What should I do if I discover water in my basement?

If you find water in your basement, immediately identify the source of the water intrusion. Check for visible leaks or damage to your exterior waterproofing system. If the issue persists or if you are unsure about the cause, contact a professional like Pure Maintenance Down Under to assess and address the situation.

Troubleshooting Guide

Exterior Waterproofing Troubleshooting Guide — Pure Maintenance Down Under

At Pure Maintenance Down Under, we understand that maintaining a dry basement and crawlspace in Portland, Oregon, is essential for the integrity of your home. Exterior waterproofing is a critical service that prevents water infiltration and protects your property from moisture-related damage. This troubleshooting guide aims to help homeowners identify and address common issues related to exterior waterproofing, ensuring that your home remains safe and dry. Water can be a significant adversary to your home’s structure. Over time, even the smallest water intrusion can lead to mold growth, structural damage, and increased repair costs. This guide will provide you with insights into the symptoms of exterior waterproofing failures, possible causes, and practical steps you can take to troubleshoot and resolve these issues. With the right information and a little effort, you can maintain the effectiveness of your waterproofing system and safeguard your home against the elements.

By Pure Maintenance Down Under

8 min read

Expert-reviewed

Having an Emergency?

Don't wait — call us now for 24/7 emergency service in Portland, Oregon.

(503) 664-7207

Symptoms & Causes

Identify the Problem

Match your symptoms to the most likely cause. Severity ratings help you decide how urgently to act.

Water pooling around the foundationhigh

Likely cause: Poor grading around the property, Clogged gutters, Damaged downspouts

DIY check: Ensure the ground slopes away from the foundation and clear any debris from gutters.

Cracks in the foundation wallsmedium

Likely cause: Soil settlement, Hydrostatic pressure buildup, Improper installation of waterproofing materials

DIY check: Fill small cracks with hydraulic cement and monitor for further movement.

Wet or damp basement wallshigh

Likely cause: Inadequate drainage system, Broken or missing waterproofing membrane, High groundwater levels

DIY check: Check and clear the drainage system; consider adding a sump pump.

Mold or mildew smells in the basementmedium

Likely cause: Excess moisture due to leaks, Poor ventilation, Condensation issues

DIY check: Increase ventilation and use dehumidifiers to reduce moisture levels.

Efflorescence on basement wallslow

Likely cause: Moisture seeping through walls, Salt deposits left by evaporating water, Inadequate sealing

DIY check: Clean the efflorescence with a brush and seal the walls with waterproof paint.

Water stains on interior wallsmedium

Likely cause: Leaking pipes, Water intrusion through foundation, Condensation buildup

DIY check: Identify and fix any leaks; if stains persist, consult a professional.

Puddles forming in crawlspacehigh

Likely cause: Poor exterior drainage, Broken waterproof barrier, Groundwater issues

DIY check: Ensure proper drainage and consider installing a French drain.

What to Do Next

Step-by-Step Action Plan

Follow these steps before calling a technician — you may be able to resolve the issue yourself.

Inspect Grading and Drainage

Check the grading around your home to ensure it slopes away from the foundation. Inspect gutters and downspouts for blockages that may cause overflow.

Examine Foundation Walls

Look for cracks, efflorescence, or signs of moisture on foundation walls. Document any significant findings for professional assessment if needed.

Evaluate External Waterproofing Systems

Inspect the exterior waterproofing membrane and drainage systems. Look for any signs of damage or wear that may require repair or replacement.

Monitor Indoor Humidity Levels

Use a hygrometer to measure humidity levels in your basement or crawlspace. A reading above 60% indicates a need for dehumidification.

Test for Water Intrusion

During heavy rain, monitor your basement for leaks or water intrusion. Identify the source of any water and address it immediately.

Pro Tip

Always turn off power to the unit at the breaker before inspecting any components. Safety first — even for simple checks.

When to Call a Professional