DIY Mold Inspection – Part 5: Walls, Windows & Doors

Building materials used to construct ceilings, walls, windows and doors have a propensity toward mold growth when exposed to indoor humidity, condensation, or water incursions. Because the surface areas are so large, when mold is present on them it is often discovered in substantial amounts, even when not visible to the naked eye.

When windows and doors experience condensation and water leakage it can also result in mold growth hidden inside walls and underneath flooring.


My clients are surprised when I show them mold on walls, ceilings, windows and doors in their homes that they had no idea was even in their houses.

This 94-page book, Walls, Windows, & Doors, is part five of the book series Do-It-Yourself Mold Inspection. You simply won’t find a better set of instructions for locating and dealing with mold contamination in homes. The instructions and investigation photos in this book will show you exactly how to inspect for mold on walls, windows, and doors for the subtle evidence of hidden mold growth and related moisture concerns. Whether mold on walls, windows, and doors is readily visible or difficult to see, this book will also explain why it is there and strategies to prevent it from returning.

Each of the books in the Do-It-Yourself Mold Inspection series should only be read after reading Part One: Know Your Enemy and Part Two: Hidden Moisture Sources. Those two books are critical to understanding each of the mold inspection books that cover specific areas around homes.

The knowledge you receive from these books will save you a lot of money, protect your home, guard your health, and ensure you are not taken advantage of by mold scammers. Everyone who lives or works indoors needs to read these books.

After you have finished inspecting your home you’ll likely want to read Do-It-Yourself Mold Cleaning & Prevention to ensure areas of mold growth are remediated correctly and you do not accidentally spread mold further throughout your home. This book explains your options for effective household solutions that kill mold. It contains photographs from field investigations to help you understand safe cleaning strategies before you begin so you will not risk your health or spread mold. The book will also let you know when it is in your best interest to hire a professional and how to go about that.

If you have not read it yet, you will also benefit from my gift book 6 Steps to Healthy Indoor Air. It is the perfect introduction to the actual causes of and practical solutions for poor indoor air quality that results in headaches, spread of viruses, learning disabilities, memory loss, insomnia, respiratory disorders, allergies, and asthma. You can download it free here at

Table of Contents

Why trust the author? 4
Preface 5
Sharing this book 10
Mold inspection book series 11
Ceiling inspections 12
        Acoustical ceilings 12
        Gypsum wallboard ceilings 15
        Wood ceilings 19
Wall inspections 20
        Two sides of a wall 21
        Cool wall surfaces 21
        Wallpaper 28
        Plaster walls 30
        Wood paneled walls 32
        Masonry walls 36
        Gypsum wallboard walls 39
        Heavily contaminated wallboard 41
        Baseboards 43
        Seepage and flooding 45
        Wall access holes 50
Window inspections 51
        Window water leakage 51
        Condensation 54
        Screen condensation and mold 56
        Metal windows 59
        Window sash mold 59
        Hidden areas around windows 61
        Window abutment materials 69
        Window blinds 69
        Storm window weep holes 70
        Skylight windows 72
        Window seats 73
        Basement windows 76
Door inspections 77
        Storm doors 77
        Door air leakage 73
        Door water leakage 81
        Closet doors 86
        Bathroom doors 88
        Door Jambs 89
        Doorknobs 89
Helping others 91


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