House wrap is a material commonly used in construction to prevent moisture infiltration into the structure of a building. It is typically installed over the sheathing of the exterior walls before the siding or cladding is applied. While its primary purpose is to protect the house from water damage, many people wonder if house wrap can also be used to cover windows. In this article, we will delve into this question and explore the benefits and drawbacks of using house wrap for window installation.
Understanding house wrap
Before we discuss whether house wrap can cover windows, let’s first understand what house wrap is and its intended purpose. House wrap is a type of material made from a permeable or non-permeable synthetic fabric, such as polypropylene or polyethylene. It acts as a weather-resistant barrier (WRB), allowing moisture vapor to escape from the house while preventing water from entering from the outside. It also helps improve energy efficiency by providing an additional layer of insulation.
The importance of properly installed window flashing
When it comes to windows, one crucial component for preventing water intrusion is window flashing. Flashing is a thin, watertight material placed around windows to create a seal and direct water away from the window and surrounding structure. Properly installed flashing is essential to ensure a watertight and airtight window installation.
Using house wrap for window installation
While house wrap is not designed specifically for window installation, it can be used in conjunction with proper window flashing to provide an additional layer of protection against water infiltration. Here’s how it can be done:
- Install window flashing: Before applying house wrap, it is crucial to install proper window flashing. Flashing should be placed around the window frame, extending over the top and down the sides, creating a watertight seal.
- Apply house wrap around the window: After the window flashing is installed, house wrap can be applied over the window opening. The house wrap should be carefully cut and fitted around the window, ensuring it overlaps the flashing.
- Properly seal the edges: To ensure a watertight seal, the edges of the house wrap should be properly sealed using a high-quality tape designed for house wrap installations. This tape serves to prevent any water from penetrating the house wrap and entering the building envelope.
Benefits of using house wrap for windows
Using house wrap in window installation offers several benefits:
- Enhanced water protection: By adding an extra layer of protection over the window opening, house wrap helps minimize the risk of water infiltration, reducing the chances of water damage to the structure and interior of the building.
- Improved energy efficiency: The additional layer of insulation provided by house wrap can help improve the energy efficiency of the windows, contributing to reduced heating and cooling costs.
- Condensation control: House wrap allows moisture vapor to escape from the house while preventing outside moisture from entering. This helps control condensation and reduces the risk of mold and mildew growth.
Drawbacks and considerations
While using house wrap for window installation can be beneficial, there are a few drawbacks and considerations to keep in mind:
- Aesthetics: House wrap is typically installed beneath siding or cladding, making it less visually appealing when used to cover windows. This may be a concern, especially for windows that are visible from the exterior of the building.
- Potential moisture trapping: Improper installation or inadequate sealing of house wrap can lead to moisture becoming trapped between the house wrap and the window, potentially causing damage over time. Ensuring proper installation is crucial to avoid this issue.
- Code compliance: It is essential to check local building codes and regulations to ensure that using house wrap for window installation is acceptable in your area. Some codes may require alternative materials or methods for window flashing.
While house wrap is not designed specifically for window installation, it can be used in conjunction with proper window flashing to provide an additional layer of protection against water infiltration. However, it is important to consider the aesthetics, potential moisture trapping, and compliance with local building codes when considering the use of house wrap for window coverings. Consulting with a professional contractor or builder can help ensure a proper and code-compliant window installation.