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How to Install Hurricane Clips on Existing Roof?

Installing hurricane clips on an existing roof involves attaching metal connectors that strengthen the connection between the roof rafters/trusses and the wall top plates, significantly improving the roof’s resistance to uplift during high winds. While technically possible for a DIY enthusiast, consulting with a licensed roofing professional or structural engineer is strongly recommended due to safety concerns and the potential to compromise the structural integrity of your home if not done correctly.

Understanding the Importance of Hurricane Clips

What are Hurricane Clips?

Hurricane clips, also known as hurricane ties or roof straps, are small metal fasteners designed to reinforce the connection between the roof and the walls of a structure. They are crucial in areas prone to high winds, like hurricane-prone regions, as they prevent the roof from being lifted off during a storm. They provide a significantly stronger connection than nails alone, and help distribute wind load.

Why Retrofit an Existing Roof?

Many older homes weren’t built with the same stringent building codes as newer constructions. Retrofitting with hurricane clips can dramatically increase the wind resistance of an existing roof, providing peace of mind and potentially reducing insurance premiums. Older homes are particularly vulnerable as the existing nail connections may have weakened over time. This retrofit strengthens the entire structure.

Steps for Installing Hurricane Clips (General Overview)

Disclaimer: This section provides a general overview. Always consult with a qualified professional before undertaking this project. Incorrect installation can weaken your roof and create safety hazards.

Inspection and Planning: Thoroughly inspect the existing roof structure for damage or rot. Identify the rafter/truss spacing and the type of wall top plate construction. This will determine the appropriate size and type of hurricane clip needed. Create a detailed plan outlining the location of each clip.
Material Selection: Choose hurricane clips that are code-approved and suitable for the specific building conditions. Select galvanized or stainless-steel clips for corrosion resistance. Ensure you have the correct nails or screws specified by the clip manufacturer.
Safety Precautions: Prioritize safety! Wear appropriate personal protective equipment (PPE) including safety glasses, gloves, and a hard hat. Use a stable ladder and consider scaffolding for reaching higher areas of the roof. Be aware of power lines.
Accessing the Attic: Gain access to the attic space. This is often necessary to properly secure the hurricane clip to both the rafter/truss and the wall top plate.
Placement and Attachment: Position the hurricane clip so that it spans from the rafter/truss to the wall top plate. Follow the manufacturer’s instructions precisely for the number and type of fasteners required. Use a hammer or impact driver to securely attach the clip. Ensure the fasteners penetrate deeply into both the rafter/truss and the wall top plate.
Coverage: Install hurricane clips on every rafter/truss at intervals specified by local building codes. Pay particular attention to corners and eaves, as these are the most vulnerable areas.
Inspection: After installation, carefully inspect each clip to ensure it is properly attached and securely fastened. Check for any signs of damage to the roof or wall structure. A professional inspection is highly recommended.

Challenges and Considerations

Working in the Attic

Attics can be hot, poorly ventilated, and cramped. Working in these conditions requires careful planning and attention to safety. Ensure adequate ventilation and take frequent breaks. Be mindful of insulation and other hazards.

Structural Integrity

Improperly installed hurricane clips can weaken the roof structure. It is crucial to use the correct size and type of clip, and to follow the manufacturer’s instructions carefully. Over-driving fasteners can damage the wood and reduce the clip’s effectiveness.

Code Compliance

Local building codes often specify the type and spacing of hurricane clips required for new construction and retrofits. Failing to comply with these codes can result in fines and liability issues. Check with your local building department for specific requirements.

Frequently Asked Questions (FAQs)

FAQ 1: How do I know if my house needs hurricane clips?

The age of your home, its location, and the local building codes in effect at the time it was built are key factors. Homes built before modern hurricane-resistant standards are more likely to need retrofitting. Consulting with a structural engineer or qualified roofing professional is the best way to determine if your home needs hurricane clips. Also, check your insurance policy, as some insurers offer discounts for hurricane mitigation measures.

FAQ 2: What type of hurricane clip should I use?

The type of hurricane clip depends on the type of roof framing (trusses vs. rafters), the spacing of the framing members, and the local building codes. Consult with a structural engineer or a qualified roofing contractor to determine the appropriate type of clip for your specific situation. Always use clips that are code-approved and specifically designed for your application.

FAQ 3: Can I install hurricane clips myself, or do I need a professional?

While technically possible for a skilled DIYer, it is strongly recommended to hire a qualified roofing professional or structural engineer. Incorrect installation can compromise the structural integrity of your roof and create significant safety hazards. Professionals have the experience and knowledge to ensure the clips are properly installed and meet code requirements.

FAQ 4: How much does it cost to install hurricane clips on an existing roof?

The cost varies depending on the size of the roof, the type of hurricane clips used, the labor costs in your area, and the complexity of the installation. Expect to pay anywhere from a few hundred to several thousand dollars. Obtaining multiple quotes from reputable contractors is recommended.

FAQ 5: What tools do I need to install hurricane clips?

The necessary tools typically include a hammer or impact driver, drill, measuring tape, safety glasses, gloves, hard hat, ladder, and potentially scaffolding. It’s crucial to have the correct size and type of fasteners specified by the hurricane clip manufacturer.

FAQ 6: Will installing hurricane clips lower my insurance premiums?

In many hurricane-prone areas, insurance companies offer discounts for homes that have been retrofitted with hurricane clips or other wind mitigation measures. Contact your insurance provider to inquire about potential discounts.

FAQ 7: How long does it take to install hurricane clips on an existing roof?

The installation time depends on the size and complexity of the roof. A small roof can typically be completed in a day or two, while larger roofs may take several days. The time will also depend on the number of workers involved and the accessibility of the attic space.

FAQ 8: Can hurricane clips be installed from the outside of the house?

While some hurricane clips can be installed from the outside, it is generally recommended to access the attic space for a more secure and thorough installation. This allows for proper attachment to both the rafter/truss and the wall top plate.

FAQ 9: What are the common mistakes people make when installing hurricane clips?

Common mistakes include using the wrong type of clip, using the wrong fasteners, failing to follow the manufacturer’s instructions, and not properly securing the clip to both the rafter/truss and the wall top plate. Ignoring local building codes is another common mistake.

FAQ 10: How often should I inspect my hurricane clips?

It is recommended to inspect your hurricane clips annually, especially after severe weather events. Look for signs of corrosion, damage, or loose fasteners. If you find any problems, consult with a qualified professional to have them repaired.

FAQ 11: Do hurricane clips completely guarantee my roof won’t be damaged in a hurricane?

No, hurricane clips significantly improve the roof’s resistance to uplift, but they don’t guarantee complete protection from all forms of hurricane damage. The severity of the storm, the overall condition of the roof, and other factors can all influence the outcome.

FAQ 12: Where can I find reputable contractors to install hurricane clips?

Ask for referrals from friends, family, or neighbors. Check online review sites like Angie’s List or HomeAdvisor. Ensure the contractor is licensed, insured, and experienced in installing hurricane clips. Always obtain multiple quotes and check references before hiring a contractor.