A pre-occupancy basement radon-testing checklist for selecting the correct lower-level test location and method, checking state and professional requirements, device quality and placement, closed-building and HVAC conditions, interference controls, test timing after construction and ventilation changes, occupancy and weather records, result interpretation, confirmation or mitigation decision, qualified contractor selection, mitigation-system commissioning, post-mitigation retest, owner documentation, and ongoing retesting before a basement becomes regularly occupied.
6 items to check
The test should answer the actual occupancy or real-estate question and follow any stricter state, professional, or transaction rules.
Measurement equipment and provider should meet the selected protocol and applicable credentialing requirements.
The device should be placed and the building operated according to the selected method so the result is representative and defensible.
The decision should follow current EPA and applicable state guidance and should not treat a low or high single number without context when protocol requires follow-up.
Mitigation should use an appropriate recognized method and avoid creating moisture, exhaust, combustion, noise, structural, or maintenance problems.
Only a valid post-work test confirms that radon was reduced; the owner should monitor the system and retest after material changes and periodically according to current guidance.
Use before regular occupancy of a newly finished, newly purchased, or materially altered lower level and after construction dust, coatings, ventilation, or temporary openings no longer invalidate the selected procedure. Radon cannot be seen or diagnosed from building appearance; testing and local or state requirements control the decision. Do not enter unsupported excavations, confined or oxygen-deficient spaces, flooded or sewage-contaminated areas, energized wet areas, visibly unstable structures, or crawlspaces with unknown air, pest, mold, asbestos, or electrical hazards. Do not drill, jack, excavate, open pressurized systems, or alter structural supports without qualified direction.
A pre-finishing basement moisture checklist for rain and seasonal history, foundation and slab leakage, condensation, plumbing and HVAC sources, exterior grading and drainage, sump and drain behavior, humidity, material condition, mold or odor concerns, drying verification, radon planning, and release criteria before framing, insulation, drywall, flooring, cabinets, or stored contents hide vulnerable surfaces.
A final crawlspace encapsulation checklist for ground and wall liner type and continuity, seams and terminations, piers and penetrations, radon and soil-gas compatibility, wall insulation and termite inspection details, vents and air sealing, drainage access, sump and alarms, dehumidification or conditioned-air strategy, condensate, electrical safety, access and service clearances, humidity monitoring, cleanup, warranties, and owner maintenance before final payment.
A pre-repair foundation crack checklist for documenting location, width and pattern, movement indicators, displacement, water entry, soil and drainage context, wall type, prior repairs, nearby openings and loads, urgent safety triggers, structural or geotechnical referral, monitoring, and evidence before sealant, patching, paint, or finish work hides the condition.
A homeowner basement-waterproofing proposal checklist for comparing diagnosis, exterior versus interior scope, drainage path, footing drains, sump and discharge, crack and wall treatment, excavation limits, structural and utility risks, mold or finish removal, permits, testing, warranties, exclusions, price allowances, restoration, maintenance, and proof of performance before signing.