Butt the furring strips together, tape them, and staple the tape for additional reinforcement.įrom there, you can staple the insulation product at 4-inch intervals to the furring strips using 3/4-inch tabs, then tape the seams for an air-tight seal. Then, use 1 1/4-inch self-taping sheet metal screws to secure the strips. However, in most cases, you first install 1×2 furring strips to the bottom and perpendicular to the Z purlins on 22″ centers. However, you can also use it to hold insulation on the roof.ĭifferent manufacturers provide different insulation installation guidelines. Installing Roof Insulationįurring strips are popular for holding rigid insulation materials in place, especially on masonry walls. Then position the stips on the roof and drive nails into the pre-drilled holes to secure the strips.Īfter installing the firring, set and attach the underlayment or slip sheet, then install the roofing panels. Pre-drill a hole into all four corners of each furring strip. So, you need wider planks, like 1×4 strips. In this case, the firring strips replace the decking. The gap between the two roofs cancels sound from outdoors, keeping your indoors quiet and comfortable. The strips serve as spacers between the old and new roofs, providing additional insulation and ventilation while forming a level surface for the new metal panels. However, the three main uses in roofing projects are as follows Installing a Metal Roof Over an Existing Roofįurring strips are commonly used when installing a layover (a new metal or asphalt shingles over an old roof). Applications of Furring Strips in Roofingįurring strips have a host of applications in the construction industry. They are versatile construction materials most commonly used in construction projects. On the other hand, z-channel furring strips take the shape of the alphabet Z. Hat-channel strips are heat-resistant, providing solar heat protection. They’re the most common metal furring strip design and are popular in real estate development. Hat-channel furring strips resemble hats, thus the name. Many manufacturers are happy to customize the straps to suit your project needs. Meanwhile, metal furring strips are mainly constructed in factories from aluminum or steel metal sheets. Alternatively, contractors rip plywood to form furring strips on-site. Original strips from millers are sawn from solid timber, typically softwoods like spruce and pine. Wooden furring strips are made from natural or processed wood. Here’s what you need to know about each Wood vs. The most common styles are hat-channel and z-channel. The two main types of furring strip materials are wood and metal. Types of Furring Stripsįurring strips can be categorized by material and style. Meanwhile, furring strips come in various materials, especially metal and wood. The main difference is that common boards are softwoods, typically cypress. If you’ve used common boards before, furring strips are similar. Some contractors also use furring strips to raise surfaces to prevent moisture creep. What are Furring Strips?įurring strips, also known as wood strapping or furring boards, are thin metal or wood strips used to prepare level surfaces for various projects. Arrange the strips downward to encourage moisture to run down the end caps. The strip material also matters.įor instance, metallic furring strips are stronger and thus can be placed closer. However, you should consider closer spacing for thinner furring strips. The standard furring stip spacing for metal roofs is twenty-four inches on-center. What’s the Required Spacing of Furring Strips on Metal Roofing? Read on to learn how they work, common roofing applications, and standard furring strip spacing requirements for metal roofs. However, they’re perfect for certain roofing and ceiling projects. Roofing felt underlayment over the deck completes the set for decades of a reliable roof over your head.īut did you know you can also turn to wood strips to accomplish the same? Roofing strips are less strong and durable than solid sheathing materials. Specifically, OSB and plywood provide a stable and strong surface that lasts many years with few repairs. Decking is the standard way to provide a flat surface for laying roofing shingles, tiles, etc.
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