All You Need to Know about Roofing Bolts

Jodie Marshall

Roofing bolts are used to attach shingles to roofs and other roof structures. These bolts come with a larger head and are suitable for many types of materials. These bolts are resistant to corrosion, a feature that makes them perfect for roofing the roofs of garages and greenhouses. Other benefits of roofing bolts include self-colouring and zinc plating. Non-standard sizes can also be ordered as specials.

Stainless Steel

Stainless steel Roofing Bolts are available in a wide variety of sizes and grades. Generally, a 304 grade is used to secure post-galvanised cable trays to a roof. You can also find stainless A2 304 roofing bolts that feature large heads. They require hexagon nuts, which must be bought separately. Stainless A2 304 bolts are the most common type of roofing bolts used for roofing applications.

M8 X 180mm BZP Roofing Bolts & Hex Nuts

Stainless steel roofing bolts are recyclable, as they are made of pure stainless steel. They are free of any coating, so they can be recycled in the future. They are also highly resistant to both cold and high temperatures. Stainless steel roofing bolts with flatheads and flange nuts are easy to install, as they are compatible with a Pozi screwdriver. They are also very fast to install, requiring only a few turns of the wrist.

Large Head

Large head roofing bolts are used for various applications in roof construction. They come in a variety of sizes and are commonly referred to as mushroom head bolts. Their mushroom head design helps to spread the clamping force over a wider area. The right variety pack should include bolts, washers, nuts, and screws. If you're not sure which size you need, try ordering a customized set for your project.

M6x20 Mushroom Head Roofing Bolt + Nut BZPAmong the most common types of roofing, bolts are hook bolts and mushroom head bolts. Hook bolts are specifically designed to loop around the purlin when tightened. Mushroom head bolts, on the other hand, feature a large flat head that can fasten a variety of different roofing materials. These bolts usually come complete with square nuts. They can also be used for various lightweight applications. Large head bolts have a wider head, which makes them ideal for thin materials.

Resistance to Corrosion

To determine the corrosion resistance of roofing bolts, a study was conducted. A series of inflated bolt samples were immersed in acidic and basic solutions. The pH of the acidic solution was HCl, while the basic solution had a pH of 11. The corrosion-resistant coating, called Omega-AP, was found to be ineffective at this pH level. For the tests, the corrosion-resistant coating failed to resist the acidic solution for more than a year.

Forgefix 10RBN8200 Roofing Bolts and Square Nuts ZP M8 x 200mm (Bag of 10)  FORRBN8200M from Lawson HIS

During a typical project, roof support systems may undergo premature failure due to corrosion. This corrosion can have detrimental effects on rock-related safety and excavation stability. As a result, a corrosion-resistant steel fastener should be used for roofing. To help ensure the corrosion-resistant quality of roofing bolts, an in-house corrosion testing system was installed and used to test the tensile load capacity, strength, and corrosion mechanisms of full-length roofing bolts. Using ASTM A615 grade 60 steel roofing bolts, the corrosion resistance was tested for six months.

Easy to use

Roofing bolts are widely used for various applications. The RS Range of roofing bolts is bright zinc plated, making them highly resistant to corrosion and suitable for use outdoors. They have a wide range of nut sizes that suit all types of materials. Here are a few tips for choosing the right roofing bolt. All roofing bolts should be inspected before use to ensure they will be safe to use. If in doubt, use a wrench instead of a screwdriver.

Bright Zinc Plated Steel Roofing Bolt, M6 x 20mm | RS

To ensure safety and ease of use, roofing bolts have a large head, allowing the holding force to be distributed more evenly. This feature makes the bolts suitable for use on the roof of garages and greenhouses. The large head makes them relatively corrosion-resistant and fasten right also offers self-colour or zinc-plated roofing bolts. They are also available in custom sizes. Depending on the application, roofing bolts may be too thick or too thin.

Common Sizes

Roofing bolts are ideal for joining various materials and are versatile in their uses. They have a large flat head to spread the holding force across a larger area, which makes driving and clamping more secure. They are also relatively resistant to corrosion. Armafix stocks roofing bolts in the common sizes, including M6x12 and M6x60, but can supply bolts of other sizes upon request. You may also need to order special bolts if your project requires them.


If you're using stainless steel bolts, it's important to choose one that is 100% recyclable. Unlike plated steel, stainless steel bolts can be recycled and reused in the future. Stainless steel bolts can withstand high and low temperatures, making them an environmentally friendly option. Tray roofing bolts are particularly easy to use and can be fastened quickly without causing additional damage to the roof. They have a flat head and flange nut and are compatible with Pozi screwdrivers.

Test holes for Roofing Bolts

Various factors influence the performance of roofing bolts. The initial diameter of the hole must be larger than the final one. Various types of bolts are used to fasten tiles and shingles to buildings. This article provides information on various types of bolts and how they fit together. We will also discuss the benefits and disadvantages of each type of bolt. Once you know the factors that will affect the performance of roofing bolts, you can start making your selections.

Generally, roof bolts have a three-mm thread pitch. This is equivalent to the thread pitch of a standard M24. This is about the lowest pitch that will allow a thread to be tightly secured to a surface without resulting in thread stripping. To determine if the bolt is properly secured, you must make sure that the bolt has a suitable pre-tension. This can be achieved by carefully selecting the size of the bolts and nuts.

Jodie Marshall
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