Tuesday, February 13, 2024
HomeMetalWhere To Screw Down Metal Roofing

Where To Screw Down Metal Roofing

How To Screw Down Ribbed Metal Roofing

Standing Seam Metal Roofing Vs Corrugated Screw Down Metal Roof – Big Differences between the Two

For this, you would probably want to use a cordless drill with a clutch unit, which can tighten the fastener without overdoing it. When using the drill, you should set it based on the type of wood you will be using. On a purlin, I would suggest using a twelve or thirteen.

When overlapping the panel, you should make sure that your over-flap is going over the under-flap, which has the drain channel. Both should be at the same height.

Now, you can put the metal roof screws on the rib or flat. Both are acceptable, and both have their pros and cons. If youre going into the flat, I suggest using a one-inch or a one-and-a-half-inch screw, but when you go through the rib, you should use a two-inch or a two-and-a-half-inch screw.

You can keep the washer slightly tight when going into the flat so that it fits nicely on the sheet. Remember not to overtighten otherwise, you will put too much pressure on it, and it might break. When youre putting a screw in the rib, remember never to tighten it too much because it will damage the rib.

How To Remove Metal Shavings From The Roof

Swarf is the metal shavings and chips that are caused by cutting and drilling roof panels. These fragments tend to rust quickly if they are not removed from the roof in a timely manner. Leaving swarf on the panels after drilling will cause red corrosion spots to form and permanently stain the roof. This can and does happeneven overnight.

Watch Our Youtube Channel To See Videos About Installing Metal Roofing

Installing a metal roof can be simple with the right knowledge and resources.. If you watch the videos in this blog you will not have any problems. If you are learning about fastening metal roofing panels then the next step is to learn about trim and flashing.A great starting point is to view our install guides or visit our YouTube Channel

Recommended Reading: How Much To Repair Garage Roof

Screw Line Spacing For Metal Roofing Over Metal Purlins

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.

Incorrect Fastening Of Screws


This over-tightening will make the washer expand, and if you continue to put too much pressure, the washer is liable to break.

If you see this happening, the right thing to do is to back up a little. Let the washer come back slightly into its original shape and leave it there.

The other thing that happens is that sometimes we get too cautious and do not tighten the screw as much as we should. You can see this happening if you spin your screw and find that the washer is spinning without a fuss. A spinning washer indicates a loose screw, and you should make sure to tighten it.

Read Also: Do Home Inspectors Go On The Roof

Bend Trim Ends Closed

  • Before you install the trim, cut and bend the leading end to wrap it around the corner. Make a series of one-inch cuts with aviation snips at each bend to create tabs. Fold the tabs in with a hand seamer to meet a wall or a corner, or to close a gap created by the trim. Each trim is a different shape, requiring unique cuts and bends.
  • Install the eave trim tight to the fascia and fasten it to the roof deck over the underlayment with one-inch roofing nails. In warmer climates, the eave is attached before the underlayment. In northern Wisconsin, where ice dams are common, we install these atop the underlayment to protect the entire roof from dams.

What Are The Correct Drill Speed Setting To Install A Metal Roof

When you decide to screw down a metal roof it’s important that you have the screw gun set to the correct drill speed settings. Always match the speed of the drill to the substrate or screw type.

  • Use a 2,500 RPM screw gun for wood and steel substrates that are less than 1/4-inch thick
  • Use a 2,000 RPM screw gun for steel substrates that are 1/4-inch thick and heavier
  • Use a 1,000 RPM to 2,000 RPM screw gun for 304 stainless steel screws

Don’t Miss: How Much Does Tesla Solar Roof Cost

What Is The Correct Screw Pattern And Spacing For R

The screw placement for R-Panelis straight forward. The screws are located in the same location for both metal roofing and metal siding applications. One item of importance is that you will have additional screws at the ends of the panels. This lessens the likelihood of strong winds ripping the panels off of your building.

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. This is blown up larger and shown in the diagram as detail AA. You must attach a panel screw in this exact location. In addition, there are lap screws that are connected at 12 to 18 on center and butyl tape seal, which is the same thing as mastic tape.

The screw placement for 7.2 Panel and Western Rib is simple. Panel screws are located in every panel low. There will be five panel screws and one lap screw per screw line. Lap screws are connected at 12 to 18 on center and butyl tape seal is used at the panel sidelap.

How Long Will Your New Metal Roof Actually Last

Screw Down Metal Roofs – Are they worth it?

Now you know how the two types of metal roofs compare to each other on key factors. This helps you decide which one is right for your situation.

But there’s still one more factor we didn’t discuss, a metal roof’s lifespan. Because lifespan is the return you get out of your metal roof investment, we wrote another article breaking it down for you.

Since 1990, the team at Bill Ragan Roofing has been installing residential metal roof systems for homeowners in the Nashville are.Whether its installing your new roof, regular maintenance, or roof repairs you can count on us to do the job right.

Check out this article on How Long Your Metal Roof Should Last to learn how much life you get out of your metal roof investment.

Recommended Reading: Does Homeowners Insurance Cover Roof Damage From Wind

Seal The Leaking Metal Roof:

Undoubtedly, metal roofs are durable and long-lasting only if you have installed them correctly. Excitingly! You dont need to maintain this material regularly because of its incredible infrastructure and properties. For sure, you can give your home a stylish and magical appearance with a metal roof. The best thing is that you can choose this roofing material in any shape, size and texture of your choice.

Even if this material is highly durable, it will damage over time without a proper sealant. The main reason behind the damages for this type of roofing is environmental changes. Metal sheets will contract in the winter season and expand in the summer.

This contraction or expansion may create cracks in the sheets. For this, you have to fix the cracks immediately with the help of an appropriate sealant. You can seal the leaking roof yourself or also with the help of professionals. It all depends on the leakage condition and also your budget. In this way, you can save the metal roof from vulnerable damages in the future.

Lets begin fixing the leakage or rusting issues with proper sealing of metal roofs:

Advantages Of Exposed Fastener Metal Roofing

LESS EXPENSIVE One of the most significant benefits to choosing exposed fastener metal roofing is that its less expensive, especially when compared to standing seam systems. There are many reasons for the lower price, including:

  • Wider panels
  • Fewer metal panels need to be purchased.
  • Less labor is needed because the wider panels cover the roof faster.
  • Thinner gauge panels
  • Lower quality paint systems
  • Polyesters and silicone-modified polyester paint systems are popular choices for exposed fastener because theyre less expensive than the polyvinylidene fluoride paints typically used on standing seam systems.
  • Less accessories purchase
  • Exposed fastener systems are directly fastened down to the structure through the metal, so theres not a necessity to buy any kinds of clips. This can save on costs for the buyer.
  • Exposed fastener systems usually use less accessories and different flashing products, like foam closures, to install the roof system. Again, this cuts down on costs and speeds up the installation.
  • NO SEAMING REQUIRED Exposed fastener systems do not require hand or mechanical seaming the two panels. Most systems use a lap seam where the edges of each panel overlap the one adjacent to it and are then fastened down together at the same time. This is often why exposed fastener metal roofing tends to be considered the less labor-intensive option when compared to standing seam metal roofing.

    Also Check: How To Clean Solar Roof Panels

    How Often Do You Have To Replace Screws On A Metal Roof

    Depending on what kind of paint is used on the steel or aluminum panels will determine what kind of warranty you get on a screw down metal roof system. Properly installed with no maintenance, you could get 20 years out of your screw down panel roof. With periodic maintenance, you could possibly stretch it to 30 years.

    Exposed Fastener Metal Roofing


    Exposed fastener metal roofing is defined as a roofing system where the panels are fastened to the structure through the face of the metal and directly into the roof deck or framing below. The panel edges lap one another, and the fastener goes through both layers of metal. Its called exposed fastener because the head of the fastener is visible and not hidden by a seam. An exposed fastener system is typically considered the economical choice of metal roofing and is classically used on residential, structural, industrial, and agricultural buildings.

    Recommended Reading: Does Choice Home Warranty Cover Roof

    Apply Metal Roofing Base Coat:

    Even a minor gap is more than enough to damage the metal roof. Therefore, you need to deal with the gaps immediately to fix and seal the roof appropriately. For this, you have to clean the roof from any debris, dust and rustic material.

    Once you have cleaned the roof thoroughly, its time to apply a metal base coat on each metal panel. It will help to prevent the penetration of water from the gaps efficiently. Make sure to cover the gaps with the glass fabric after applying the first coat of sealant. Later, you are all set to apply the urethane cement on the glass fabric-covered panels.

    Appropriate Screws Installation Is A Key To Successful Metal Roofing:

    Well, people are considering the installation of metal roofs because of several reasons. The main reason is that this type of roofing requires low maintenance. Moreover, the durability and life span of this material are more than others. If you think about adding the solar panels or system, it would be a great option to add it on the metal roof to reflect more light with better Sun exposure.

    If you want to keep the metal roofing long-lasting and durable, you have to install it appropriately. Without the proper anchoring of screws, its impossible to place the metal strips and sheets properly.

    However, the installation and addition of screws depend on the type of metal sheets. There are different kinds of screws such as metal, wood and lap screws used to tight the metal sheets on the roof.

    If you dont handle the screws and put them according to the type of metal, the chances for moisture intrusion and damages are high. Unfortunately, the replacement of the metal roofing will surely cost you more than professional installing of screws. Now, the decision is yours.

    Recommended Reading: How To Sell Roofing Jobs

    Do The Screws Go In The Ribs Or In The Flats

    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. Screws-in-the-flat fans counter by arguing that screws placed in the rib dont create proper gasket compression, due to the presence of a void under the rib. Another potential problem with screwing into the rib is that it presents a higher risk of the screw pulling out during a wind event.

    Roofing Options: Choosing Between A Standing Seam Roof And A Screw Down Roof

    BPC Feature Series Episode 3: Screw Down Metal Roofing

    In our previous blog post, we discussed the difference between a through-fastened system and a concealed-fastened system. But where do standing seam roofs and screw down roofs come into play? What are the features of each? Lets explore Heritages product offerings on standing seam roofs and screw down roofs to better help you decide what roof is the right choice for your metal building.

    Recommended Reading: Do Metal Roofs Affect Cell Phones

    Pros And Cons Of Screw Down

    Given its nature, screw-down metal roofing is cheaper than that with a standing seam. It is also quicker to apply, saving you on labor costs. The disadvantages arise in terms of maintenance as this type of roofing is more likely to experience problems due to age. Screws are exposed which makes it more likely that a leak will occur in the future. The potential for neoprene washers to fall out or fasteners to get rusty increases the chances of leak. Additionally, the fasteners tend to back out eventually since the metal will expand and contract as temperatures fluctuate.

    There are numerous other advantages to screw-down metal roofs, including the fact that it is more common, making it easier to find a contractor with the skills to install it. Installation is also nice and easy since there is no need to seam two panels together. As far as screw-down metal roofs, this comes from the use of wider panels, thinner gauge panels, and fewer accessories to purchase.

    Exposed Screws Vs No Exposed Screws

    Probably the easiest and most easy way to understand comparison between standing seam and barn metal is the screws. Pole barn metal gets attached to a structure by installing screws directly through the face of the metal into the wood substrate. The result is exposed screws in lines across the entire roof two feet on center. It requires roughly 70 screws per sq of roofing to attach screw down metal. That quickly adds to between 2,000 and 3,000 screws on an average sized home of 1,800 sq. ft. in size. The screws rely on a rubber washer to seal water out of the roof. In order for the rubber washer to work correctly, the screws must be installed at a 90 degree angle with the roof pitch and must not be over tightened nor under tightened. But even when all 2,000 plus screws are installed correctly the rubber washer rarely last more than 12-14 years at best with many roof screws failing as early as year 7. One other huge issue with the screws is that the type of structure designed to use pole barn metal have 2 x4 purling that the screw goes into. The 2 x 4 provides enough “meat” for the screw to bite into solidly, but most home and wood framed businesses have 1/2 plywood or OSB boards for roof so the screws don’t get the bite they need to stay put.

    Also Check: How To Fix A Leaking Roof

    Disadvantages Of Standing Seam Metal Roofing

    HIGHER COST One of the most significant drawbacks to standing seam metal roofing is the fact that is can be more expensive when compared to other metal roofing types, especially exposed fastener systems. However, its not always the highest price, as metal shingles and other stamped metal materials tend to come in at a higher price, even though stamped materials are often made from 26 gauge or thinner substrates.

    LESS QUALIFIED CONTRACTORS AVAILABLE Finding a contractor who is qualified, skilled, and experienced in metal roof installation is crucial, especially because standing seam systems require careful craftsmanship. Since standing seam installations may be considered too complicated or tedious, there are far fewer contractors to choose from who have a proven track record and the relevant experience.

    LABOR-INTENSIVE INSTALLATION PROCESS For exposed fastener systems, its a relatively simple process of putting the material on the roof deck and nailing/screwing it down. For standing seam, its much more complex and labor-intensive, and may include:

    NOT FOR USE ON A FLAT ROOFING STRUCTURE Standing seam systems are not suitable for buildings or homes that have a roof below a .5/12 pitch . These flatter pitches do not allow water to adequately drain, which could lead to premature degradation, color changes, and the overall failure of the panel system. Furthermore, snap-lock systems should not be installed below a 3/12 pitch.


    Most Popular