Vertical cracks in drywall are typically non-structural and often occur at the vertical seams where two drywall panels meet. While they can be unsightly, they usually signal minor home settling or seasonal expansion rather than a failing foundation. Common Causes Vertical cracks are frequently "cosmetic" and stem from the natural life of a house: Settling: Both new and old homes adjust to the soil beneath them. In new builds, "green lumber" (wood with high moisture content) shrinks as it dries, often causing cracks in the first year. Temperature & Humidity: Seasonal changes cause wood framing and drywall to expand and contract. Without consistent climate control, this movement puts stress on the joints. Poor Installation: If the paper tape at a seam wasn't applied with enough joint compound (mud) underneath, it can pull away, creating a perfectly straight vertical line. Expansion/Contraction: Long walls without "expansion joints" can crack under the pressure of natural thermal shifts. When to Worry While most vertical cracks are low-urgency, certain signs suggest you should consult a professional: 12 sites When You Shouldn't Ignore the Cracks in the Wall 09-Jun-2024 —
Framing lumber and drywall expand and contract at different rates based on temperature and humidity. Over time, this constant movement can weaken the joint compound, leading to a fracture along the seams where two sheets of drywall meet. vertical crack in drywall
Finding a vertical crack in your drywall can be unsettling, but it is one of the most common issues homeowners face. While some cracks are merely cosmetic signs of a house "breathing," others can hint at structural shifts that require immediate attention. Understanding why these cracks appear and how to fix them will help you maintain both the beauty and the integrity of your home. Why Vertical Drywall Cracks Happen Vertical cracks in drywall are typically non-structural and
Not all vertical cracks are equal. Identifying the characteristics of the crack helps determine if it is cosmetic or structural. In new builds, "green lumber" (wood with high
Keep your home between 35% and 55% humidity to prevent excessive wood shrinkage.
Opt for setting-type compounds (hot mud) for the first coat of a repair, as it shrinks less and provides a harder bond than all-purpose premixed mud.
If the crack has been determined to be cosmetic (non-structural), the following standard repair procedures are recommended.