9 min read · HOA & Multifamily
Most of the money boards waste on siding projects is lost to a short list of avoidable mistakes — not bad luck. Each of the 15 below has turned a routine re-side into a special assessment for some association. The good news is that every one is preventable with a process you can put in place before you sign anything. Read this before you commit, and when you want a current read on scope, schedule an HOA exterior assessment.
Mistake 1 — Selecting the lowest bid
What it is: choosing the cheapest proposal because it appears to save the association money. Why it costs: a lowball bid usually omits substrate repair, flashing detail, or proper materials, then recovers margin through change orders — or simply does the work badly and fails early. Boards routinely pay more in total than the next bid up. How to avoid it: compare bids on identical scope using the HOA siding bid comparison guide, and read why the low siding bid is the expensive one.
Mistake 2 — Not inspecting wall cavities and flashing before setting scope
What it is: pricing and contracting a project without anyone opening up the wall to see what is behind the existing siding. Why it costs: hidden dry rot, failed flashing, and water-damaged sheathing surface mid-project as enormous change orders the board never budgeted. How to avoid it: require a substrate and flashing inspection before scope is finalized, and treat any contractor who skips it as bidding blind. Background: flashing failure behind siding.
Mistake 3 — Skipping the moisture inspection
What it is: assuming the walls are dry because the siding looks intact. Why it costs: trapped moisture rots framing and grows mold invisibly; discovering it after the contract is signed means emergency repairs at the worst price. How to avoid it: insist on moisture and water-intrusion inspection as part of scoping. See water intrusion behind siding.
Mistake 4 — Accepting a vague scope with no itemization
What it is: signing a contract that says "replace siding" without line items for substrate repair, flashing, trim, paint, and cleanup. Why it costs: everything not itemized becomes an extra. How to avoid it: require an itemized scope so the board knows exactly what is and is not included before approving.
Mistake 5 — Not updating the reserve study
What it is: funding the project against a stale reserve-study figure. Why it costs: a replacement-cost number even a year or two old can badly understate today's scope, leaving the program underfunded. How to avoid it: refresh the siding line item with a current estimate before committing funds. See HOA siding reserve planning and protecting reserve funds.
Mistake 6 — Poor resident communication
What it is: starting work without clear, early notice to owners and tenants. Why it costs: complaints, conflict, and reputational damage that outlast the project — and slower change-order approvals when residents distrust the board. How to avoid it: issue advance notice with parking, noise, and timeline detail. See resident communication during construction.
Mistake 7 — No written change-order policy
What it is: leaving change orders to verbal agreement and goodwill. Why it costs: uncontrolled extras, disputes, and a board that cannot prove what it approved. How to avoid it: require a written process where no out-of-scope work proceeds without prior board or management approval. See avoiding construction disputes.
Mistake 8 — Hiring an under-insured contractor
What it is: accepting low insurance limits, no additional-insured endorsement, or unverified workers' comp. Why it costs: a serious incident can expose the association to liability it assumed the contractor carried. How to avoid it: verify coverage with the carrier and name the association as additional insured. See HOA contractor insurance and bonding requirements.
Mistake 9 — No documentation or paper trail
What it is: running the project on emails and handshakes with no organized record. Why it costs: boards turn over; without documentation a future board cannot prove what was installed, warrantied, or approved — and disputes become unwinnable. How to avoid it: keep contracts, change orders, COIs, inspection records, and closeout documents in one place.
Mistake 10 — Ignoring dry rot and treating only symptoms
What it is: replacing siding over compromised framing because the surface looked fine. Why it costs: the rot spreads under new cladding and the association pays twice. How to avoid it: address structural repair as part of the project. See dry rot warning signs and dry rot repair.
Mistake 11 — No phasing plan on a multi-building property
What it is: trying to do everything at once, or in no deliberate order, across many buildings. Why it costs: a single overwhelming budget year, maximum resident disruption, and no flexibility if conditions change. How to avoid it: sequence buildings by condition and funding across budget years. See HOA siding reserve planning.
Mistake 12 — Delaying the decision
What it is: deferring a needed re-side to avoid the cost this year. Why it costs: deterioration accelerates, hidden damage spreads, and the eventual project is larger and more expensive. How to avoid it: weigh the real cost of waiting. See the cost of delaying HOA siding replacement and signs your community needs new siding.
Mistake 13 — Skipping architectural review and approvals
What it is: choosing materials or colors without confirming the association's own guidelines and any required approvals. Why it costs: rework, owner objections, and delays. How to avoid it: confirm approved materials and color palettes up front. See HOA-approved siding materials and the HOA siding approval process.
Mistake 14 — No final walkthrough or warranty handoff
What it is: paying the final invoice without a documented walkthrough and warranty registration. Why it costs: punch-list items never get fixed and warranty claims later get denied for lack of registration. How to avoid it: hold a final walkthrough and collect warranty documentation before final payment.
Mistake 15 — No ongoing maintenance plan
What it is: treating the re-side as the end of the story. Why it costs: small caulk, paint, and flashing issues go unattended and shorten the life of an expensive investment. How to avoid it: adopt an inspection cadence. See the HOA annual exterior inspection checklist and construction defect prevention.
Key takeaways
- The lowest bid is usually the most expensive once change orders and early failure are counted.
- Inspecting the wall cavity, flashing, and moisture before pricing prevents the worst surprises.
- Vague, un-itemized scope turns everything unstated into a paid extra.
- Fund against a current reserve figure, not a stale study, to avoid a special assessment.
- A written change-order policy and a real paper trail protect current and future boards.
- Phase multi-building work by condition and funding; do not do everything at once.
- Delaying a needed re-side almost always makes the eventual project larger and costlier.
FAQ
Quick Answers
Usually a tie between selecting the lowest bid and skipping the wall-cavity and moisture inspection. Both lead to massive unbudgeted change orders for hidden damage, and they often happen together.
Normalize scope so every contractor is bidding the same project, then compare. The cheapest bid on identical, fully itemized scope is fine; the cheapest bid because it quietly omitted substrate repair is not.
It can be a costly one. Deterioration and hidden moisture damage accelerate over time, so deferral usually means a larger, more expensive project and more risk of an emergency. Our cost-of-delay guide quantifies the trade-off.
Contracts, the itemized scope, every change order with its approval, certificates of insurance, inspection and moisture records, the final walkthrough punch list, and all warranty registrations — organized so a future board can find them.
Refresh at least the siding line item with a current estimate if the study is more than a year or two old. Funding a six- or seven-figure program against a stale figure is how associations end up underfunded mid-project.
Beyond complaints and lost goodwill, residents who distrust the process delay change-order approvals, contest access, and escalate disputes — all of which slow the schedule and raise cost. Early, specific notice prevents most of it.
Yes — our process is built around them: substrate and moisture inspection before pricing, itemized scope, a written change-order policy, and full closeout documentation. We install James Hardie fiber cement and LP SmartSide, and we are glad to be evaluated against these standards.
Sources
Authoritative references
- Contractors State License Board (CSLB) — verify a California contractor
- Davis-Stirling Act — California HOA governing law
- Remodeling — Cost vs. Value Report (exterior remodel ROI)
External links to government, code, and manufacturer sources. Sierra Siding is not affiliated with these organizations; references are provided for verification.