SECURED TRUSS SOLUTIONS
What is a Roof to Wall attachment?
Roof to Wall attachment refers to Section 4 of a Wind Mitigation Report. This is the metal connection between your roof trusses and wall structure.
Most roof to wall connections in homes built before 2002, and even after, are held in place by what is called “Toe Nailing”. This refers to the practice of anchoring the roof framing elements with 1-2 nails driven at an oblique angle through the truss or rood joist, into the top plate of the wall below, which can be seen in the diagram to the right.
As you can imagine, the uplift resistance in the event of a major storm or hurricane using this practice is minimal and poses a real danger to the durability of a home’s roof. Due to Florida Building Code changes in the early 2000s, the requirement for additional roof to wall connections was put in place to better protect homes from major storm force winds. Homes that implement these enhancements by a Certified General Contractor are eligible for huge annual home insurance premium savings, sometimes up to 35%. Secured Truss Solutions provides these exact retrofitting services to enhance this roof to wall connections and save you money.
Toenail Anchorage
Wind Mitigation and Retrofitting Options
Clips are metal connectors that are attached to the roof truss and the wall plate. They are designed to transfer the uplift forces from the roof to the walls during high winds.
Clips are typically made of galvanized steel or stainless steel and are available in various sizes, depending on the roof pitch and the spacing of the trusses. The primary advantage of clips is that they are relatively easy to install and are cost-effective.
Third Nail Installation
Clip Retrofit
Single Wraps are metal straps that are wrapped around the truss and secured to the wall plate with nails or bolts. Single wraps are usually made of galvanized steel or stainless steel and are available in various sizes.
They are designed to transfer the uplift forces from the roof to the walls during high winds. The primary advantage of single wraps is that they provide a more robust connection than clips, but they are more expensive and challenging to install.
Single Wrap Retrofit
Double Wraps are metal straps that are wrapped around the truss twice and secured to the wall plate with nails or bolts. Double wraps are typically made of galvanized steel or stainless steel and are available in various sizes. They are designed to transfer the uplift forces from the roof to the walls during high winds. The primary advantage of double wraps is that they provide the most robust connection and are typically required for homes in high wind zones.
In regards to the Uniform Mitigation Verification Inspection Form, to be considered clips, wraps or double wraps, the following minimum requirements must be met:
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1. Secured to truss/rafter with a minimum of three (3) nails, and
2. Attached to the wall top plate of the wall framing, or embedded in the bond beam, with less than a ½" gap from the blocking or truss/rafter and blocked no more than 1.5” of the truss/rafter, and free of visible severe corrosion.
Toenails are nails that are angled at a 45-degree angle and are driven through the roof truss into the wall plate. Toenails are the least effective type of roof-to-wall connector and are typically only used in older homes. They do not provide adequate resistance to uplift forces during high winds and are not recommended for use in new construction. In regards to the wind mitigation form, clips or straps that do not meet the minimum qualifying requirements, are considered “toe-nails.”
Double Strap Retrofit
