Defect library

Common Bangkok condo defects buyers should understand.

This library explains common findings that can appear during Bangkok condo inspections. It is written for buyer decisions: what the issue is, why it matters, and what usually needs to happen next.

AC drainage issue

Category: Air-conditioning / drainage
Where it appears: Bedrooms, living rooms, ceiling areas, and balcony drainage routes
How it is detected: AC operation check, visible drain routing, moisture indicators, dripping, or staining
Why it matters: Poor AC drainage can cause leaks, odor, mold, ceiling damage, and repair disputes after transfer.
Typical next action: Ask the seller or developer to correct before transfer, or obtain a repair estimate for resale negotiation.
Severity range: Moderate to critical depending on active leakage or electrical proximity

Weak AC cooling

Category: Air-conditioning performance
Where it appears: Bedrooms, living rooms, and enclosed study areas
How it is detected: Operation check, temperature response, visual condition, and age indicators where available
Why it matters: Underperforming AC can mean cleaning, servicing, refrigerant issues, drainage problems, or end-of-life replacement.
Typical next action: Request service records, repair before handover, or budget for replacement if the unit is old or weak.
Severity range: Minor to major depending on cooling failure and replacement risk

Bathroom drainage slope issue

Category: Wet area / drainage
Where it appears: Bathrooms, shower areas, and floor drains
How it is detected: Water flow check, standing water observation, and drain response
Why it matters: Poor slope can leave standing water, increase odor risk, and point to weak wet-area workmanship.
Typical next action: Request correction before transfer or use the finding in repair negotiation.
Severity range: Moderate to major depending on pooling and leakage risk

Balcony water pooling

Category: Balcony / drainage
Where it appears: Balcony floors, service areas, and drain points
How it is detected: Drainage check, slope observation, and visible water pooling
Why it matters: Standing water can create long-term moisture problems and may signal poor slope or blocked drainage.
Typical next action: Request developer correction before handover or obtain repair advice before resale purchase.
Severity range: Moderate to major depending on duration, depth, and leakage risk

Window seal failure

Category: Envelope / water intrusion
Where it appears: Window frames, balcony doors, and exterior-facing openings
How it is detected: Visual seal inspection, staining, moisture indicators, and operation checks
Why it matters: Failed seals can allow water intrusion, staining, mold growth, and hidden damage during heavy rain.
Typical next action: Ask for resealing, repair documentation, or further specialist review if active leakage is suspected.
Severity range: Moderate to critical if active water ingress is present

Loose electrical outlet

Category: Electrical / safety
Where it appears: Living rooms, bedrooms, kitchens, bathrooms, and built-in areas
How it is detected: Visual and functional outlet check
Why it matters: Loose outlets are usability and safety concerns, especially near wet areas or high-load appliances.
Typical next action: Request repair before occupancy or transfer.
Severity range: Minor to major depending on location and wiring concern

Ungrounded outlet or visible electrical safety concern

Category: Electrical / safety
Where it appears: Outlet circuits, wet areas, kitchen areas, and appliance points
How it is detected: Electrical check where accessible and visual review of outlet condition
Why it matters: Electrical safety issues can create shock risk, appliance risk, or costly correction after transfer.
Typical next action: Escalate for correction or licensed electrician review before proceeding.
Severity range: Major to critical depending on the hazard

Low water pressure

Category: Plumbing / usability
Where it appears: Bathrooms, kitchens, showers, and taps
How it is detected: Functional water pressure check at fixtures
Why it matters: Low pressure can affect daily use and may point to fixture, pump, valve, or building-system issues.
Typical next action: Confirm whether the issue is unit-level or building-level before transfer.
Severity range: Minor to major depending on extent and source

Visible moisture staining

Category: Moisture / water intrusion
Where it appears: Ceilings, walls, window surrounds, bathrooms, and AC-adjacent areas
How it is detected: Visual staining, surface condition, moisture indicators, and context review
Why it matters: Staining may indicate previous or active leakage. The cause matters more than the cosmetic mark.
Typical next action: Ask for repair history, confirm source, and request correction or further review if active moisture is suspected.
Severity range: Monitor to critical depending on active moisture and location

Cracked tiles

Category: Finishing / surface condition
Where it appears: Floors, bathrooms, kitchens, balconies, and wall finishes
How it is detected: Visual inspection and location mapping
Why it matters: Cracks can be cosmetic, but clusters or wet-area cracks may point to movement, impact, or poor installation.
Typical next action: Document location, request replacement where appropriate, and review whether the pattern suggests a larger issue.
Severity range: Minor to major depending on location and pattern

Swollen built-ins or cabinetry

Category: Built-ins / moisture
Where it appears: Kitchen cabinets, bathroom vanities, wardrobes, and laundry areas
How it is detected: Visual swelling, delamination, odor, staining, or poor door movement
Why it matters: Swelling often points to moisture exposure and may require replacement rather than simple cosmetic repair.
Typical next action: Trace likely moisture source and request repair, replacement, or cost adjustment.
Severity range: Minor to major depending on source and extent

Poor door or window alignment

Category: Fit-out / envelope
Where it appears: Internal doors, balcony doors, windows, and cabinet doors
How it is detected: Open-close checks, lock checks, visible gaps, rubbing, or incomplete closure
Why it matters: Alignment problems can affect security, water resistance, acoustic comfort, and daily usability.
Typical next action: Request adjustment or further review if linked to frame movement or water intrusion.
Severity range: Minor to major depending on function and location

Evidence and limits

Evidence basis for the defect library

The defect library translates Bangkok Inspect's inspection categories into buyer-readable examples. It is not a substitute for checking a specific unit on-site.

Evidence type

Inspection framework, defect categories, buyer report structure, severity and next-action model

Applies to

Bangkok condo buyers
pre-transfer buyers
resale buyers
owners preparing warranty claims

Does not cover

Guarantee that a specific unit has or does not have these defects
legal advice
financial advice
structural engineering certification