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Can You Apply Stucco Over Existing T-111 Siding?

In the 1980s, T1-11 siding was a popular choice for homes, and it remains a viable option today. However, tastes and architectural styles evolve, leading many homeowners to wonder if they can rejuvenate their T1-11 siding by applying stucco over it. This article aims to provide a comprehensive guide on the feasibility and considerations of applying stucco over T-111 siding. 

Preparing the Surface for Stucco Application 

Removing The Trim:  

The first step in applying stucco over T1-11 siding involves removing all the trim on the house. This includes trimming around corners, windows, doors, and seams. The objective is to create a flat, even surface for the stucco application. While it’s possible to retain the trim and apply stucco up to its edges, a complete removal typically results in a more seamless and aesthetically pleasing finish. 

Assessing the Condition of T1-11 Siding:  

It’s crucial to ensure the existing T1-11 siding is in good condition before proceeding with stucco application. This involves checking for and addressing issues such as dry rot and bulges: 

  • Dry Rot Areas: Small patches of rot can be repaired by cutting out the affected area and patching it with a similar material. However, extensive rot might necessitate replacing entire sections of the siding. 
  • Bulges: If the siding bulges, it’s essential to flatten these areas, as they could affect the stucco’s appearance. Additional nails or screws can help secure the siding against the studs. 

Addressing Vents and Windows: 

Replacing Vents:  

The presence of vents in T1-11 siding requires special attention. Foundation, gable, and dryer vents might need to be replaced to accommodate the thickness of the stucco, which ranges from 7/8″ to 1 3/8″. Alternatively, installing plaster stop around existing vents is a more time-consuming and potentially costly option, but it can create a recessed look that some homeowners prefer. 

Window Considerations:  

The method of window installation in T1-11 siding influences the stucco application process. Ideally, the stucco paper should align with the window edges, ensuring a waterproof seal. A more thorough approach involves removing windows, applying new flashing, and resetting them to align with the stucco thickness. This method is recommended for ensuring long-term durability and water resistance. 

Special Considerations for Doors:  

Preparing doors for stucco application is typically straightforward. Removing the existing trim around doors is necessary, and the new finish can include either plaster stop or a specially designed wood trim that integrates with the stucco. 

 

Understanding the Implications of Stucco Over T-111 Siding 

Moisture and Compatibility Concerns:  

One critical aspect often overlooked is the potential for moisture entrapment and compatibility issues when applying stucco over T-111 siding. Stucco, being a dense material, can trap moisture against the wooden siding, leading to rot and other structural issues. Consulting a professional contractor for a proper assessment is essential to address these concerns. 

Professional Assessment and Guidance:  

Given the complexities involved in applying stucco over T-111 siding, it’s advisable to consult with a professional contractor. This ensures the project adheres to local building codes and considers the building’s specific needs. A professional can provide valuable insights into the best practices and materials for the project, ensuring a durable and aesthetically pleasing outcome. 

While applying stucco over T-111 siding is feasible, it involves careful preparation, attention to detail, and an understanding of the potential risks and complications. Homeowners should consider the implications of moisture entrapment and compatibility issues and seek professional advice to ensure a successful renovation project. This guide aims to provide a solid foundation of knowledge for those considering this project, but it should not replace the expertise and guidance of qualified professionals. 

 

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