Stair-step cracks are diagonal fissures that follow the mortar joints in brick or masonry walls. According to ACN Construction, these patterns are primarily caused by the following environmental and structural factors:
- Foundation Settlement: This occurs when a foundation moves downward due to organic material decomposing under the slab or construction on poorly compacted soil.
- Expansive Clay Soils: Common in the Denver Front Range, these soils swell significantly when wet and shrink when dry. This cyclical movement exerts uneven pressure on foundation walls.
- Hydrostatic Pressure: When soil becomes saturated with water after heavy rain or snowmelt, it pushes laterally against the foundation. This force often causes walls to bow and mortar joints to separate.
- Freeze-Thaw Cycles: Water that becomes trapped within the mortar joints can freeze and expand, which gradually widens existing hairline cracks.
Because mortar joints are the weakest part of a masonry wall, these external forces cause the wall to crack along the “path of least resistance,” resulting in the characteristic staircase pattern.
Related FAQs
-
Why do Contractors Often Charge per Pier Location Rather than Just for Materials?
Read More »: Why do Contractors Often Charge per Pier Location Rather than Just for Materials?Contractors utilize a per-pier location pricing model because it accurately reflects the specific labor, equipment, and engineering required at every individual support point. This method is considered an industry-best practice for several reasons: Independent Labor Requirements: Each pier location requires…
-
What is the Process for Cutting a Foundation for a New Window?
Read More »: What is the Process for Cutting a Foundation for a New Window?The process of cutting a foundation for a new egress window is a technically demanding task that requires specialized equipment and professional expertise. When you work with a professional team like ACN Construction, the following steps are taken: Site Preparation:…
-
How does the Cost of Helical Piers Compare to Push Piers for Residential Foundation Repair?
Read More »: How does the Cost of Helical Piers Compare to Push Piers for Residential Foundation Repair?When comparing foundation repair methods, helical piers are generally more cost-effective for standard residential projects than push piers. The total investment for each system is influenced by material costs, labor complexity, and the specific requirements of the structure. According to…
-
Can Lp Smartside Resist Hail and High Wind Damage?
Read More »: Can Lp Smartside Resist Hail and High Wind Damage?LP SmartSide is specifically engineered to resist damage from both high winds and severe hail, making it a premier choice for volatile climates like Colorado. ### Hail Resistance LP SmartSide provides industry-leading impact protection through several key features: UL 2218…
-
How do You Maintain New Sod after Installation in Arvada?
Read More »: How do You Maintain New Sod after Installation in Arvada?Maintaining new sod in Arvada is critical during the first few weeks to ensure successful root establishment in Colorado’s semi-arid climate. According to the provided guide, follow these essential maintenance steps: Initial Watering Schedule: For the first seven to ten…
