Complete Guide on Metal Roofing screws & How to use them

What are Roofing screws and their types?

To connect two or more objects, a fastener is used, especially to make temporary joints. Screws are a kind of fastener that is utilized in fastening objects by drilling into the fabric.

Made of hardened steel or chrome steel, roofing screws or roof fasteners are often used for metal, plastic, and fiberglass roofing applications. To prevent water from penetrating, the roofing screw must possess a sealing washer attached to that.

Roofing sheet screws generally last for nearly twenty years, provided there is no damage caused by the roof panel and self-tapping screws movement.

Fasteners are not “one size fits all,” which suggests they are available during a sort of differing types supported the project application.

We could spend tons of your time diving into each type, size, and use, but instead, we are getting to confine simple. Four main fastener types fit into two wide-range categories, and that they are as follows:

  1. Concealed Fasteners:
    Pancake head fastener
    Head fastener
  2. Hex head fastener
  3. Exposed Fasteners: Exposed gasket head fasteners
  4. Rivets/pop rivets

Importance of using a Roofing screw

Screws invoke immense pleasure and are appreciated for his or her superior fastening mechanisms. There exists a good range of roofing screws available during a sort of materials, sizes, and designs.

One such type is that the roofing screw. Roofing screws are typically manufactured from chrome steel or aluminum and are threaded up the whole length of the shaft.

Furthermore, roofing screws are often manufactured with washers to supply extra support, which is vital considering the extent of exposure roofing screws must withstand consistently.

What sizes do Roofing screws come in?

Widely used as a home roofing option, metal roofs essential to urge the roofing sheet screws within the correct size to ensure that the roof is held properly.

Also, it is important to see for water leakages while installing a roof. Roofing fasteners manufacturers make the screws in several sizes. It is important to know the importance of those different sizes:

  • 1-inch Screws: These screws give accurate distances for metal roof paneling and have only ¾-inch penetration. Since the paneling should ideally end two-three inches below the vented ridge of the house, the 1-inch screws prove to be the right choice.
  • One 1/2-inch Screw: Considered to be the quality size, these crews are used for the metal roofing project and may penetrate up to 1 1/4 inches. It helps in holding the roof inflexible.
  • 5/16-inch Screws: These screws are used specifically to stop larger screws from overlapping.
  • 1/4-inch Screws: They are employed to affix the trim of a metal roof at two-foot increments.

Installation tips for Metal Roofing Screws

Proper metal roofing installation begins with utilizing the proper equipment, starting with the screws wont to anchor your panels or shingles to the structure.

Absolute steel recommends using metal self-tapping screws with thin washers that are properly compressed to ensure a secure seal. Next, you want to confirm you are placing the screws within the appropriate place for a decent fit.

This is important as placing a screw within the top of the rib will prohibit an honest seal. If placed within the top of the rib, the screw can also potentially tilt, thus stretching the screw hole.

Finally, placing the screw within the top of the rib provides a better risk of the screw coitus interruptus when there are high winds, and this strategic placement will end in a stiff and not loose diaphragm.

More important. However, this location of the metal roof offers solid wood slightly below the panel, making it easier to fasten the screws in situ(place) securely.

Benefits of Using Metal Roofing Screws over traditional screws

Why you ought to choose screws vs nails when installing a metal roof – what are the advantages of metal screws?

Over the years, the designs have improved to maximize the advantages – ease and speed of installation, holding power, pullout values, corrosion resistance, and aesthetics, to call a couple of.

By employing a proper screw gun (2500 rpm), the screws are often installed faster than hammering nails and better control over the finished result – proper depth setting and improved sealing against water penetration.

The holding power or pullout strength of screws is substantially above any nails. Additionally, screws are often easily backed out if the necessity arises, a task not so simple with nails.

Mistakes to Avoid while Using a Metal Roofing Screw

Basic Preparation

One of the primary things to make sure a successful metal roof installation is to correctly and precisely see the roof length and slope.

Each panel should be a move to the precise size, or there can be imprecise cuts and rough edges exposed to the weather resulting in rust and roof coating failure.

Metal roof panels are available with a good sort of thicknesses, shapes, and profiles. So “measure twice, cut once” to achieve panels that mold to roof contours and supply a weathertight fit.

Fasteners and Clips

Leaking is maybe the only common problem with metal roofing. But, metal does not leak; penetrations in the metal leak. one of the largest reasons for metal roof leaks and prolonged roof maintenance is poorly installed roofing fasteners and faulty sealing washers. Errors here are often the result of:

  • Over-tightened fasteners
  • Under-tightened fasteners
  • Off-center fasteners

During installation, always check the washer to confirm screws do not seem to be over-or under-tightened. Tighten the fastener; therefore, the rubber washer is compressed, but as a rule of thumb, if the washer is splayed out and visual, then the fastener is too tight.

Installing the screw perpendicular to the metal surface permits the fastener to penetrate the steel with less effort and permits the washer to seal correctly.

Flashing, Seams, and Sealants

Flashing could be a transitional material providing a watertight seal between roofing materials, roof sections (roofline transitions, valleys, dormers), and other “non-roofing” material like vents, chimneys, and skylights.

A metal roof’s seams must be completely sealed and panels lapped correctly. As a worst-case scenario, poorly installed flashing could cause roof sections to come off in a very heavy windstorm.


Galvalume or galvanized steel metal roof can run the chance of rust and corrosion. This happens thanks to water and water-borne pollutants, but protective coatings can prevent this.

However, any damage to the coating increases the danger of rust. If metal building material is cut during installation, it leaves an open fringe of the metal exposed, which wicks in moisture. This can begin the rusting process immediately.

Oil Canning

Oil canning in metal roofing is an observed waviness or buckling across the flat areas of flat solid panels that do not normally affect the roof’s structural integrity.

While sometimes caused by inferior metal or too-low-gauge thickness, it is often caused by under- or over-tightening of roof fasteners that causes the metal to stretch, pull and dimple in various directions. An over-tightened fastener will pull down the cladding locally and may create deformations.


Your best defense against metal roof installation errors could be a thoroughly trained installation screw.

Resources like the Metal Construction Association, Metal Building Contractors & Erectors Association, and National Roofing Contractors Association can provide information on installing error-free metal roof projects.

Also, all of the main metal roofing manufacturers have installation guides that provide by-the-book advice on the way to put their roofs together. BDN has a broad category of screws at the best roofing screws price.