Basement Flooded After Heavy Rain? What to Do First
Put electrical safety and contaminated water first, document damage, avoid risky cleanup, and investigate the water source only when the area is declared safe.
Read article Practical guides for a drier home
Find the source of basement moisture. Fix the cause.
Practical, evidence-led guides to damp basements, crawlspaces, drainage, humidity, and foundation water problems. Start by identifying where water comes from; then choose a fix that addresses the cause, not just the stain.
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Latest articles
Browse the newest basement and crawlspace guides, with practical steps, comparisons, and safety notes.
Basement Flooring for Damp Spaces: Materials, Limits, and Preparation
Compare flooring options for basements that may be humid, cool, or occasionally damp, and learn why water source and slab conditions matter more than a product label.
Read articleWhat Size Dehumidifier Do You Need for a Basement?
Estimate dehumidifier capacity by floor area and dampness, understand pint ratings, and avoid buying a unit that cannot keep up with the moisture load.
Read articleCondensation or Basement Leak? How to Use the Foil Test Carefully
A foil test can provide one clue about surface moisture, but it cannot prove a basement wall is waterproof or reveal every hidden leak.
Read articleCrawlspace Encapsulation Explained: Benefits, Limits, and Costs
Understand what crawlspace encapsulation includes, when it may help, and why drainage, drying, pest inspection, and local building requirements must come first.
Read articleEfflorescence on Basement Walls: What the White Powder Means
Learn how mineral salts reach masonry surfaces, how efflorescence differs from mold, and how to address the moisture source before cleaning.
Read articleBefore you start
Water in the basement? Check safety first.
Never walk into standing water that may contact electrical equipment. If water is rising, the cause is unclear, or the foundation is moving, step back and call the appropriate professional.
Start with diagnosis
The essential guide
A structured way to work from visible symptoms to likely moisture sources and sensible next steps.
Wet or Damp Basement? Diagnose It, Then Fix It
Use a symptom-led checklist to distinguish leaks, groundwater, condensation, and indoor moisture before spending on basement waterproofing.
Read articleChoose your problem
Explore by topic
Follow the signs you can see and the conditions you can measure.
Drainage and Prevention
Diagnose leaks, seepage, wall stains, cracks, and basement flooding.
Repairs and Costs
Control humidity, musty odours, condensation, and surface moisture.
Humidity and Mold
Compare repair approaches, contractor quotes, pumps, and dehumidifiers.
Basement Diagnosis
Keep water away from foundations with gutters, grading, and drainage.
Good repairs start with useful evidence.
Our guides distinguish visible symptoms from proven causes, flag safety risks, and recommend professional evaluation when a DIY fix is not enough.