Bid Development Requirements

​​A clear, step‑by‑step look at how a professional radon mitigation bid should be created.
​​How a Bid Should Be Developed
​A proper radon mitigation bid isn’t just a price. It’s the result of a complete, in‑person evaluation of your home’s structure, airflow, and radon pathways. A contractor cannot produce an accurate or reliable bid without first understanding how your home is built.
Below is what a standards‑aligned, professional bid‑generation process should look like.
​1. A Complete On‑Site Evaluation
​Before writing a bid, the contractor should visit your home and assess:
  • review your radon test results for accuracy
  • ​identify soil‑gas entry points
  • foundation type (slab, basement, crawlspace, or combination)
  • slab thickness and access points
  • evaluate soil and sub‑slab conditions
  • existing sump pits or drain tile
  • potential suction‑point locations
  • attic or garage access for fan placement
  • electrical access for powering the fan
  • safe vent‑pipe routing options
  • any structural limitations or obstacles
​A bid generated without an on‑site evaluation is incomplete and unreliable.
​2. Diagnostic Checks (When Needed)
​Some homes benefit from simple diagnostic tests, such as:
  • checking pressure communication between rooms or slab sections
  • confirming whether a single suction point is sufficient
  • identifying areas where airflow is restricted
​These tests help ensure the system design is appropriate for your home.
​ 3. Identifying the Best System Type
​Based on the evaluation, the contractor should determine whether your home is best suited for:
  • an internal system (pipe hidden in walls, fan in attic)
  • an external system (pipe and fan on exterior wall)
  • an over‑the‑garage system (pipe routed through garage attic)
Why It Matters
​A bid is only as good as the process used to create it.
If a contractor doesn’t inspect your home in person, perform diagnostics, or follow national standards, the bid they give you isn’t a design — it’s a guess. And a guessed‑at system often underperforms, costs more later, or fails to reduce radon. Understanding how a bid should be generated protects you from shortcuts and ensures the system is designed for your home, not for convenience.