Foundation Cracks Can Be Alarming, But Not All Require Emergency Action – Here’s How to Tell the Difference
Discovering a crack in your foundation can send any homeowner into a panic. While foundation cracks are certainly concerning, the reality is that not every crack signals an immediate structural emergency. Understanding the different types of foundation cracks and knowing which ones require professional attention can save you both stress and money while ensuring your home’s safety.
The Most Common Types of Foundation Cracks
Hairline cracks are typically less than 1/16 of an inch wide. These non-structural cracks often result from concrete shrinkage and don’t pose an immediate risk. Hairline cracks are common in new construction foundations across the country. They usually appear within one year and caused by the settling and drying of the new foundation. These are generally cosmetic issues that can be monitored over time.
Vertical cracks in your foundation wall are less serious than horizontal cracks and do not pose a structural threat. They are commonly found in poured foundations running straight up and down your wall. Vertical cracks can appear straight up and down or within 30 degrees of vertical, and are typically caused by settlement. Because newly constructed homes can settle significantly in the first few years, vertical cracks are very common in both newly constructed and older homes.
Like vertical cracks, most diagonal foundation cracks do not pose a serious threat to the structural integrity of your foundation. They are found running a maximum 30 degrees of vertical and caused by the natural curing of the concrete foundation wall or settlement over time.
Foundation Cracks That Require Immediate Professional Attention
Unfortunately, horizontal cracks in your basement walls are often something to worry about. If you find these cracks in your house it suggests that your basement wall is starting to bow and that can be a very serious structural issue which will need professional investigation and repair. Horizontal cracks are a sign that your foundation is failing. Horizontal cracks are caused by hydrostatic (water) pressure from the outside of your home.
If you have a block-work basement rather than a poured concrete foundation, you may find a stair-step crack opening up between the blocks. These foundation cracks, as the name suggests, look like a set of steps running along the mortar joints between blocks. Stair-step cracks in basement walls suggest that you’re either facing settlement in one area of your foundation or moisture related problems happening on the outside of your walls.
Horizontal or stair-step cracks on foundation walls require immediate attention from a foundation repair company. If you’re dealing with these serious crack types and need professional foundation repair on Long Island, it’s crucial to act quickly to prevent further structural damage.
Key Warning Signs That Indicate Professional Evaluation is Needed
Cracks wider than 1/4 inch may indicate foundation movement. If you can put more than a quarter in the foundation crack call for a contractor for a professional inspection and repair options. While some mortar-based hairline cracks are common, anything larger is posing a threat.
Additional warning signs include:
- If the concrete around the crack looks or feels damp after rainfall or you see water around the crack, you may have a water infiltration issue. This can occur regardless of the type of crack, the underlying issue, and how wide the crack is, so you should routinely inspect all cracks to monitor for water intrusion.
- If they widen or lengthen, it’s a sign of worsening issues requiring professional evaluation.
- If one side of the crack is pushed in so the concrete is not flush or even on both sides of the crack, that indicates that there’s movement. You should contact a professional to inspect the foundation immediately.
Monitoring and Documentation
Cracks that continue to expand over time can also suggest problems with the support under your home. Monitor all cracks by marking the length with a pencil and checking every couple of months to make sure the crack isn’t growing. When you spot a diagonal crack snap a photo and document the date. If the crack is a hairline and a quarter cannot fit into it, you need not worry. Check back in 6 months, if the crack has continued to grow call a foundation professional for guidance.
Professional Foundation Services on Long Island
Diamond Basement Waterproofing, a division of Diamond Masonry & Waterproofing, has been servicing Long Island since 2000. Over this time, we have been able to help hundreds of customers solve their basement waterproofing needs. For over 25 years, Diamond Masonry & Waterproofing has been the trusted name for masonry and waterproofing services. Anything from wet basements and foundation cracks to water damage, we’ve helped homeowners protect their homes with reliable solutions that last.
We are a family-owned business, and we operate efficiently without a lot of overhead like many of the larger companies servicing the Long Island market. This enables us to deliver more affordable solutions to our customers. Our experienced team has been doing this for years, so you can trust us to make sure your home stays dry and secure. At Diamond Masonry & Waterproofing, we’ve got the expertise to keep your foundation safe with the care, precision, and quality your home deserves.
When in Doubt, Consult a Professional
Hairline cracks from shrinkage are normal and typically harmless, but wide or growing cracks should be professionally evaluated. If you notice warning signs, contact Groundworks for a free foundation inspection. However, it is always a good idea to have your foundation crack inspected by an expert to identify the root cause of the problem and determine if foundation repair is necessary.
Remember that foundation cracks are, for obvious reasons, one of the number one signs of foundation failure. However, not all foundation cracks are created the same, which means they won’t all require the same repair method—some may not require repair at all. The key is knowing when to act and when to simply monitor the situation.
Foundation issues can escalate quickly, making early detection and professional assessment crucial for protecting your home’s structural integrity and your family’s safety. When you spot concerning cracks, don’t wait – contact a qualified foundation specialist for a thorough evaluation.