While property owners often confuse the two, a Perc Test and a Geotechnical Report serve entirely different purposes and cannot be used interchangeably for structural work.
### Perc Test (Percolation Test)
- Primary Purpose: Used solely for septic system design.
- Key Data: It measures the soil’s absorption rate in minutes per inch to determine the size of a leach field.
- Structural Relevance: It provides no data on whether soil can support a building. Building departments will not accept a perc test for foundation permits.
- Typical Cost: $100 – $300 per test hole.
### Geotechnical Report
- Primary Purpose: Evaluates soil bearing capacity for structural foundation design and repair.
- Key Data: Provides comprehensive technical details including soil type classification, density, groundwater depth, shear strength, and shrink/swell potential.
- Structural Relevance: Essential for calculating foundation dimensions and determining the depth and spacing of helical piers.
- Typical Cost: $800 – $3,500 depending on the project scope and site access.
In the Denver metro area, geotechnical reports must be prepared by a licensed geotechnical engineer and follow ASTM standards to ensure the long-term stability of the structure.
Related FAQs
-
What are the Best Layout Ideas for a Multigenerational Home?
Read More »: What are the Best Layout Ideas for a Multigenerational Home?When designing a multigenerational home, the goal is to balance private independence with shared family connection. We specialize in several layout strategies that transform Colorado homes into flexible sanctuaries for all ages: Let us help you get your project started.…
-
How can I Design a Home to Support Multiple Generations?
Read More »: How can I Design a Home to Support Multiple Generations?We specialize in high-impact solutions that transform homes into functional, flexible sanctuaries for all ages. When designing for multiple generations, we focus on balancing private living quarters with shared family zones. Key strategies we use to support multigenerational living include:…
-
Are Black Window Frames More Expensive than White Ones?
Read More »: Are Black Window Frames More Expensive than White Ones?When comparing black windows vs white windows, you can typically expect a 10–20% premium for dark finishes. This higher cost is due to several factors, including the specialized material and UV-stable coating costs required for dark frames, as well as…
-
Do Black Windows Fade Faster than White Windows in High-sun Areas like Colorado?
Read More »: Do Black Windows Fade Faster than White Windows in High-sun Areas like Colorado?In Colorado’s high-altitude climate, black window frames do tend to absorb more solar heat and UV radiation compared to white frames, which naturally reflect sunlight. Because Colorado sits at an average elevation above 5,200 feet, the intense UV exposure can…
-
Are Marvin Infinity Fiberglass Windows Worth the Investment?
Read More »: Are Marvin Infinity Fiberglass Windows Worth the Investment?Yes, Marvin Infinity fiberglass windows are widely considered a premier investment for Colorado homeowners due to their exceptional durability and energy efficiency in high-altitude environments. Because fiberglass expands and contracts at nearly the same rate as glass, these windows maintain…
