Why Is My Foundation Cracking After a Drought?
Last updated October 25, 2026
The short answer
Soil Shrinkage and Support Loss
During a drought, the clay-heavy soils common in many areas lose moisture and shrink. As the soil contracts, it can pull away from your foundation walls, leaving voids or gaps. Without that support, the foundation slab or footings can settle unevenly, and the stress shows up as cracks.
The cracking may not happen right away. Often, the damage becomes visible when rain returns and the soil expands again, pushing against the foundation from the sides. This cycle of shrinking and swelling is a leading cause of foundation cracks after a dry period.
- Look for vertical cracks that start at the top or bottom of the wall
- Check for cracks that are wider at one end than the other
- Notice if doors or windows stick after the rain returns
- Inspect the ground around the foundation for gaps or separation
- Watch for cracks that follow a straight line along the wall
- Feel for uneven floors or sloping in the interior
Is the Crack Serious?
Not every crack is a structural emergency. Hairline cracks under a quarter of an inch wide are often cosmetic and may just need sealing. Wider cracks, especially those that are growing or letting in water, deserve a closer look from a professional.
You can monitor a crack by marking its ends with a pencil and checking the width monthly. If it widens by more than an eighth of an inch, or if you see signs of water entering through it, consider having a water damage inspection done to assess the situation.
What Causes the Cracks to Worsen
The main culprit is the ongoing movement of the soil beneath your home. When the ground dries out and then gets wet again, it shifts. This repeated movement can make small cracks grow into larger ones over time.
Poor drainage around the foundation can make the problem worse. If gutters spill water next to the house, or if the ground slopes toward the foundation, the soil will stay wetter in some spots, causing uneven expansion. Keeping the soil moisture more consistent can help reduce stress on the foundation.
Steps You Can Take at Home
You can help minimize further cracking by managing water around your home. Make sure gutters and downspouts direct rainwater several feet away from the foundation. Water the soil near the foundation during dry spells to keep it from shrinking too much, but avoid overwatering.
You can also seal small cracks with a flexible masonry caulk to keep water out. For larger cracks, or if you are unsure about the extent of the damage, a professional inspection can give you a clearer picture. Do not attempt to fill cracks that are structural without expert advice.
When to Call in the Pros
If the cracks are wider than a quarter inch, are growing, or are accompanied by sticking doors or uneven floors, it is time to have a professional look. The pros can assess whether the foundation needs stabilization or just surface repair.
A water damage inspection can identify if moisture is entering through the cracks, which can lead to more serious issues like mold or rot. If you live in Layton, keep records of when the cracks appeared and any changes you notice. This information helps the pros understand the pattern of movement.
Need help right now?
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (801) 383-0232Frequently asked questions
Will the cracks seal themselves when the weather changes?
No, foundation cracks do not seal themselves. As the soil re-wets and expands, the crack may close slightly, but it will likely reopen during the next dry spell. Sealing the crack with a flexible filler is a better approach than leaving it open to water intrusion.
How long after a drought do cracks usually appear?
Cracks can appear during the drought itself, but they often show up weeks or months later when rain returns. The soil expands and pushes against the foundation, causing stress fractures. The exact timing depends on your soil type, the severity of the drought, and how quickly the rain returns.
Can I fix a foundation crack myself with concrete?
Small cosmetic cracks can be filled with a flexible masonry caulk, but regular concrete or mortar is not a good choice. It is too rigid and will crack again as the soil moves. For larger cracks, or if you are unsure about the cause, let a professional assess the situation first.