Draft Detection Guide

Learn professional techniques to find air leaks and drafts in your rental home

Finding Air Leaks in Your Rental

Before you can fix drafts, you need to find them. This guide covers simple, effective techniques to identify air leaks around windows, doors, and other common problem areas in rental units.

Best Time to Check: Draft detection works best on cold, windy days when the temperature difference between inside and outside is significant.

Step-by-Step Draft Detection

Step 1: Visual Inspection

Begin with a thorough visual examination of your rental unit:

  • Check all window frames for visible gaps or cracks
  • Inspect door frames, especially at the bottom
  • Look for gaps around electrical outlets and switch plates
  • Examine baseboards for separation from walls
  • Check where pipes or cables enter through walls

Take photos of any visible gaps to track which areas need attention.

Step 2: The Hand Test

On a cold, windy day, carefully move your hand around potential draft areas:

  • Hold your hand 1-2 inches from window edges
  • Move slowly along door frames from top to bottom
  • Check around air conditioning units and vents
  • Test areas where you feel colder when sitting or standing

You'll feel cold air movement where drafts are present. Mark these locations with painter's tape for later sealing.

Step 3: The Incense or Candle Test

Safety First: Only use this method if your lease allows open flames. Keep fire safety equipment nearby and never leave flames unattended.

Light an incense stick or candle and hold it near suspected draft areas:

  • Watch for smoke movement or flame flickering
  • Move slowly along window and door edges
  • Horizontal smoke movement indicates air flow
  • Strong drafts will pull smoke or bend the flame

This is one of the most reliable methods to visualize air movement.

Step 4: The Tissue Test

A simple, safe alternative to the candle test:

  • Hold a thin piece of tissue paper or toilet paper near suspected areas
  • Watch for movement or fluttering in the paper
  • Works best in areas with moderate to strong drafts
  • Completely safe and requires no special equipment

Step 5: Document and Prioritize

Create a prioritized action plan:

  • Take photos of all identified draft locations
  • Rank areas by severity (strong, moderate, minor)
  • Estimate the size of gaps (use a ruler or coin for scale in photos)
  • Group areas by solution type (window film, weatherstripping, door sweep, etc.)
  • Focus on the most severe drafts first for maximum impact

This documentation will help you purchase the right materials and track your progress.

Common Draft Locations in Rentals

Windows

The #1 source of drafts in rental units. Check the frame perimeter, where the sash meets the frame, and around window air conditioners.

Entry Doors

Especially at the bottom sweep area and around the frame. Apartment corridor doors often have large gaps.

Electrical Outlets

On exterior walls, outlets can allow cold air to enter through gaps in insulation behind the wall plate.

Baseboards

Where baseboards meet the floor or wall, small gaps can allow significant air infiltration over time.

Balcony Doors

Sliding doors typically have gaps along the sides, top, and bottom of the sliding panel.

Bathroom Vents

Exhaust fan openings can allow backdrafts when not in use, especially in high-rise buildings.

When to Contact Your Landlord

While most minor draft sealing is tenant-friendly, some issues require landlord attention:

Landlord Responsibilities

  • Broken window seals or cracked glass
  • Damaged door frames or hinges
  • Missing or severely damaged weatherstripping (original installation)
  • Structural gaps in walls or around pipes
  • HVAC system issues causing drafts

Tenant Improvements

  • Adding window insulation film
  • Installing removable door sweeps
  • Applying self-adhesive weatherstripping
  • Using draft stoppers or curtains

Ready to Seal Those Drafts?

Now that you've identified problem areas, explore our guides for renter-safe weatherproofing solutions:

Window Films Door Sweeps Seasonal Checklist