When it comes to protecting your home from moisture and improving energy efficiency, proper installation of house wrap is crucial. While DIY enthusiasts might be tempted to tackle this project, professional installers bring expertise and precision to ensure your home's building envelope is properly sealed. Here's what a professional does to properly install house wrap:
1. Preparation and Planning
A professional begins by:
- Assessing the home's structure and identifying potential problem areas
- Ensuring the exterior sheathing is clean, dry, and free from protrusions
- Choosing the right type of house wrap for your climate and building needs
2. Starting at the Bottom
Professionals always start at the bottom of the wall and work their way up. They:
- Extend the house wrap below the mud sill by at least 2 inches
- Seal the bottom of the house wrap to the sheathing with caulk or tape
3. Proper Overlapping
To ensure water is directed away from the structure, professionals:
- Overlap horizontal seams by at least 6 inches (upper layer over lower layer)
- Overlap vertical seams by 6-12 inches
- Use a shingle-style layering technique, similar to roofing shingles
4. Secure Fastening
For proper attachment, professionals:
- Use cap nails or cap staples, which provide better sealing than regular staples
- Space fasteners every 12-18 inches
- Ensure the wrap is taut but not overly tight to prevent tearing
5. Sealing Seams and Penetrations
To create a continuous barrier, professionals:
- Use manufacturer-approved seaming tape on all overlaps
- Pay special attention to corners, ensuring proper overlap and sealing
- Carefully seal around all penetrations (pipes, vents, electrical boxes) using flashing tape
6. Window and Door Openings
For these critical areas, professionals:
- Make precise cuts in an "I" shape
- Fold the flaps inside and secure them
- Use flashing tape around the perimeter of each opening
- Ensure proper integration with window and door flashing
7. Special Attention to Details
Professionals don't overlook important details:
- They wrap and seal the underside of cantilevers
- Apply house wrap up to the gables, even if the attic is unconditioned
- Ensure proper integration with kick-out and step flashing at roof-wall intersections
8. Quality Check
After installation, a professional will:
- Inspect the entire installation for any tears, gaps, or improperly sealed areas
- Ensure all seams are properly taped and sealed
- Verify that the house wrap is correctly integrated with other building envelope components
9. Proper Timing
Professionals understand the importance of timing:
- They install house wrap just before the exterior cladding goes up
- Minimize the wrap's exposure to UV rays and weather elements
Conclusion
Professional installation of house wrap involves much more than simply wrapping a building. It requires attention to detail, understanding of building science principles, and adherence to manufacturer specifications and local building codes. By hiring a professional, you ensure that this critical component of your home's building envelope is installed correctly, providing long-lasting protection against moisture intrusion and enhancing your home's energy efficiency.Remember, a properly installed house wrap is an investment in your home's longevity and your family's comfort. While it may be tempting to DIY, the expertise of a professional can make a significant difference in the performance of your home's building envelope.