What benefits go along with choosing a metal roof? Shingles may still be more popular, but metal is much more durable and requires significantly less maintenance. Metal also reflects away more solar radiation, which can help to save you some money on air conditioning costs.
While the metal itself used in many roofing products is incredibly durable, a real key to metal roofing longevity is in how the roofing is installed in the first place. The biggest source of potential problems where corrugated metal roofing is concerned has to do not so much with the metal itself, but with the screws or fasteners. Depending upon the design of your metal roof, it can potentially require thousands of screw and fastener sites and seams.
This could include lap screws, metal to wood screws, metal to metal screws, sealing tape areas, etc. Each of these sites is a potential source of moisture intrusion, if not handled correctly.
One of the most common errors revolves around overtightening or under-tightening the screw fasteners. Most err on the side of overtightening. The tighter the screw, the more secure it must be, right?
Unfortunately, no. The problem with this approach is that it overcompresses the washer and creates too much stress. This will cause the washer to fail prematurely, or worse, you could break the washer right from the start.
Overcompressed or broken washers can easily result in leaks. Another common issue to avoid is putting screws in at an angle. Sometimes folks can get in a hurry there are thousands of screws to fasten, after all! Every angled screw then becomes a potential leak site for your metal roof, which is no bueno. Depending upon which installer you ask, you could end up getting some different answers to this question. But the fact of the matter is that the screws used for attaching metal roofing are self-drilling screws, so it could be argued that you never really need to pre-drill your holes.
However, you can also overcome this issue by using wooden panels for fastening under the metal strips. On the other hand, according to the fastener spacing, self-tapping screws are super easy to sink inside the metal panels. However, it still depends on the type and design of metal strips you use for the roofing. Above all, the placement and installation of screws in the metal roofing are easy if you do it rightly. Hopefully, you will put the screws to the metal roof efficiently after reading this post.
Home Improvement Roofing. Harley Pecker. Final Verdict: Above all, the placement and installation of screws in the metal roofing are easy if you do it rightly. Share 0. Tweet 0. Pin it 0. Related Posts. Home Improvement Lawn. Is it true that buying new lawn equipment outside of the season saves you money?
Read More. Home Improvement Cleaning. Basements are another living space in your home, but many people avoid them due to dusty concrete floors…. Roof jacks provide a steady work area, making roofing installation easier and safer. There will be five panel screws and one lap screw per screw line at the panel ends. The remaining interior panels will have three panel screws and one lap screw at each screw line. Pay close attention to the diagram above in which the top left is circled.
You must attach a panel screw in this exact location. Screw Location For 7. The screw placement for 7. Panel screws are located in every panel low. Figuring out how the correct distance from screw line to screw line is an easy process.
It will depend upon whether the metal roofing is installed over a solid wood substrate or over metal purlins. Each of these conditions will lead to different distances between the screw lines. After you have your screw line spacing it will be simple to determine how many screws to purchase. When you are trying to determine screw line spacing you have to realize that each job is different.
Some jobs are located in areas that have high winds while others may be located in snow country or a desert. For this reason the spacing between screw lines should be determined by the engineer. However, this rarely happens. In the real world the homeowner or installer chooses a distance without consulting an engineer. C if further. When in doubt more attachment is better than less attachment.
This will depend upon the type of panel that is used and the thickness of the steel. An engineer will use a load chart in order to determine the spacing between metal purlins.
Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins. If the purlins are really close it might be possible to attach the metal sheeting at every other purlin. However, that would be a decision for the engineer. The single biggest cause of leaks on a metal roof is due to incorrect fastener installation. Once you learn about screw placement we recommend that you learn how to install the fasteners correctly.
Your roof will have thousands of screw penetrations and watching this video is the best thing that you can do to prevent roof leaks. If you prefer to read about installation of metal roofing fasteners we wrote you an article:.
Screw placement for metal roofing and siding panels is easy.
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