Some regions, like deserts or tropical areas with stable, dry weather, may not need house wrap, especially if homes are built with moisture-resistant materials like concrete or brick. However, in climates with cold, wet winters, house wrap becomes essential. It helps protect your home by keeping moisture out, retaining heat, and lowering energy costs, making it a must-have for maintaining comfort and efficiency year-round.
What Is House Wrap?
House wrap is a thin, protective material that goes between the outside walls of your home and the siding. It blocks rain and moisture from getting inside while still letting water vapour escape, which helps prevent mould and rot. This layer also keeps drafts out, making your home more energy-efficient and protecting it from weather damage.
Types of House Wraps and Their Ideal Applications
Choosing the right house wrap depends on your home’s needs and the climate where you live. Here’s a breakdown of the common types:
Asphalt-Impregnated Paper (Felt Paper):
This is a traditional option that works well in dry climates with little rainfall. It offers basic protection against the weather but doesn’t hold up well in wet conditions, as it can break down over time and lose effectiveness.
Plastic (Polyethylene) House Wraps:
These wraps are a lightweight, easy-to-install choice for homes in moderate climates with occasional rain. They provide a balance of water resistance and breathability, but quality can vary, so it’s important to choose one that meets building standards.
Liquid-Applied House Wraps:
Designed for homes with unique architectural designs or areas exposed to strong winds, these wraps are applied as a liquid to create a seamless, custom-fit barrier. While they offer excellent protection, they require professional installation and come at a higher cost.
Self-Adhering Membranes:
Best suited for regions with heavy rain and high humidity, these wraps stick directly to surfaces for strong moisture protection. However, they can be pricier, and proper installation is crucial to prevent issues like trapped moisture.
Benefits of Installing House Wrap
- Energy Efficiency: By reducing air leaks, house wrap helps maintain indoor temperatures, leading to lower heating and cooling costs. According to Natural Resources Canada, energy efficiency improvements, including better building envelopes, saved Canadians $8.5 billion in 2019, averaging $47 per household per month.
- Moisture Protection: Prevents water infiltration, reducing the risk of mold growth and structural damage.
- Enhanced Comfort: Maintains consistent indoor temperatures, improving overall living conditions.
- Increased Home Value: Energy-efficient homes with proper moisture barriers are more attractive to buyers.
DIY Installation
Installing house wrap yourself can be a good option for small or straightforward projects, especially if you have some construction experience. It’s a cost-effective way to save on labor, but it requires careful attention to detail. You need to follow building codes and ensure there are no gaps, tears, or poorly sealed edges. Without proper installation, moisture can seep in, leading to mold, rot, and higher energy bills. For those confident in their skills and working on simpler structures, DIY can work, but it’s important to weigh the risks.
Professional Installation
Professional installation is strongly recommended for larger, more complex projects or homes in climates with heavy rain or moisture. Professionals bring the expertise needed to apply the house wrap correctly, ensuring it meets local codes and provides full protection against the elements. While the upfront cost is higher, it guarantees the house wrap performs as intended, offering better energy efficiency and long-term durability. In areas with challenging weather, like coastal or rainy climates, we recommend hiring a professional to ensure maximum protection for your home.
Comparison Table of House Wrap Types
| Type of House Wrap | Ideal Climate Conditions | Approximate Cost per Square Foot | Maintenance Requirements | Additional Considerations |
|---|---|---|---|---|
| Asphalt-Impregnated Paper | Dry, low-humidity areas | $0.15 – $0.25 | Regular inspections | Less effective in wet conditions |
| Plastic (Polyethylene) Wraps | Moderate climates | $0.20 – $0.35 | Minimal | Varies in quality; check for UV resistance |
| Liquid-Applied Membranes | High wind or complex designs | $1.50 – $3.00 | Minimal | Professional application recommended |
| Self-Adhering Membranes | High rainfall and humidity | $1.00 – $2.00 | Minimal | Ensure proper installation to prevent moisture trapping |
Frequently Asked Questions
1.- Is house wrap necessary in mild climates?
While not always essential, house wrap provides added protection against moisture and improves energy efficiency, which can be beneficial even in milder climates.
2.- Can house wrap be installed over existing siding?
No, house wrap should be installed directly over the sheathing and beneath the siding to function correctly.
3.- How long does house wrap last?
When properly installed and protected by siding, house wrap can last the lifetime of the building.
