CAI reserve-study component inventory and useful-life worksheet

What belongs in a CAI reserve-study component inventory?

Define each reserve entry as a project: replace roof section R1, renew an RTU cohort, or replace pavement section P1. CAI's July 2023 standards separate this physical analysis from the financial analysis that determines fund status and contributions.

CAI addresses community associations. This worksheet uses a commercial condominium association; a single-owner commercial property can use the same evidence discipline with its own ownership and lease allocations. For roof inspection and intervention selection, use roof asset management and capital planning before transferring the selected roof project into the whole-property reserve.

Start with responsibility and a dated scope

Attach the declaration, maintenance allocation, contract, or established association precedent supporting each responsibility decision. Roof ownership and equipment ownership can differ on the same building. Record the initial fiscal year, site-observation date, study service level, inaccessible areas, and whether installation dates come from acceptance records or owner recollection.

The association establishes responsibility from its documents, the preparer documents selection and estimates, and the preparer and client select the funding goal together; the board adopts the budget through its governing process. CAI 2023 does not constrain reserve component definitions to tax capitalization categories. S1

Check the entire property before pricing

Work through the responsibility schedule for roofs, walls and sealants, windows, doors, elevators, plumbing, electrical distribution, fire-protection equipment, site lighting, drainage, and amenities. Record included projects, operating items, and exclusions with reasons. Keep tenant improvements in their responsibility column. Connect each selected project to its quantity, life, cost, and funding records with a stable ID.

Does the project pass the reserve component test?

Under CAI's July 2023 Reserve Study Standards, a reserve component must be an association obligation with reasonably anticipated need and timing and a material, reasonably estimable total project cost. Older search results, including the Foundation's revised 2020 reserve report, describe a four-part test; use the July 2023 framework for this worksheet. S1; S11

CAI 2023 requires disclosure of the operating-budget dollar threshold but supplies no universal national cutoff. The $5,000 threshold below is an Anvilfield worksheet policy input, with documented exceptions for projects that materially extend useful or remaining life. Evaluate the whole project, including related costs, rather than splitting invoices below the threshold. CAI 2023, pp. 8-9 and 13

Only the first three rows enter the worked model; the other rows are separate eligibility decisions. The upgraded RTU project replaces H1 rather than adding to it. All dollar amounts are Anvilfield estimates or policy inputs.

A reserve component can be scheduled professional inspection, preventive maintenance, or one-time corrective work under CAI 2023. The annual filter invoice remains in operations under this selected threshold, while a material scheduled inspection qualifies when responsibility and timing are established. Eligibility does not make that inspection part of the reserve preparer's ordinary site visit. S1

Assign an owner and deadline to unresolved quantities, conditions, and costs; retain their project records until resolved.

How do you prove quantities and prevent double counting?

CAI 2023 requires component quantities or identifying descriptions, sources, useful life (UL), remaining useful life (RUL), and current replacement cost in the inventory. Add location, measurement method, observation date, confidence, and estimate scope so another estimator can reproduce the entry. Identify source sheet, revision, and field reconciliation. When drawings and field conditions disagree, retain both quantities and resolve scope with dated measurements or equipment records; do not average conflicting evidence. CAI 2023, p. 11

Quantity evidence register

Separate horizontal roof footprint from measured roof surface and the assembly being priced. For pavement, subtract islands and excluded concrete from the replacement polygon, then define removal depth, pavement section, and base-repair allowances. Use pavement condition assessment and PCI to establish distress and treatment scope; an area alone does not distinguish an overlay from full replacement.

Reconcile equipment to model/serial records; split the RTU cohort when age, condition, responsibility, or replacement timing differs.

Design drawings are evidence to reconcile with observed conditions. Under CAI 2023, a Level II update reviews general conformance of existing quantities without requiring every quantity to be re-established. Record inaccessible areas and discrepancies with an action owner and due date. CAI 2023, p. 5

Carry one complete component worksheet into the funding model

The worksheet uses Anvilfield estimates except the labeled HUD useful-life inputs. Link its cost and quantity cells to supporting records by project ID, following the separation of component and alternative records in HUD CNA e-Tool v3.2 Components & Alternatives, November 2023 and the structured input workflow in HUD User Guide v8, August 2026. HUD program categories and CAI eligibility serve different purposes.

Retain installation and observation dates, condition, performed maintenance, life source/edition, RUL rationale, review trigger, price date, shared-cost allocation, and recurrence. Use statuses: funded, long-life, operating, excluded with reason, or unresolved with an assigned action. After replacement, keep the ID, record acceptance, and reset the cycle.

Useful life, remaining life, and warranty are different fields

CAI's July 2023 Reserve Study Standards define remaining useful life as estimated functional service remaining and assign zero remaining life to projects expected in the initial year; warranty expiration is a separate contractual date. Useful life assumes proper construction and preventive maintenance, while effective age is useful life minus remaining useful life. Effective age need not equal calendar age. CAI 2023, pp. 16-20

For an initial fiscal year of 2027, RUL zero places work in 2027, RUL 1 in 2028, and RUL 3 in 2030. Put an initial-year payment directly into the cash flow and identify available funding; never divide its catch-up cost by zero.

A warranty-covered repair can still leave reserve costs

Record certificate, issuer, expiration, covered failure, claim procedure, exclusions, and maintenance duties separately from useful life. Warranty expiration establishes neither a failure date nor a replacement year. Carlisle's March 14, 2025 Owner's Manual and Johns Manville's RS-1780 5-26 Owner's Manual distinguish owner maintenance and contractual coverage. Use roof warranty types and NDL coverage to organize the actual certificate.

Budget the owner's complete project obligation. Show recoveries separately with claim status after checking labor, access, consequential damage, alterations, and emergency-repair provisions; an unaccepted claim supplies no project cash.

Which useful-life values should the worksheet start with?

HUD's publicly linked CNA e-Tool useful-life table assigns 20 years to gravel-finished built-up roofs and 25 years to asphalt pavement, while allowing an independently assessed remaining useful life with justification. These are program category defaults; the table's introduction distinguishes fixed standard EUL from assessed RUL. HUD CNA EUL table, pp. 1 and 8

The worked packaged RTUs use an Anvilfield 15-year assumption, separate from HUD's condenser category. DOE's Advanced RTU Campaign decision tree uses equipment inventory and field evaluation to guide maintain, retrofit, or replace decisions; its screening ages are not universal retirement dates.

CAI 2023 sets no minimum or maximum useful or remaining useful life. Assign RUL from the installed component: drainage, corrosive exposure, duty, recurring repairs, parts availability, and performed maintenance. When installation age is unknown, preserve that uncertainty and document the condition and service evidence supporting the assigned replacement year. S1

One RTU with recurring compressor failures needs its own timing decision unless the other units share its replacement justification. For roofs, distinguish a repairable flashing defect from widespread assembly deterioration.

Use maintenance performed, not maintenance promised

GAF's October 2015 Scheduled Maintenance Checklist gives annual inspection as the minimum and twice yearly as optimal. Carlisle's March 14, 2025 manual recommends six-month inspections and additional checks after specified weather events and rooftop work. Johns Manville's RS-1780 5-26 manual recommends spring and fall inspections. Follow the installed system's applicable documents rather than averaging these schedules.

Attach roof inspection and maintenance records, HVAC maintenance agreement scope, and HVAC preventive maintenance task histories. Missing maintenance evidence requires a documented RUL rationale, not a fixed percentage deduction. HUD defaults and the parent roof guide's broader ranges have different evidence bases.

How should components beyond 30 years be handled?

CAI's July 2023 Reserve Study Standards require at least 30 years of projected income and expenses in the funding plan; long-life components remain identified even when their funding begins later. CAI defines long-life by remaining life greater than 30 years, not original useful life greater than 30 years. Disclose whether funding begins now or when remaining life reaches 30. CAI 2023, pp. 9, 11 and 16-18

The separate Anvilfield metal-roof case has $80,000 current cost, 50-year UL, and 35-year RUL. With no revised assessment, it reaches RUL 30 after five elapsed years. That is a funding-review trigger, not a reason to remove the roof from the inventory.

A project with RUL 30 at the start of fiscal 2027 falls in 2057, just beyond the 2027-2056 minimum display. Extend the schedule through that payment to see its cash effect.

CAI 2023 excludes the building's interconnected structural system from its ordinary reserve inventory while allowing discrete deck, balcony, and podium-deck projects that pass the component test. Transfer corrective work, timing, and cost from separate structural inspections into project records; long-life classification does not postpone identified repairs. Apply jurisdiction-specific component requirements as recorded below. CAI 2023, p. 20

What belongs in the current replacement cost?

CAI 2023 replacement cost includes related expenses such as shipping, engineering, design, permitting, installation, and disposal. Price a defined complete project before applying escalation. An equipment-only quotation leaves the reserve short of the cost to remove, lift, connect, and commission its replacement. CAI 2023, p. 18

Estimate method. Anvilfield estimates dated 2026-11-05 multiply the stated quantities by selected direct-work allowances and add the three disclosed allowances. Replace each allowance with a dated project scope and pricing record identifying locality, access, specification, and tax treatment. CAI supplies cost-inclusion rules; the unit rates are Anvilfield inputs. Related field scope is separate from direct work, contingency is added once, and the complete total is escalated once.

Use RTU installation and startup to define lifting, curbs, electrical work, and handover. Separate sealcoat and crack-seal maintenance from full pavement replacement so concurrent mobilization and markings are not funded twice.

Mark nonrecurring corrective work as one-time. Set the successor's life and scope when replacement changes the asset type; repeat other projects at their supported intervals.

Which funding inputs must be recorded?

CAI 2023 requires disclosure of financial assumptions, including interest, inflation, taxes, and outside factors. Record balance date and receipt/payment timing to reproduce cash flow; distinguish gross return from net yield after taxes and fees. CAI 2023, p. 12

Keep replacement-year and price-escalation columns separate. Schedule the first project at 2027 plus RUL; count price escalation from year-end 2026, making 2027 step 1.

NIST Handbook 135e2025, August 2025 distinguishes current-dollar calculations using nominal rates from constant-dollar calculations using real rates. This reserve worksheet pays future bills in nominal dollars. A discounted present value can compare alternatives, but it cannot replace the future invoice amount in a liquidity schedule.

HUD's FY Q1 2027 rates sheet specifies 3.40% capital-needs inflation and 4.59% reserve yield, with a change year of 3 and unchanged long-term rates; HUD's CNA page dates these inputs effective October 1, 2026. Those are HUD program inputs, separate from this worksheet's selected 3% inflation and 2% net yield. S4; S2

Add collection losses, scheduled contribution increases, loan proceeds and debt service, special-assessment receipts, and restricted accounts when applicable. Test each restricted pool separately before combining balances. Record the applicable spending restriction; pooling a calculation does not authorize transfers between accounts.

Cash-flow methods, funding targets, and percent funded

Choose the calculation method and funding target separately. CAI 2023 distinguishes summing individual component funding requirements from testing pooled cash flows. Either method still needs an explicit objective and compliance with applicable funding requirements. CAI 2023, pp. 15-17

Calculate fully funded balance before interpreting the percentage

Multiply each current replacement cost by the fraction of useful life consumed, then sum the results. Divide actual reserves by that fully funded balance, using the same valuation date for both. Under CAI 2023, percent funded alone does not establish funding adequacy. CAI 2023, pp. 16-18

FFB = Σ[current cost × (UL − RUL) / UL]; percent funded = actual reserves / FFB × 100.

The roof contributes $90,000 ($120,000 × 15/20), pavement $61,200 ($90,000 × 17/25), and RTUs $48,000 ($60,000 × 12/15). Anvilfield calculates a $199,200 fully funded balance and 50.20% funded from $100,000 opening cash. All values use the January 1, 2027 valuation convention, carrying the prepared costs forward as disclosed.

Compare intervention economics with life-cycle cost alongside the reserve analysis; the two calculations answer different questions.

Worked example: three projects across 30 years

The three projects total $270,000 in current replacement costs. Anvilfield estimates that $30,000 annual receipts produce a minimum year-end reserve of $68,103 in 2035 and $465,781 in 2056, using $100,000 opening cash, 3% cost inflation, 2% net yield, and the stated year-end payment convention. Recurring replacements are included.

Grow each current project cost to its scheduled year. Earn net interest on opening positive cash, add annual receipts, and subtract that year's project costs. A negative balance identifies an unfunded gap and earns no deposit interest.

First project year = 2027 + RUL; first step = RUL + 1; repeat steps add UL. Expense at t = current cost × (1 + g)^t. B_t = B_(t−1) + i × max(B_(t−1), 0) + contribution_t − expense_t. Here t is the annual step after year-end 2026, g is inflation, i is net yield, and B is reserve cash. Sum expenses when projects coincide.

Annual cash-flow worksheet

In 2030, opening cash of $197,933 earns $3,959; adding $30,000 and paying $67,531 for RTUs leaves $164,361. Calculations retain full precision before displaying whole dollars, so adding rounded entries can differ by a dollar.

Funding method. Anvilfield estimates use the disclosed complete costs, lives, cash, and annual timing convention. Test constant contributions against all 30 balances and round the lowest amount satisfying the $25,000 floor upward to the next dollar. Calculations are dated 2026-11-05.

The minimum annual receipt is $25,582, or $2,132 monthly across the association after rounding upward. Divide the annual target among the equal shares and months, then round each monthly payment upward to the cent. Apply actual assessment allocations and collection losses when substituting property inputs.

Review the lowest balance and its date before judging the ending surplus. The next pavement replacement occurs in 2060, and the other components continue aging. Extend the rolling horizon at each update to keep those obligations visible.

What happens when timing, inflation, or yield changes?

Change one assumption at a time while retaining $30,000 annual receipts and the selected $25,000 year-end floor. The final column solves for the smallest constant annual receipt meeting the floor.

The earlier roof gets less accumulation time and coincides with the first RTU renewal. Its next cycle moves to 2050, preserving the 20-year interval. The initial-year roof case pays in 2027 and 2047; despite its larger final balance, it leaves only $8,400 in the first year.

At 5% inflation, the selected plan misses the floor by $3,647 in 2035. Raising constant annual receipts to $30,374 beginning in 2027 restores the target. The $374 annual increase raises the monthly payment per share to the higher-inflation amount in Table H2. If the increase starts later, recalculate the catch-up receipt needed.

Show special assessments, loan proceeds, and repayment costs explicitly when selected. Size the funding response to the cash target and payment dates instead of delaying condition-required work to hide a shortfall. Check milestone invoices against monthly collections for near-term projects; a solvent year-end row does not establish cash availability on the contractor's invoice date.

How often should the reserve study be updated?

CAI July 2023 identifies an inspection-based reserve-study update at least every third year as best practice. Choose the service level that supplies the missing evidence; a financial refresh without a site visit supplies no new field observations. CAI 2023, pp. 5-6 and 14

At each annual budget review, reconcile completed projects, actual cash, contributions collected, new scope, current quotes, and changed condition. This is Anvilfield's operating workflow. Preserve the prior assumption and the reason for each change so a later board can distinguish a new finding from a changed budgeting choice.

Keep legal requirements and technical standards distinct

Record the governing jurisdiction, controlling rule and effective date, required components and inspections, minimum funding, spending restrictions, and update interval. CAI 2023 recognizes jurisdictional requirements; its national methodology does not replace them. Apply the property's applicable requirements to the model. CAI 2023, pp. 9 and 17

An ordinary CAI reserve site visit is visual and non-invasive, not a structural or safety evaluation. Obtain maintenance records and separate structural-inspection reports before the update, then carry their required work and timing into the reserve inventory. CAI 2023, pp. 4, 9 and 14 Other programs impose their own assessment scope: HUD Housing Trust Fund FAQs connect age-and-condition review with replacement reserves within that housing program.

Field checklist and commissioning scope

Commission the work against study level, building and component counts, access arrangements, existing evidence, missing quantities, and required deliverables. Request separate scope and pricing for intrusive testing, specialist reports, or a preventive-maintenance manual. Set the site date, evidence-delivery date, draft date, and budget adoption deadline in the engagement.

Group access and measurement work by building and asset type so the survey covers the actual component list. Survey teams building a commercial inventory program use PorchRocket Ground Control to get building lists by business type, building size, and visible features such as rooftop units and parking lots.

• Establish maintenance/replacement responsibility for every proposed project; resolve any unassigned scope before funding it.
• Assign a stable component/project ID and location; separate unlike ages, conditions, and renewal scopes.
• Reconcile drawings, measured areas, and equipment counts; label owner-supplied information and inaccessible areas.
• Retain installation/acceptance evidence or mark calendar age unknown; record the evidence date and assign RUL from condition/service evidence.
• Apply all three CAI eligibility tests; document the operating threshold and reasons for exceptions/exclusions.
• Preserve long-life components and the selected funding-start treatment.
• Record UL, RUL, and condition rationale separately from warranty term and coverage.
• Obtain maintenance logs and structural-inspection findings; transfer required corrective work into scope and timing.
• Build complete replacement cost with related expenses; assign shared costs once.
• Reconcile available reserve cash to its source and date, excluding operating balances and committed unrelated funds.
• Disclose inflation, net yield, taxes/fees, collection timing, project payment timing, horizon, and cash-floor objective.
• Declare the initial fiscal year; place RUL-zero work in that year and translate every RUL into a calendar project year before escalating costs.
• Schedule repeat replacement cycles; mark one-time work and changed replacement types separately; test earlier work, higher costs, and lower yield.
• Test legally restricted reserve accounts and actual collected receipts separately; include debt service with any modeled loan.
• Review the minimum balance and date, not only year-30 cash or percent funded.
• Assign an owner and due date to each evidence gap; carry changes into the next budget and study update.

Request editable component/evidence records, exclusions, complete costs, funding inputs, cash flow, scenarios, and a dated change log. Obtain CAI 2023 disclosures of field sampling, client-data and prior-study reliance, material omissions, conflicts, and independence. Identify reserve balances as client-supplied and unaudited. Trace payments to project evidence.

Sources checked and reviewed: 2026-11-05. Update log: Initial edition documents the CAI July 2023 component test, source-qualified useful lives, project worksheet, and five 30-year scenarios. Review clarified structural-system scope, conflicting quantity evidence, warranty timing, and study disclosures; verified all funding results.

How to cite this page: Anvilfield, CAI reserve-study component inventory and useful-life worksheet, 2026, https://anvilfield.com/field-guides/roofing/reserve-study-component-inventory-cai/.

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FAQ

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Sources checked

• S1. CAI, Reserve Study Standards, July 2023. Opened with curl and checked 2026-11-05.
• S2. HUD, Capital Needs Assessment Tool landing page, current page checked 2026-11-05. Opened with curl and checked 2026-11-05.
• S3. HUD, CNA e-Tool Estimated Useful Life Table, current linked undated PDF. Opened with curl and checked 2026-11-05.
• S4. HUD, Current Inflation and Interest Rates, FY Q1 2027. Opened with curl and checked 2026-11-05.
• S5. HUD, CNA e-Tool v3.2 Components & Alternatives, November 2023. Opened with curl and checked 2026-11-05.
• S6. HUD, CNA e-Tool v3.2 User Guide, version 8, August 2026. Opened with curl and checked 2026-11-05.
• S7. NIST, Handbook 135e2025, August 2025, Life Cycle Costing Manual for the Federal Energy Management Program. Opened with curl and checked 2026-11-05.
• S8. GAF, Scheduled Maintenance Checklist, October 2015, #456 COMGN119; distributor-hosted manufacturer document. Opened with curl and checked 2026-11-05.
• S9. Carlisle, Owner's Manual, 03.14.25, ©2025; manufacturer-authored copy on BuildSite. Opened with curl and checked 2026-11-05.
• S10. Johns Manville, Owner's Manual, RS-1780 5-26 (replaces 4-21), ©2026. Opened with curl and checked 2026-11-05.
• S11. Foundation for Community Association Research, Best Practices Report 1, Reserve Studies/Management, revised/updated 2020. Opened with curl and checked 2026-11-05.
• S12. U.S. DOE, Advanced RTU Campaign decision tree, undated public PDF. Opened with curl and checked 2026-11-05.
• S13. HUD, Housing Trust Fund FAQs, current page checked 2026-11-05. Opened with curl and checked 2026-11-05.