The short answer
Moisture and Water Damage
Water is the most common reason drywall cracks. When moisture soaks into the gypsum core, the material expands and softens. As it dries, it shrinks and pulls away from the framing, leaving visible cracks along seams, corners, and fasteners. Even a slow leak behind the wall can cause this over time.
In a humid climate like Rowlett, high indoor humidity can also stress drywall, especially after a flood or a burst pipe. If you notice cracking after any water event, check for damp spots or staining nearby. Moisture mapping can help pinpoint hidden wet areas before they cause more damage.
- Look for brown stains or soft spots near cracks
- Check corners and ceiling joints first
- Feel for dampness with the back of your hand
- Use a flashlight to spot subtle bulges
- Listen for a hollow sound when tapping
- Act quickly to dry the area and stop further damage
Structural Movement and Settling
Houses settle over time, and that movement transfers to the drywall. Foundation shifts, seasonal temperature swings, or even heavy foot traffic on upper floors can make walls flex slightly. Hairline cracks often appear where sheets meet, especially around door frames and windows.
This type of cracking is usually cosmetic at first, but it can widen if the movement continues. If cracks keep reopening after repairs, the underlying structure may need attention. A professional inspection can tell you whether it is a simple drywall issue or a sign of a bigger structural problem.
- Cracks near doors and windows often signal settling
- Diagonal cracks can indicate foundation movement
- Repeated cracks after repair point to ongoing stress
- Check for sticking doors or uneven floors
- Small hairline cracks are often harmless
- Wide or jagged cracks deserve a closer look
Poor Installation and Material Issues
Drywall cracks when it was not installed correctly. Gaps between sheets, missing screws, or improperly taped seams leave weak spots. If the drywall was not allowed to acclimate to the room's humidity before hanging, it can expand and crack later.
Low-quality drywall or damaged sheets from the store can also fail prematurely. Check the edges of a crack: if the paper is peeling or the core looks crumbly, the material itself may be the issue. In that case, patching alone won't hold, and a section may need replacement.
Temperature and Humidity Fluctuations
Rapid changes in temperature and humidity make drywall expand and contract. In hot summers with spring thunderstorms, indoor air can shift from dry to humid quickly. This constant movement stresses the joints and causes cracks to appear over time.
Using a dehumidifier during humid months can help stabilize the indoor environment. Keep the interior temperature consistent, especially after any water exposure. Structural drying and dehumidification can remove trapped moisture from walls and prevent future cracking.
How to Assess the Damage
Start by measuring the crack width and length. Hairline cracks under an eighth of an inch are often cosmetic and can be filled with joint compound. Wider cracks, or those that keep growing, may indicate a deeper problem with moisture or structure.
Press gently on the drywall around the crack. If it flexes or feels soft, moisture has compromised the material. If the surface is firm, the crack is likely from movement or installation. A professional can use moisture mapping to confirm whether water is still present behind the wall.
Talk to someone now
Phones are answered 24/7 for Rowlett and nearby communities.
Call Now (214) 730-5993Frequently asked questions
Can I just paint over a drywall crack?
Painting over a crack hides it temporarily, but the crack will likely reappear. Fill the crack with joint compound, sand it smooth, then prime and paint. If moisture caused the crack, fix the water source first, or the problem will return.
When should I call a professional for drywall cracking?
Call a pro when cracks are wide, jagged, or accompanied by water stains or soft spots. If cracks recur after repair, or if you suspect a leak behind the wall, professional inspection can find the root cause. Acting early prevents more extensive damage.
Does insurance cover drywall cracking from water damage?
Policies vary, and your insurer decides what is covered. Water damage from a sudden burst pipe is often covered, while gradual leaks or settling may not be. Check your policy and document the damage with photos and notes before filing a claim.