FL General Contractor common mistakes
FL General Contractor · Understand the traps and how to avoid them.
Treating the exam as a single 'construction knowledge' test and studying trade topics only, never working a full set of business-and-financial calculation problems under time pressure.
Most candidates come from field or trade backgrounds where the day-to-day work is technical, so they underestimate how much of the exam measures financial and administrative judgment and never build speed on the arithmetic.
What to do instead
Build a calculation drill sheet covering markup versus margin, overhead allocation, retainage, progress billing, change-order pricing, and break-even volume. Work 10 problems per sitting with a timer and write the formula before substituting numbers so you can catch sign and percentage-base errors.
Confusing markup with gross margin when pricing a job, then choosing the answer that adds the desired profit percentage directly onto cost.
In the field, 'add 20 percent' usually means markup on cost, but exam items frequently ask for a margin on selling price; the two produce different dollar answers and the distractor set includes both.
What to do instead
Always identify the base of the percentage before computing. Convert between the two with margin = markup / (1 + markup) and markup = margin / (1 - margin). Practice a set of items where the same job is priced both ways so the difference becomes automatic.
Answering contract-administration items from personal experience with handshake changes and verbal directions rather than from the written notice, documentation, and entitlement sequence.
Small and mid-size contractors routinely proceed on a verbal instruction to keep the schedule moving, so the instinctive answer is 'do the work and sort out paperwork later,' which is usually the wrong choice on an exam that tests contractual procedure.
What to do instead
Memorize the standard sequence for changes, differing site conditions, delays, and claims: written notice within the stated period, then documentation, then pricing or time impact, then formal submittal. For any scenario item, ask which step is missing and select the answer that preserves the notice and record.
Reading a structural or load-path question as a materials question and selecting an answer based on what is common in local practice rather than on how load travels to the foundation.
Experienced builders recognize assemblies by habit and skip the step of tracing load, so they miss items about continuity, uplift, and lateral resistance where the locally familiar detail is not the correct structural answer.
What to do instead
For every structural item, sketch the load path in the margin: gravity down, lateral and uplift through diaphragms, collectors, and connections into the foundation. Review basic beam, column, and bearing concepts plus the difference between strength and serviceability criteria before attempting scenario questions.
Answering excavation and foundation items without accounting for the water table, soil classification, and slope or shoring requirements, treating soil as a generic stable material.
Candidates who have worked mostly on well-drained sites underestimate how often exam items hinge on groundwater, unstable or expansive soils, and protective-system triggers, and they default to the simplest excavation method.
What to do instead
Study soil classification basics, bearing capacity concepts, dewatering methods, and the conditions that require sloping, benching, or shoring. For each scenario, first state the soil and water conditions, then choose the method and the inspection or testing step that goes with it.
Mixing up concrete and masonry field requirements - cure time before loading, form removal, grout and reinforcement placement, mortar joint tolerances, and cold- or hot-weather precautions - and picking whichever number sounds familiar.
These are memorized field rules that vary by condition and standard, and candidates often remember one number without the condition that triggers it, so they apply the right value in the wrong situation.
What to do instead
Build a one-page table pairing each requirement with its trigger condition: weather limits, minimum cure or strength before loading or form removal, grout lift and consolidation limits, reinforcement placement tolerances, and mortar joint dimensions. Test yourself by covering the requirement column and reciting it from the condition.
Treating carpentry, roofing, and finish items as low-risk common sense and skipping systematic review of framing connections, roof assembly layering, flashing sequence, and finish tolerances.
These topics feel familiar from daily work, so candidates spend their study time on topics that feel harder and then lose easy points on sequencing questions such as which layer or flashing goes in first.
What to do instead
Review framing and connection basics, roof underlayment and flashing order, steep- versus low-slope requirements, and finish tolerance and substrate standards. Practice sequencing questions by drawing the assembly from deck up and marking where each flashing and membrane terminates.
Choosing a moisture-control answer that addresses only one mechanism, such as adding a vapor barrier or sealant, without considering the combined roles of drainage, air leakage, and vapor movement in the assembly.
Field fixes are usually single-product solutions, and candidates carry that habit into items that test whole-assembly performance, including where the vapor retarder belongs in different climate conditions and how it interacts with insulation and ventilation.
What to do instead
Study the four control layers - water, air, vapor, and thermal - and where each belongs in wall and roof assemblies. For each scenario, name which layer is failing and check that your chosen answer does not trap moisture or place a retarder on the wrong side of the insulation.
Answering MEP coordination items by solving each trade in isolation and ignoring clearance, sleeve and penetration, and sequencing conflicts between disciplines.
Candidates often know one trade well and reason only within it, missing items that test coordination, such as which system takes priority in a ceiling plenum, how penetrations are protected, or what must be resolved before a slab pour.
What to do instead
Review basic mechanical, electrical, and plumbing system requirements plus the coordination process: clash detection, penetration and firestop requirements, clearance and access needs, and the sequence of rough-in inspections. For scenario items, list every trade affected before selecting an answer.
Relying on general construction-safety knowledge and general code intuition instead of the jurisdiction-specific regulatory framework, licensing, lien, and notice requirements tested on this exam.
Candidates study national safety and code material because it is widely available, then encounter items on state-specific licensing, qualifying-agent responsibilities, notice and lien deadlines, and local permitting and inspection rules that general study does not cover.
What to do instead
Build a dedicated state-rules section covering licensing and qualifying-agent duties, lien and notice timelines, permitting and inspection stages, and the local adoption of building and safety codes. Pair each rule with a short scenario so you can recall the deadline or responsible party, not just the concept.