Finally, multiply the Sqr. M by 7 to find the number of screws needed. Round this number up to the nearest box of If you need screws, you should order , but if you need , it might be wise to order Roofit Online. Roofing done right. A lot of it really just depends upon the nature of the substrate and upon the design and layout of your metal roof. When it comes to corrugated metal paneling, one question that always comes up is exactly where to put the screws on the metal roofing in the first place.
Many advise that screws should be put in the flats or valleys only, while others swear that the screws should go in the ribs. To get an idea of how hotly-contested this topic can get, take a minute to scroll through the comment section of this popular metal roofing comparison video shared by Skywalker Roofing owner Luke Wilson!
Why do people get so passionate about this subject? Well, the screws-in-the-rib proponents say that putting screws in the flats could subject your metal roof to more potential points of leakage, since water is naturally directed to the flat areas.
Another potential problem with screwing into the rib is that it presents a higher risk of the screw pulling out during a wind event. To fasten anywhere other than where the manufacturer recommends not only increases your risk of having problems down the line, it also nullifies the warranty for your metal roofing product.
And most U. As you can see, there are several concerns to keep in mind when it comes to installing corrugated metal properly. But there IS a way to avoid all of that potential stress to begin with. Just go with a custom-fabricated, professionally-installed standing seam metal roof! Here just a few features of standing seam that make it the best metal roofing option:. With a standing seam metal roof there are ZERO exposed fasteners, meaning there are also no easy opportunities for water to penetrate.
The roof is held tight by clips which are fastened to the substrate on which the metal roofing is mounted. These roofing screws are fitted with a washer, ensuring the screw will fit snugly against the roofing sheet, allowing for maximum fixing and a water tight seal. Roof Zip 12 gauge x 50mm Class 4 Tek roofing screws for fixing into timber or steel.
Winds can create considerable forces on both the upper surface and the underside of metal roofs. To ensure roofs are secure, our 12 x 50 Class 4 screws are recommended for fixing pierced metal sheeting to timber or metal battens.
Self drilling hex head fasteners with neoprene sealing washers are manufactored from high tensile steel with Colorbond durable coatings. Roofing screws should be driven through square with the surface of the sheeting to provide a complete seal around the screw hole.
Please do not over tighten the Tek screws, as this can damage the sealing washer and roof sheeting. The ends of corrugated roofing and close pitched trapezoidal roofing sheets should be fixed through the side lap and every second crest after that. Most metal roofing projects use a inch O. Keeping this in mind, I have calculated a simple formula below that you can use to determine how many screws you need to purchase.
If you are using different screw lines than the inch ones, you might have to adjust to the calculations that I have given below. To determine how many screws you need to purchase for every square of your metal roof, you can apply a very simple formula. For every hundred square feet, you need to get eighty screws. If your roof specification is in sq. Instead of sq. You will need five screws for every square meter of metal roofing.
A simple way to remember how many Panel side lap screws you will need is to divide the sq. In the above example, you can divide sq.
Screw line spacing varies with the underlying layer on top of which you are installing the metal roof. Let me explain more here:. While ideally, you should always consult with an engineer on screw spacing over a wood substrate, in practicality, this will rarely happen. Most people usually opt for a inch on-center installation of screw lines. Some might vary this by opting for 18 inch and inch versions.
Here it would be best if you went with the word of an engineer. They will look into a load chart and decide the right spacing for you. Once spacing is clear, you can attach each panel to each line of the metal purlins.
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