House wraps are designed to be breathable, allowing moisture vapor to escape from the interior of the home while preventing water from passing through. They create a barrier against outside air, which can include drafts. By sealing the exterior walls, house wrap helps to prevent air movement through the wall cavity, reducing the potential for drafts. The effectiveness of the house wrap in preventing drafts depends on several factors, including the quality of the installation, the material used, and the condition of the overall building envelope.
Benefits of House Wrap in Draft Prevention
1. Reduction in Air Infiltration
One of the key advantages of house wrap is its ability to reduce air infiltration. By effectively sealing the exterior walls, house wrap minimizes the gaps where air can enter or exit the home. This helps to prevent drafts by eliminating the pathways through which air can enter and cause discomfort.
2. Reinforcement of Insulation
House wraps can also reinforce the insulation in the walls, making it more effective in preventing drafts. By reducing air movement within the wall cavity, house wrap helps to maintain a consistent temperature and reduce heat loss or gain. This results in increased energy efficiency and improved comfort for the occupants.
3. Enhanced Moisture Control
While the main purpose of house wrap is to prevent water intrusion, its ability to control moisture can indirectly help in draft prevention. Moisture can promote mold growth and compromise the integrity of the insulation, leading to a higher likelihood of drafts. A properly installed house wrap creates a barrier against moisture, ensuring that the insulation remains dry and effective in reducing drafts.
Considerations for Effective Draft Prevention
While house wrap can contribute to draft prevention, it is important to note that its effectiveness is influenced by various factors. These include:
1. Quality of Installation
For house wrap to effectively prevent drafts, it must be properly installed. This means ensuring that it is securely attached to the walls, without any gaps or tears that can compromise its performance. Hiring experienced professionals or following manufacturer guidelines during installation is crucial for achieving optimal results.
2. Building Envelope Condition
The overall condition of the building envelope, which includes walls, windows, doors, and other openings, affects the effectiveness of house wrap in draft prevention. Addressing any existing issues, such as poor insulation or gaps around windows and doors, is essential for maximizing the benefits of house wrap.
3. Material Selection
Not all house wraps are created equal, and different materials may exhibit varying levels of draft prevention. When selecting a house wrap, look for reputable brands and consider factors such as breathability, durability, and resistance to tearing. Consulting with professionals or conducting thorough research can help in making an informed decision.
While installing house wrap can contribute to preventing drafts, it is not a guaranteed solution. House wrap offers several benefits, including reducing air infiltration, reinforcing insulation, and enhancing moisture control, all of which indirectly help in draft prevention. However, the effectiveness of house wrap in preventing drafts depends on factors such as installation quality, building envelope condition, and material selection. To achieve optimal draft prevention, it is advisable to combine house wrap installation with other measures such as sealing cracks, proper insulation, and maintenance of windows and doors.