The roof is such a critical part of the house; it makes sense that every choice of material to be used on the roof must be carefully selected. For example, you must use the right fasteners since fasteners hold different parts of the roof together. Below are some of the major things to consider when choosing roofing fasteners.
There are four major things you should consider when choosing fastener material. You must consider the durability of the material, the strength of the material, the effect of different weather elements on the material, and the reaction of the material with other materials on the roof. For example, if you have a metal roof, the fastener should not be of a dissimilar metal from the roof since that would trigger galvanic corrosion. Also, you don't want to end up with a weak material that will get deformed when driving it into the roof.
The fastener length is critical since it determines how strongly the fastener will hold the different roofing materials together. The fastener should be long enough to penetrate through all the materials it is supposed to fasten, such as insulation, membrane, and deck. As such, the fastener length also depends on the thickness of the materials; the thicker the materials, the longer the fastener should be. Otherwise, your roof will be weak and easily damaged by wind and other forces.
Fastener Head shape
Head shape is significant because it determines the strength of the connection between the fastener and the roofing materials. The fastener head should have a wide head for a firm hold on the topmost roofing material. Aesthetic issues also come into consideration. For example, some people consider thick fastener heads unappealing and prefer low-profile heads.
Roofing fasteners come with or without washers. The washer acts as a seal to prevent water from seeping through the tiny gaps between the washer and the roofing material. The washer can also insulate the washer from the roofing material, which is critical if the two are of different metals, and you want to prevent galvanic erosion. Note that using a fastener without a washer is better than using a faster with a washer that will degrade and loosen the fastener.
As you can see, roofing is a pretty complicated construction where even the smallest decision has far-reaching consequences. That's why it's important to make all roofing decisions with the consultation of a professional residential roofing installation company.