Metal Roofing Installation – A Simple Guide To A Difficult Task

The actual process of metal roofing installation begins far before the first brick is laid or the first shingle lifted out of the bundle. Preparing for metal roofing installation involves taking safety precautions, measuring the roof, deciding what roofing panels to use and installing the roofing underlayment.

After this, you’ll have to assemble the tools and roofing materials you will require for metal roofing installation. Only after this does the actual process of installing a metal roof begin. In this report, we’ll talk about the actual installation process, including some special installation methods which differ from the commonly used alternatives.

Accessories for metal roofing installation such as skylights or chimney construction will not be covered, as it is highly unlikely that a do-it-yourself home owner will find it interesting – and professionals would have learned it from peers and experience already!

DIY Metal Roofing Installation

The basics involve making some assumptions about the kind of roof you plan to install. A simple gable roof on a residential building is the model on which we will discuss this process. With modification, the same principles can be adapted to other kinds of roofing.

A drip edge needs to be installed first. This is simple, yet cahllenging to a beginner. All existing drip edges and rotting materials must be removed before installing your new roof. You can place your drip edge under or above the underlayment. There are benefits to doing it both ways, such as lessening the chance of damp and moisture collecting after rains, and safety considerations. Also, if the size is larger than the roof, trimming it may be difficult later on.

And ultimately it makes little if any difference by way of performance. Metal roofing will prevent water seeping through, and only what condensation happens on the underlayment is an issue. If rainwater does manage to seep through to the underlayment after your metal roofing installation, then you have a serious problem on your hands.

Your drip edge will be installed with screws or 8″ nails in a staggered fashion. Be sure to aim for higher rigidity by overlapping the edges by two inches or more. Drip edges must also be installed over the eaves.

For metal roofing installation, your supplier plays an important role by delivering trim of specifications that you choose. Standard trim that your supplier stocks may not be suitable for your needs, so be sure to state your requirements, even supporting them with a rough drawing of the kind of roof you are going to install. A little planning will save you endless worry down the line.

Gable or Rake Trim Installation

You have a choice when it comes to trimming your roof gables. You can use a special gable trim or a regular drip edge. You can install the gable trim at the beginning or end of your metal roofing installation. By bending up an inch or so of the outside edge of your panel, you’ll create a hok to hang your gable trim from. You could also achieve the same result by cutting and folding the double lock panel.

Don’t worry if it doesn’t look pretty, as the gable will cover this up. With longer panels, creating this can be tough work. Run some measurements to make sure things are just right. Otherwise you may end up with a panel that butts out by a couple of inches, destroying the aesthetics of your metal roofing installation. Now hook your gable into the lock, pull it down, and screw it together using a gasket made of rubber.

Metal Roofing Installation – Roof Panels and Field Panels

The first panel of your metal roof is the most important, as it sets the tone for the rest of the project and the overall appearance of your finished roof. You should take special care that the penetrations are not lined up with the lock, as that will cause problems while installing flashing.

Create the hook lock starting from the bottom of a panel. A tiny ‘ear’ that projects out can be wrapped and crimped around the edge after installing the roof panel. Making sure that your roof panel is correctly aligned with the rake board before screwing it into place will ensure that the standing seam metal roofing installation is secure and attractive.

Place clips at intervals of 10 to 12 inches and take care to avoid denting the metal roofing panels. Depending on the underlayment, select the number of screws to avoid splitting the board. After the first panel is snapped into place, follow it up with the other panels while pushing each panel as far up as you can before locking it into place. It’s best to use a rubber mallet to thump the panels into place than using your hands. Repeat the process until all sides of the building are covered.

Installing Ridge Caps

Never install a ridge vent system on a low slope roof as the risk of water seeping through is high. The same goes for ridge caps which should keep your metal roofing installation waterproof and secure. After all z-bars are in place, you are ready for the ridge cap to be installed. Bend it into shape, align it with the panels on both sides, and hook the locks into the opposing z-bars before crimping on the ridge cap itself. Apply caulking where the connection with other pieces will be, without using screws. This will make the seal watertight.

Hopefully this short guide is of some value with your metal roofing installation. Remember that this is not a ‘how to’ guide and that you are responsible for any risks you take, consequences you experience, or injuries you sustain due to lack of care and safety. Do not rely on this information for anything except general information about the topic of metal roofing installation and contact a professional contractor for specific advice about roofing your home or building.



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