Sunnyvale · Santa Clara County
Moisture & Water Damage in Sunnyvale, CA
5 findings that come up most often in Sunnyvale homes — assessed by a former builder who knows what this housing stock hides.
Sunnyvale's Eichler concentration means a meaningful share of the city's housing needs an inspector who understands post-and-beam construction. A conventional checklist will miss the systems that actually cost money in these homes.
That shapes what a moisture & water damage in Sunnyvale actually needs to look for. Eichler in-slab radiant heating is the finding that comes up most often here, followed closely by low-slope roof membranes. Both are specific to how Sunnyvale was built and where it sits — not items from a generic checklist.
Major Eichler tracts, extensive conventional post-war tract housing, and substantial recent attached development near the Caltrain corridor and downtown.
Local Findings
What comes up most in Sunnyvale
These are the findings this inspection is actually looking for here — drawn from how Sunnyvale was built and where it sits, not a generic list.
Eichler in-slab radiant heating
Original copper tubing embedded in the slab is effectively unrepairable once it leaks, and replacement means a new heating system entirely. I check supply and return temperatures and look for warm spots and slab-edge efflorescence.
Low-slope roof membranes
Eichler and flat-roof homes depend entirely on membrane condition. I assess membrane age, seams, drainage and any ponding, since a failure here reaches the interior quickly.
Rotted post bases at grade
Exposed structural posts meeting concrete at grade is a recurring Eichler weak point. These are structural members and their condition matters.
Single-pane glazing and condensation
Extensive original glass drives condensation, which drives fungal growth on adjacent finishes. It is a comfort, energy and moisture issue at once.
Original plumbing in conventional tracts
Galvanised supply and cast-iron waste in the city's non-Eichler housing are at the age where failure is common. Functional flow and drainage testing tells you more than pipe age.
Sunnyvale housing stock that matters here
Age and construction era change what this inspection prioritises.
Eichler tracts
Concentrated in several large neighbourhoods. The critical items are low-slope roof membrane condition, in-slab radiant heating, exposed post bases at grade, original glazing, and electrical panels in atrium or exterior locations.
2000s–present condos & townhomes
Focus on unit-boundary systems, balcony and deck waterproofing, and moisture crossing from shared assemblies.
How the inspection works
- 1
Discuss Concerns
Tell us what you've noticed — stains, smells, past leaks, or high bills.
- 2
Thermal & Moisture Scan
We scan suspect areas and confirm readings with calibrated meters.
- 3
Trace the Source
We work to identify where the water is coming from, not just where it ended up.
- 4
Report
A documented report with thermal images, readings, and recommended next steps.
What you get
- Catch leaks before they become mold or rot
- Non-invasive — no cutting into walls to find moisture
- Confirm whether past water damage was truly fixed
- Documented evidence for repairs or negotiations
Starting at $119 as a standalone visit, or added to a mold or full home inspection at a reduced rate. Call for a quote.
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