Through Wall Flashing

Our through wall flashing service expertly shields buildings from moisture, preventing water damage with precision installation. Count on our skilled team to safeguard your property's integrity, ensuring long-lasting protection against the elements.

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The Service

Masonry buildings are not immune from moisture issues. In fact, moisture accumulation behind masonry walls leading to water seepage, mold growth, and structural damage is a common concern. Through-wall flashing is one of the best methods of combating moisture buildup in masonry structures. Capital Masonry Restoration in St. Paul, MN, is your go-to masonry contractor for quality through wall flashing services. This page will discuss what through wall flashing is, why it's important, and why you should trust Capital Masonry Restoration for this service.


Through wall flashing detail is a type of moisture management system installed within the cavities of masonry walls, typically above windows and doors  The primary function of through wall flashing is to redirect water that penetrates the exterior wall to the weep holes of the system, allowing water to escape to the structure. This protects the structure from deterioration due to water infiltration, primarily the steel structural elements which are particularly vulnerable to deterioration from water infiltration.



A through wall flashing  system typically involves removing some of the masonry directly above the opening,  and replacing or restoring the structural steel angle above the opening, also known as a lintel. Once the lintel has been addressed, a metal drip edge is installed. This drip edge helps to keep water from rolling back on the underside of the lintel, helping to prevent corrosion to the steel over time. A protective membrane is then installed which prevents any water infiltration behind the brick and into the surrounding building elements.  Typically, weep ropes are then installed, which allows any water that does get behind the brick to “weep” out from behind the brick. Masonry through wall flashing detail is a critical investment for masonry buildings because it helps to prevent structural damage.  Water infiltration can lead to a host of problems, including mold growth, rusting of steel structural elements and masonry ties, and degradation of masonry units. These issues can lead to cracks in the masonry, which can ultimately cause the building to collapse in extreme cases. By installing through-wall flashing, you can prevent these moisture-related problems.


Why chose Capital Masonry Restoration?


Capital Masonry Restoration is the best contractor to choose for through wall flashing services in St. Paul, MN. We use only the best materials and methods to ensure that the flashing is durable and effective. We have a team of highly skilled and experienced masonry contractors who will install your through-wall flashing system correctly and efficiently. Additionally, Capital Masonry Restoration offers a variety of masonry restoration services, including tuckpointing, brick and stone repair and restoration, and chimney repair. Contact us today to schedule a free consultation.

Still have questions? Check out our Through Wall Flashing FAQ


  • Q: What are the signs of moisture damage in a masonry structure?

    A. Cracks, rust stains, efflorescence, and flaking paint are all signs of moisture damage. 

  • Q: How often should through wall flashing be inspected?

    A. At least once per year, and more frequently in areas with heavy rainfall.

  • Q: What types of materials can be used for through wall flashing?

    A. Metal and PVC are the most commonly used materials. 

  • Q: Does through wall flashing require maintenance?

    A. Yes, the system should be inspected and maintained to ensure that it remains effective. 

Through Wall Flashing Cost FAQ

  • Q: What is the average cost of installing through-wall flashing?

    A. The cost can vary greatly depending on the size of the project and the materials used. It's always best to get a professional quote for the most accurate estimate. 

  • Q: Are there any additional costs related to through wall flashing installation?

    A. In most cases, the quote will include all costs. However, if any unexpected issues arise during the installation, this could potentially increase the final price. 

  • Q: Is there a cost difference between metal and PVC through wall flashing?

    A. Generally, metal flashing tends to be more expensive than PVC. However, the cost can vary depending on the type and quality of the metal or PVC used. 


  • Q: How much does through wall flashing cost?

    A. The cost of through wall flashing varies depending on the size of the building, the materials used, and other factors. Contact Capital Masonry Restoration for a quote.