Sample Project

Lakewood Commerce Center

  Denver, CO  ·  Commercial Construction  ·  365 days

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Lakewood Commerce Center

Denver, CO (5,280 ft elevation)
Apr 14, 2026 – Apr 13, 2027
365-day project · Commercial Construction
  NOAA GHCN · 10-yr avg
Avg Temperature
52°F
High: 66°F / Low: 38°F
Rainy Days
89
Total: 14.2" annual precip
>0.04 in/day
Heavy Rain
18
Work-stopping days
>0.6 in/day
Measurable Snow
23
Total: 53" seasonal
Wind Speed
14 mph
Max: 42 mph recorded
≥30 km/h impact
Extreme Heat
3
Days over 100°F
Reduces ideal days
Workable Days
257
Ideal: 198 days (full output)
Risk Score
38
Moderate Risk
Weather Risk Analysis
Composite Score Calculation: Each factor is weighted and combined to produce the total risk score (0–100):
• Precipitation (30%) + Temperature (25%) + Wind (20%) + Workability (25%) = Total Risk
Precipitation Risk (30% weight)
40%
Temperature Risk (25% weight)
58%
Wind Risk (20% weight)
25%
Workability Risk (25% weight)
Based on % of days suitable for construction
30%

Risk Mitigation Recommendations

  • Exterior envelope phase (Oct–Dec) is your primary risk window — add 15–18 days of schedule float or accelerate Phase 3 to finish before hard freeze.
  • Temperature is the dominant risk factor. Denver averages 89 freeze nights per year — schedule all concrete pours during May–September window for lowest risk.
  • Crane/steel operations: implement lightning protocol June–August. Schedule all crane lifts for 6 AM–12 PM to avoid afternoon thunderstorms (avg 12 days/month in peak season).
  • Overall project workability is 70.4% (257/365 days). Build weather float proportionally — approximately 4.4 weeks is statistically justified for a 12-month project at this location.
Smart Recommendations
Actionable insights based on your project's weather analysis
Estimated Weather Delay: 25–62 Days Across All Phases
Based on historical weather patterns and phase-specific risk levels, weather events could cause 25–62 cumulative delay days across your 6 phases. This is separate from overall project non-workable days and accounts for activity-specific vulnerability (roofing delays more than interior work, steel erection delays more than earthwork).
Build 9 days of project float into your schedule and communicate weather contingency to stakeholders at contract signing.
1 High-Risk Phase Identified
Exterior Envelope & Roofing — weather conditions during this phase are significantly unfavorable for roofing and sealant work. Oct–Dec spans Denver's most volatile transition with zero tolerance for rain (roofing), freezing sealant thresholds, and wind-driven OSHA stop-work triggers.
Review Phase 4 dates and consider shifting earlier into September, or budget additional weather protection methods (tarps, heated enclosures, temporary roofing covers).
Accelerate Phase 4 Start or Add Schedule Float
The exterior envelope phase (Oct 12–Dec 10) is your biggest risk. If Phase 3 finishes on schedule by Oct 11, you have only 19 days before Denver's average first freeze that stops sealant and roofing work. Historical data shows 3–5 significant snow events during this window and 62% of nights below 25°F by November.
Add 15–18 days of schedule float into Phase 4, or accelerate Phase 3 by 2 weeks. Do not start this phase without contingency built in.
Lightning Protocol for Crane Operations (Jul–Aug)
Denver averages 12 afternoon thunderstorm days in July and 10 in August. Historical data shows 90% of lightning activity occurs between 1–7 PM, requiring crane shutdowns. Unmanaged scheduling loses 8–10 crane days per month in peak season.
Schedule all crane lifts and steel connections for 6 AM–12 PM. Recovers an estimated 8–10 work days versus unmanaged schedule.
April Snowmelt Creates Saturated Ground Conditions
Denver's April snowmelt creates 4–8 days of saturated ground conditions annually. Three years in ten see a significant late-April storm (>6″) that delays earthwork by 3–5 days. Excavation and grading must be complete before May 1 to protect the foundation timeline.
Complete excavation and grading by May 1. Install temporary drainage before foundation pour. Pre-order concrete and drainage materials to avoid supply delays.
April 14 Start Date Is Optimal
Your project start aligns perfectly with Denver's spring recovery window. The foundation phase (May 30–Jul 28) lands in the best 60-day weather window of the year — 88% workability, zero freeze risk, and consistently 60–85°F temperatures for ideal concrete curing.
Do not delay the start. Pushing past May 1 compresses the summer window and shifts the Phase 4 risk window deeper into winter.
Material Delivery Buffer — Jan–Feb Interior Phase
During Phase 5 (Dec–Feb interior work), exterior conditions will average 29–46% workability. While your crew works inside, delivery trucks and material staging are still weather-dependent. Long-lead MEP items ordered in December or later face supply-chain exposure during Denver's worst weather window.
Pre-order all long-lead MEP items before December 1. Build a 5-day on-site material buffer. Pre-position critical materials before the Nov 30 deadline.
Monthly Weather Breakdown
Month Heavy Rain Days Work-Stopping Cold Heavy Snow Days Workable % Risk Level
April2 days0 days1 days73%Low
May2 days0 days0 days87%Low
June2 days0 days0 days87%Low
July3 days0 days0 days77%Low
August2 days0 days0 days81%Low
September2 days0 days0 days87%Low
October1 days0 days2 days65%Medium
November1 days2 days3 days47%High
December0 days5 days4 days29%High
January0 days6 days5 days26%High
February0 days4 days4 days46%High
March1 days1 days4 days58%Medium

Work-Stopping Cold = days ≤0°F requiring full work stoppage. Days between 0°F and 25°F are workable with cold-weather methods (heated enclosures, accelerators, hot-water mix).

Work-Stopping Risk Heatmap

Total work-stopping days per month (Heavy Rain + Extreme Cold + Heavy Snow)

Apr
3 days
May
2 days
Jun
2 days
Jul
3 days
Aug
2 days
Sep
2 days
Oct
6 days
Nov
10 days
Dec
18 days
Jan
21 days
Feb
12 days
Mar
6 days
Ideal (0 risk days)
Low Risk (≤10%)
Medium Risk (11–25%)
High Risk (26–40%)
Critical (>40%)
Optimal Work Periods

Historical averages only: Based on 10 years of past weather patterns. These indicate statistically favorable periods but do NOT predict specific conditions. Always monitor short-term forecasts.

Best 2-Week Period

Aug 18 – Aug 31, 2026
Weather Score: 97/100. Zero precipitation events. High temps 82–87°F, lows 58–64°F. No lightning activity in historical record for this window. Ideal for critical steel connections or any exterior work requiring dry, stable conditions.

Most Challenging Period

Jan 5 – Jan 18, 2027
Weather Score: 12/100. Average 8 freeze days (<0°F) in this window historically. High probability of multi-day snowstorms. Plan this window as a float buffer or interior-only schedule — do not assign exterior or concrete work.

Construction Phase Analysis

Weather risk breakdown by construction phase — activity-specific thresholds applied per work type

6
Phases Analyzed
1
High Risk
2
Moderate Risk
3
Low Risk
77%
Avg Workable
Highest Risk Phase
Exterior Envelope & Roofing
Project Timeline
Site Prep & Excav.
37d workable
Foundation & Concrete
53d workable
Structural Steel
58d workable
Exterior Envelope
29d workable
MEP Rough-In
69d workable
Interior Finishes
37d workable
Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
Site Preparation & Excavation
Low Risk
Apr 14 → May 29, 2026  |  46 days  |  Earthwork & Grading
Workable Days
31 ideal (67%) 37 workable (80%) 46 total
Avg Temps
62°F / 42°F
High / Low
Rainy Days
5
1 heavy rain
High Wind
3
0 work-stopping
Freezing Days
2
0 extreme cold
5 rainy days — monitor soil moisture and drainage conditions; saturated soil stops compaction
Saturated soil stops compaction — all rain soaks in before resuming
Equipment hydraulics sluggish below 20°F (-7°C)
Track soil moisture carefully after any rainfall event
Foundation & Concrete Work
Low Risk
May 30 → Jul 28, 2026  |  60 days  |  Concrete & Foundations
Workable Days
49 ideal (82%) 53 workable (88%) 60 total
Avg Temps
79°F / 56°F
High / Low
Rainy Days
9
3 heavy rain
High Wind
4
0 work-stopping
Freezing Days
0
0 extreme cold
3 days of heavy rain — work stoppage for rain-sensitive concrete operations
Concrete placement stops when ambient temp < 40°F (4°C) without cold-weather protection
Rain during placement dilutes mix — must stop or tent the pour
Hot days accelerate set — early morning pours recommended above 85°F
Structural Steel & Framing
Moderate Risk
Jul 29 → Oct 11, 2026  |  75 days  |  Structural Steel Erection
Workable Days
47 ideal (63%) 58 workable (77%) 75 total
Avg Temps
76°F / 52°F
High / Low
Rainy Days
12
4 heavy rain
High Wind
9
2 work-stopping
Freezing Days
1
0 extreme cold
2 days with work-stopping wind ≥ 60 km/h — crane/elevated work halts
4 days of heavy rain — work stoppage for steel erection and bolt-up
Scheduling Opportunity: Starting this phase 2 weeks earlier (Jul 15 → Sep 27) could gain 5 more workable days (84% vs current 77%). — Based on historical patterns only.
OSHA/crane manufacturer limits typically stop picks at 25–30 mph (40–48 km/h)
Lightning: 30-minute stand-down after last strike (AISC guidance)
Rain creates slip hazards on steel — connectors use judgment on light rain
Exterior Envelope & Roofing
High Risk
Oct 12 → Dec 10, 2026  |  60 days  |  Roofing
Workable Days
16 ideal (27%) 29 workable (48%) 60 total
Avg Temps
48°F / 27°F
High / Low
Rainy Days
4
1 heavy rain
High Wind
11
4 work-stopping
Freezing Days
22
5 extreme cold
22 days (37%) with freezing temps — cold-weather protection, sealant temperature limits violated
4 days with work-stopping wind ≥ 60 km/h — OSHA elevated roofing stop-work
1 day of heavy rain — zero tolerance for roofing; any precipitation stops work
Zero tolerance for rain — any precipitation stops roofing
Asphalt shingles below 40°F (4°C) become brittle; adhesive tabs don't seal
Fall hazard: wind ≥ 25 mph (40 km/h) triggers OSHA stop-work for elevated roofing
MEP Rough-In & Systems
Low Risk
Dec 11 → Feb 24, 2027  |  76 days  |  MEP Rough-In
Workable Days
58 ideal (76%) 69 workable (91%) 76 total
Avg Temps
38°F / 18°F
High / Low
Rainy Days
1
0 heavy rain
High Wind
5
1 work-stopping
Freezing Days
28
11 extreme cold
Mostly inside the building shell — significantly less weather-sensitive
Extreme cold affects copper/PVC pipe work and tool batteries
Still exposed until building is fully dried in after Phase 4
Interior Finishes & Commissioning
Low Risk
Feb 25 → Apr 13, 2027  |  47 days  |  Interior Finishes
Workable Days
30 ideal (64%) 37 workable (79%) 47 total
Avg Temps
52°F / 32°F
High / Low
Rainy Days
3
0 heavy rain
High Wind
3
0 work-stopping
Freezing Days
6
0 extreme cold
Note: Conditions improving as spring approaches. Final inspections and punch list operations benefit from April's mild and dry weather. No schedule adjustments recommended.
Minimal weather sensitivity once building is dried in and heated
Drywall mud, paint, and flooring adhesives need minimum ~50°F (10°C)
Track when building HVAC is operational — before that, weather matters more

Executive Summary

The Lakewood Commerce Center project (Denver, CO · Apr 14, 2026 – Apr 13, 2027) presents Moderate overall weather risk with a composite score of 38/100. Of 365 project days, 257 (70.4%) are workable and 198 (54.2%) meet ideal construction conditions — well above the industry average for a Colorado mountain-adjacent location.

Primary risk: The exterior envelope phase (Oct 12–Dec 10) falls squarely across Denver's most volatile weather transition window. Temperature is the dominant risk factor, with 62% of nights in November historically dropping below 25°F — stopping sealant and roofing work. This phase has only 48% workability and is the critical path item requiring immediate contingency planning.

Opportunities: The foundation phase (May 30–Jul 28) lands in Denver's optimal 60-day window with 88% workability and zero freeze risk. Morning-scheduling crane operations during the steel phase captures an estimated 8–10 additional work days per month by avoiding afternoon lightning. The interior MEP phase is largely weather-immune at 91% workability.

Recommended action: Add 15–18 days of schedule float to Phase 4, accelerate Phase 3 completion by 2 weeks if possible, and pre-order all long-lead MEP materials before December 1. A 4.4-week weather contingency is statistically justified for this location and project duration.

Analysis based on NOAA GHCN-Daily station data (Denver International Airport, USC00052223) · 10-year historical average 2014–2024 · Thresholds per commercial construction industry standards

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