRS is not a full building inspection — it focuses on structural and waterproofing systems whose failure would affect the stability or habitability of the building. The components a SIRS evaluates typically include:

• Roof system — the roofing membrane, insulation, drainage, and penetration sealing, evaluated for remaining waterproofing performance and structural load capacity.
• Exterior walls and cladding — stucco, concrete, masonry, or panel systems that form the building's weather envelope, evaluated for cracking, spalling, delamination, and water infiltration.
• Windows and glazing systems — where integrated into the structural or waterproofing system, including balcony sliding door assemblies in older construction.
• Primary structural members — columns, beams, load-bearing walls, and post-tensioned slabs that carry the building's gravity and lateral loads.
• Foundation — where accessible, the condition of footings and grade beams, particularly in coastal buildings on pilings or in areas with high groundwater.
• Balcony and deck assemblies — railings, waterproofing membranes, structural connections, and drainage, which have been the subject of significant post-Surfside scrutiny.
• Plumbing and electrical systems — in some SIRS frameworks, major shared infrastructure components with long replacement cycles are included, particularly where failure would affect structural systems.

For each component, the SIRS provides an estimated remaining useful life and a projected replacement cost. These two figures drive the reserve contribution calculation.

3. What it costs and who pays

The cost of a SIRS varies based on building size, age, complexity, and the scope of investigation required. For smaller mid-rise buildings, structural SIRS engagements often run in a range of several thousand dollars. For large oceanfront high-rises with complex systems and difficult access, the cost can reach five figures. Boards should treat SIRS preparation as a professional engineering fee, not a commodity purchase — the credentials and methodology of the preparer matter as much as the price.

The cost is paid by the association and is an operating expense. The reserve contributions that result from the SIRS flow into the reserve fund under the budget framework set by §718.112(2)(g). Under post-2024 Florida law, structural reserves identified in the SIRS cannot be waived by owner vote. This is a significant change from prior law, which allowed owners to vote to reduce or waive reserve funding. The non-waivable requirement applies specifically to the structural and waterproofing components covered by the SIRS.

The practical consequence is that the SIRS drives a binding reserve contribution line item in the budget. Associations that previously waived reserves and are now required to fund them may see meaningful increases in the operating budget in the fiscal year the SIRS first applies.

4. How a SIRS interacts with the milestone inspection

The SIRS and the milestone inspection under §553.899 are different instruments with overlapping scope. They are often confused, and the confusion has real consequences.

The milestone inspection is a point-in-time structural assessment performed by a licensed professional, required at the 30-year (or 25-year coastal) mark and every ten years thereafter. It produces a report that goes to the local building official and to unit owners. The SIRS is a funding analysis — it uses the condition data from structural assessments (including milestone inspections) to project reserve needs.

When a milestone inspection finds deterioration, the SIRS should be updated to reflect the revised remaining-life estimates for affected components. A SIRS prepared before a milestone inspection may show longer remaining-life estimates for components the inspection later finds to be in worse condition. Boards should reconcile the two documents any time a new milestone inspection is completed.

The milestone inspection checklist walks through the board's implementation steps for the inspection itself.

5. A worked example

Hypothetical, for illustration only.

Consider a 1985 eighteen-unit mid-rise on the oceanfront in coastal Broward County. Three stories. Certificate of occupancy issued in 1985. Milestone inspection due no later than the 25-year mark given coastal proximity — but let us assume the board is now commissioning a SIRS in 2026 following the post-HB 1021 requirements.

The engineer visits and documents the following:

Roof system: The original built-up roofing was replaced in 2011 with a modified bitumen system. At 15 years, it is approaching the end of its typical 15-to-20-year service life. The engineer estimates four to six years of remaining performance under normal maintenance, and assigns a replacement cost for the full 8,000-square-foot roof area.

Exterior stucco and waterproofing: Cracking is visible at the expansion joints on the south elevation. The engineer finds no structural compromise but recommends remediation within three years. Partial re-waterproofing of the south elevation goes into the SIRS as a near-term line item.

Primary structural members: A visual assessment of the ground-floor columns and second-floor slab soffit shows surface spalling at two locations near the building's southeast corner. The engineer flags these for further investigation in Phase 2 of a milestone inspection — the SIRS cannot assign a remaining useful life to members that need engineering review. A placeholder is entered in the SIRS with a note that the figure will be updated after Phase 2.

Balconies: All six balconies on the south exposure show evidence of past deck coating repairs. The waterproofing is intact, but the engineer estimates the deck coating will require replacement within seven years. That projected cost goes into the SIRS reserve schedule.

The resulting SIRS reserve schedule shows four active line items with different timing and replacement cost estimates. The association's reserve contribution for the upcoming fiscal year increases meaningfully over the prior year, particularly for the roof and balcony line items. The board adopts the contribution as required — the structural line items are not eligible for a waiver vote.

The Phase 2 structural review happens after the SIRS is filed. When Phase 2 is complete, the engineer updates the reserve estimates for the two flagged columns, and the SIRS is revised before the next budget cycle.

Closing

The compliance calendar tracks the key SIRS and milestone inspection deadlines by fiscal year. The §718.112(2)(g) statute reference covers the reserve-study and budget-adoption obligations in full.

This post is operational guidance written from a software-management perspective. It is not legal advice. Boards with specific questions about SIRS requirements, reserve-waiver restrictions, or their building's compliance status should consult qualified Florida counsel and a licensed engineer or architect.