Screw Fastened Snow Guards Info
Screw-down snow guards are securely attached to the roof using screws or other fasteners. The mechanical attachment should be made using at least two #14 screws with neoprene washers to provide a strong and durable connection to the roof. As per the installation instructions, attachment should never be made just to the metal roof panel, the screws must be fastened through the roof sheet, into a structural support or purlin below.
These types of snow guards can be used with various roofing materials, including metal roofing, asphalt shingles, slate, and more. The type of fasteners and installation methods can vary depending on the roofing material. This screw-down method of attachment should never be performed on a floating standing seam type roofing panel unless the panel manufacturer approves this type of attachment. Always make sure the metal used to make the the snow guard is compatible with the roofing material to avoid galvanic reactions caused by dissimilar metals. Polycarbonate snow guards will never have a dissimilar metal reaction on a metal roof.
Proper installation is critical for the effectiveness of screw-down snow guards. Roofing professionals, experienced contractors and even do-it-your-self-installers can easily install them. The spacing and placement of the snow guards should be determined based on factors like roof pitch, snow load, and local climate conditions. Always follow the manufacturers spacing recommendations for proper placement.
Screw-down snow guards come in various materials and designs to suit different roofing styles and aesthetic preferences. Common materials include stainless steel, polycarbonate, and aluminum. Some designs may mimic the look of traditional architectural rudiments or elements found in nature.
Once properly installed, screw-down snow guards typically require minimal maintenance. Periodic inspections should be conducted to ensure that they remain securely attached, still have a tight seal around the perimeter and are kept free from debris. Confirm the metal snow guards do not have a galvanic reaction to the surface they are mounted.
Screw-down snow guards offer a high level of security and reliability due to their strong mechanical attachment. Often there are less snow guards used in comparison to adhesive mounted options. They can withstand heavy snow loads and are less likely to detach from the roof compared to bonded snow guards.
It's important to note that screw-down snow guards require drilling or penetrating the roofing material to be attach into a structural support beneath the roof surface. Proper sealing and waterproofing are essential to prevent potential leaks associated with screw holes. Always use and a high-quality clear silicone to seal under screwed down snow guards, never completely rely on premade gaskets that come with types of some snow guards. If using a snow guard with an included gasket, always seal around the perimeter of the guard with a metal roof silicone. Never use screw-down snow guards on concealed fastener type roofs unless approved by the roofing manufacturer.
Screw-down snow guards can be customized in terms of color, material, and design to match the roof's aesthetics and architectural style. Many Architectures prefer the look of straight lines that the Snow Bars present, white others prefer to accent the roof with color-matched and decorative snow guards.
Screw Down Guards Frequently Asked Questions (FAQs)
Our test results show that pad-style snow guards made of metal and polycarbonate perform similarly. To view the results of our tests, please visit the resources page. For our customers, aesthetics frequently matter just as much, if not more than strength when making a decision.
The majority of our polycarbonate pad-style snow guards come with molded starter points. Our self-tapping screws can easily drill through this material. These guards can, however, be pre-drilled if you'd like, but it's not required. Pre-drilled holes are included in the aluminum SnoCleat PBR and SnoCleat 2.67 as well as the Snojax 1 and Stainless SnowCatchers.
With a single tube of Novaflex MR150 sealant and screws, about 10 of our large polycarbonate snow guards and 20–25 of our smaller ones can be installed. Be aware that this may vary depending on the user's application. The Novaflex MR150 is not an adhesive but a sealant. It cannot be used in place of Surebond SB-190 to glue down polycarbonate snow guards.
The majority of our screw-down snow guards can be installed using one of the two screws that we currently offer. The Master Gripper is a 2" long #14 self-tapping screw used for wooden applications. The Master Driller is a 1.5" long #14 self-tapping screw for use with metal applications. Both of these fasteners have neoprene washers, are silver in color, and are made of case-hardened carbon steel. The SnoCleat 2.67 and 2.67 snow rail systems utilize 3" screws because their brackets straddle the panel's high ribs. Longer screws can be required, depending on whether or not there is insulation under the panels.
Penetration of a standing seam metal panel is never recommended. Due to the panel’s floating nature, screwing through a standing seam metal roof can compromise its waterproof integrity, potentially leading to leaks and rust. It also may void manufacturer warranties due to improper installation.
