What Michigan Homeowners Should Know
Winter weather is not kind to all home exteriors, but it’s especially tough on masonry structures such as brick porches, patios, steps, and walkways. That’s because the mortar that holds bricks, pavers, and stones together can wear down over time because it’s particularly sensitive to cold weather.
Exposure to freezing temperatures, snow, and excess moisture can reduce mortar’s performance, durability, and longevity. That’s why it’s important for Michigan homeowners to understand how winter affects mortar and what they can do to protect their masonry. By planning for routine maintenance and repairs, homeowners can prevent costly long-term damage.
Here’s a look at how mortar behaves in cold conditions, and why proactive maintenance is such a big deal.
Cold Temperatures Slow Down Curing
Mortar needs two things to set correctly: time and the right temperature. Curing refers to the chemical process whereby water reacts with cement to harden and get strong. This reaction is reliant on temperature. Ideal curing conditions are between 40°F and 100°F. Below that, mortar may not cure properly or at all.
- When fresh mortar is allowed to freeze before it fully sets, the water inside will expand and form ice crystals, which then disrupt the internal structure.
- In turn, this weakens the mortar and doesn’t allow it to bond properly to brick or stone.
- The mortar may look solid on the surface, but in fact it will get brittle and crumbly.
- As a result, the structure won’t be able to bear weight or resist moisture.
This is why professionals must take great care to perform masonry work in winter. Special precautions, such as tenting, insulating, or heating the work area, are often needed to ensure successful results.
Freeze-Thaw Cycles = Expansion and Contraction
Freeze-thaw cycles are the enemy of mortar. When temperatures fluctuate from below to above freezing over and over again, water can get into the mortar joints due to porosity. Whenever it freezes, the mortar expands. As a result:
- Cracks can appear in the mortar joints.
- You may notice spalling or flaking surfaces.
- Existing gaps may widen.
- Bricks and stones can gradually separate.
Moisture Infiltration is an Even Bigger Issue in Winter
Moisture also causes a lot of problems for masonry work. In summer, evaporation minimizes water retention in mortar, but in winter, however, cold temperatures slow this process down. When mortar stays wetter for longer periods of time, there is a greater risk of freeze-related damage.
When paired with poor drainage, clogged gutters, or snow buildup around the foundation, the masonry issue worsens.
De-icers Degrade Masonry Surfaces
You may rely on de-icing products in the winter around your property to break up ice. Made of rock salt (sodium chloride), these de-icers can harm mortar and masonry surfaces so it’s advisable not to use them. That’s because salt speeds up moisture absorption, increases stress, and chemically reacts with mortar. All of these things point to one result: premature deterioration.
Instead of sodium chloride, use calcium magnesium acetate or sand for your driveways, porches, and walkways.
Older Mortar is Vulnerable to Winter Weather
Older mortar joints are more susceptible to winter damage. Your surfaces may experience weakening due to weather, previous repairs, and years of moisture exposure, and are at a greater risk of cracking and shifting in freezing temperatures.
Tuckpointing is one way to restore strength and keep water out. This process removes deteriorated mortar and replaces it with fresh material so you can get many more years out of your masonry structures.
Importance of Winterization and Maintenance
Homeowners should be proactive before and during winter to keep unnecessary repairs at bay. Here are some preventive measures to follow:
- Check mortar joints for cracks or gaps.
- Repair deteriorated mortar right away.
- Seal vulnerable areas near chimneys, foundations, and retaining walls.
- Improve drainage around the home.
- Use safe de-icers.
- Schedule professional masonry inspections in Metro Detroit.
When your mortar is well-maintained and cared for, it can better stand up to the harsh Michigan weather. By protecting your home’s masonry work, you can preserve your property value and curb appeal for years to come.
Contact Mortar City Masonry
Protect your home with a professional winter masonry assessment when you contact us at (586) 533-1305 today.
