5 Common Stucco Cracks
*Note – sometimes stucco hairline cracks manifest as stairstep cracks. That is, the crack pattern follows the cinderblock structure. This crack pattern is often a sign of foundation settlement.
In short, hairline stucco cracks are common and can be easily repatched. Most are not a serious indicator of foundation damage or structural disrepair. However, hairline cracks caused by foundation settlement will likely reappear after the repair and worsen.
Stucco Foam Trim Cracks
The foam trim utilized in stucco installation can also crack, indicating that fiberglass mesh tape was not correctly implemented (if used at all). This results in two pieces of stucco not fitting tougher at the seam. Stucco foam trim cracks are susceptible to contraction and expansion depending on the weather, this cycle instigating further deterioration.
These cracks, if left untreated, can lead to severe damage due to exposure to the elements. Be sure to reach out to a professional handyman or construction company to appropriately address the problem.
Stucco Cross-Patterned Cracks
Stucco cross-patterned cracks look like a grid with overlapping vertical and horizontal lines. This indicates the lath was improperly installed. The lath is a framework (usually a mesh, metal wire, or waterproof paper pattern) that provides the framework for the mud stucco to adhere to.
If the lath was not properly stapled or nailed to the structure, it can break away and compromise the structural integrity of the affected area, creating stucco stress fractures.
To repair this stucco crack will require a complete lath removal and replacement. This is not a DIY project and a serious undertaking. You should hire a construction company or professional handyman.
Stucco Cracks Caused by Foundation Settlement
Stucco cracks caused by foundation settlement are serious because they signal possible foundation damage. The vast majority of the stucco cracks we here at Dalinghaus run into are the direct result of foundation settlement.
As mentioned previously, foundation settlement translates into stucco diagonal cracks and hairline cracks. The diagonal cracks, specifically, are a key sign and symptom for diagnosing foundation settlement. These are cracks to worry about.
Foundation settlement is when a foundation sinks or settles into incompetent, non-load-bearing soil. These weak soils are referred to as expansive soils, such as loam or clay soils (which are both highly impacted by the volume of water saturation). More water equals soil expansion, and less moisture equates to soil shrinkage.
As you can imagine, the constant expansion and shrinkage of the soil beneath your foundation can exert a tremendous amount of stress upon your home. Energy is always transferred. The pressure from the soil transfers through your foundation, into the framing of your home, outward into the stucco, and inward into the drywall.
Odds are if your foundation is suffering from settlement, in addition to stucco cracks, you would notice:
Foundation settlement requires foundation repair to appropriately address the stucco cracks. The issue with caulking over the cracks before the foundation repair is completed is that the cracks will return with gusto. The root of the issue has not yet been addressed.
The best way to combat foundation settlement is foundation underpinning. Generally, underpinning is undertaken with push pier and helical pier systems.
Steel pier systems are comprised of galvanized metal pipes that can withstand upwards of 60,000 pounds of pressure. These pipes are driven into the earth until they reach competent, load-bearing soil or bedrock and act as stilts to support your home.
Once your home is properly supported, push pier and helical pier systems allow for practical maximum recovery (the possibility of regaining inches lost by settlement). After your home has been brought up to maximum practical recovery and/or stabilized, then the stucco cracks can be patched once and for all.
To learn more about how the underpinning process works and understand how it secures your foundation against expansive soil, read our article about – Underpinning A House.
Be Proud of Your Stucco
In this article, you learned about 5 common forms of stucco cracks and their various levels of severity. You also learned about how foundation settlement (a serious foundation failure condition) can result in diagonal stucco line cracks and stucco hairline cracks. The most serious stucco cracks are caused by foundation settlement.
We know you’re tired of being embarrassed by your stucco home. Reclaim your pride and patch-and-paint your stucco or have a professional come out and address the issue. We’d love to inspect your home and help diagnose your stucco cracks.
Dalinghaus Construction Inc. has over 100 years of combined foundation repair experience. We’re here to educate and help provide peace of mind.
If you’re seriously concerned about foundation settlement, before you consider booking a free home inspection, be sure to read our article 5 Signs and Symptoms of Foundation Issues. This article will walk you through the most common signs and symptoms step-by-step to provide a clear picture of what foundation settlement looks like on the inside and outside of your home.
Also you can check – What’s Involved In A Home Foundation Inspection?