Post-Construction Dust Assessment: Free Timeline Estimate
Enter your project details to get a dust settling timeline, 3-phase cleaning schedule, and flat-rate price estimate. No obligation — results in under 60 seconds.
Project Details
Fill in your project info to get a dust settling timeline and flat-rate estimate.
How Construction Dust Settling Works
Construction particulate doesn’t behave like normal household dust. Silica particles from drywall, concrete, and masonry can remain suspended for days and penetrate HVAC systems before settling. Professional 3-phase protocol addresses each stage of the settling process.
Phase 1 — Rough Clean
Immediately after construction wrapsHeavy debris removal, bulk dust extraction from floors and surfaces, HEPA vacuum of all horizontal surfaces. HVAC registers protected or cleaned. This phase happens before final trades (painters, flooring) complete their work.
Do not run HVAC before Phase 1 — circulation redistributes settled silica into ductwork.
Phase 2 — Detail Clean
24–48 hours after Phase 1HEPA extraction of fine particulate that resettled post-Phase 1. Window interior detailing, fixture wipe-down, cabinet interiors, trim edges. Microfiber flat-mop of all hard floors. This phase catches the 20–30% of particulate that was still airborne during Phase 1.
Phase 2 should not be skipped — settling particulate from Phase 1 leaves a secondary layer.
Phase 3 — Final Touch
Pre-occupancy or pre-handoffFinal hygiene-baseline verification. High-touch surface wipe-down, glass polishing, final floor inspection. Confirms the space meets occupancy-ready standard. Includes documentation for contractor handoff if needed.
Frequently Asked Questions
How long does construction dust take to settle after a renovation?
Fine construction dust — particularly silica particles from drywall cutting and concrete grinding — can remain airborne for 24 to 72 hours after work stops. However, the heaviest fraction settles within hours onto horizontal surfaces, HVAC registers, and ledges. Silica particles below 10 microns are respirable and require HEPA-sealed extraction to fully remove. The settling timeline also depends on HVAC circulation: running your system before professional cleaning redistributes settled particulate throughout ductwork.
What is a 3-phase post-construction clean and why does it matter?
A 3-phase protocol separates construction cleaning into three distinct visits: Phase 1 (Rough Clean) removes debris, heavy dust deposits, and construction residue before trades finish. Phase 2 (Detail Clean) addresses surfaces exposed after final trades — windows, fixtures, trim — using HEPA extraction and microfiber protocol. Phase 3 (Final Touch) is a pre-occupancy or pre-handoff inspection clean that verifies hygiene baseline. Attempting all phases in a single visit produces inferior results because Phase 2 work generates dust that contaminates freshly cleaned Phase 3 surfaces.
Is silica dust dangerous in a newly renovated home?
Yes. Crystalline silica is classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC). In residential renovation contexts, silica dust primarily comes from cutting drywall, concrete, masonry, and tile. Respirable silica particles (below 10 microns) cannot be seen by the naked eye and settle slowly. Standard household vacuums exhaust unfiltered air and redistribute these particles. HEPA-13 sealed extraction systems, used by professional post-construction cleaning teams, capture 99.97% of particles at 0.3 microns — the effective standard for safe removal.
How much does post-construction cleaning cost in St. Louis?
Post-construction cleaning in St. Louis is priced by square footage using a transparent flat-rate model. Clean Town & Country starts at approximately $0.50 per square foot for standard dust loads, with a heavy-dust multiplier applied for projects involving significant drywall cutting, concrete grinding, or popcorn ceiling removal. Projects with heavy silica loads typically run 25–30% higher due to the additional HEPA extraction passes required. The minimum for post-construction work is $450. Use the assessment tool above to get a project-specific range.
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