Category: Metal Roof Installations

Metal Roof Installation Done The Right Way

wooden building with modern architectural metal roof

With every year that passes, a growing number of homeowners choose metal for their roofing. Thanks to average durability of 40-50 years, energy savings, and minimal maintenance cost, there is no other roofing material that measures up against a metal roof structure for your commercial or residential building.

Similar to any construction project, you may have some questions and concerns regarding the roof application procedure. Don’t worry, we’ll cover the most common ones in this report.

A key factor to consider when you get a new standing seam metal roof is to hire an established expert with skills and experience in applying metal roofs. Similar to typical shingle roofs, improper installations and lower quality work can result in functional and aesthetic problems.

A roofing expert with proven qualifications and skills in metal roofing installation will be able to help you pick the right roofing structure for your home and pocket.

Finding a skilled and reputable roofing expert is equally important to select the most suitable material for your new metal roof.

After speaking with and hiring your roofing expert, they will be able to address any questions you may have in regards to the roofing procedure. Meanwhile, here are some basic considerations to note during the application of a new metal roof.

Metal Roof Set-Up Ways

Installations of metal roofs are split into two categories: new constructions and retrofit. In the first case, the application of metal roof layers takes place when the building skeleton is finished. Very often, the general contractor expects the roof application because the shell should be waterproof and the internal polishing phase can start.


In the case of retrofit work, your roofing expert has 2 main choices: to recover or overlay the roof or detach and replace it completely. The first option keeps the current roof untouched and prevents the need and expense of detaching and removing the previous roof and its secondary parts.

Keep in mind that in some cases, the recovery/overlay method is not a suitable choice and your roofing expert may suggest the method of full replacement. There are several factors involved in making this decision but there are a couple of common reasons why this option is preferred.

Local construction standards often determine if a removal/replacement job is necessary. Most local authorities will let you recover installations for one or two current shingle layers. If the number of shingle layers is more than that, the current roof will have to be detached completely.

Also, if there is widespread leakage occurring in the current roof which results in impaired wood decking, the entire roof will have to be detached and replaced. You may ask your metal roofing expert to perform a thorough check and look for signs of water leakage.

In most cases, the less damage your existing roof shows, the quicker your roofing project will finish and the lower the cost will be.

Metal Roof Installation Units

The following are the main units used in the application of a new roof.


This refers to the element that is used to shield the joists and rafters such as planks, plywood, or OSB boards. This is attached over the roof structuring compartments to generate a roof layer for underlayment and metal layer application.


The majority of contractors use artificial underlayments which provide several perms compared to felt papering ( an older version of underlayment). Synthetic underlayments are also quicker to set up, provide better durability, and can be exposed to climate settings for longer.

Metal Roof Panels

Metal roof panels come in several sizes and shade options to choose from and for every home style and pocket. Your metal roofing provider or expert can help you decide which is the best choice for your needs.

Closures & Clips

Based on the kind of metal panel you choose, your roofing expert will utilize closures and clips to apple the roof panels to the decking layer.

Flashing & Trim

Flashing & trim is about the compartments that are applied at the areas and edges of the metal roofing structure to shield the roof and stop water from getting into the roofing structure and building lines.

Adhesives & Caulking

Butyl tapes and sealing agents are applied to metal intersections e.g. laps or junctions that link to panels.
The adhesive must stick to the painted metal layers and offer some elasticity for motion as the metal stretches and/or shrinks with the shifting climate conditions.


Can You Apply Metal Over A Shingle Roofing? 

In nearly all cases, YES, it is possible to install a new metal roof layer over a current shingle roof. That is a valid reason why it is increasing in popularity. Its application doesn’t require the entire detachment of your current roof, which is often costly and time-consuming.

Metal, although pretty robust and solid is quite lightweight, weighing less than 1 pound/sq.ft. It’s almost 4X less heavy compared to asphalt shingles which weigh 4 pounds/sq.ft. Plus, adding a metal roof over current shingles doesn’t remarkably raise the total burden that the home’s structure needs to hold.

Besides leading to cost savings (as it doesn’t need the entire detachment of the current roof), the installation of a new metal roof on top of an existing one also provides extra insulation over your house to stop the escape of heat and humidity.

When it comes to insulation, it’s noteworthy to mention that metal roofs are blockers of heat. They block and repel heat away from their exterior instead of absorbing it. That means the additional insulation layer will not serve as a heat blocker for heat emittance through your metal roofing.

Important Considerations When Applying A Metal Roof Above Shingles

close up of metal roof shingleWhat we have previously mentioned about the application of metal above shingles applies to most roofing procedures. However, if you are unsure, it’s best to consult your local construction and zoning authorities to ensure that metal-over-shingle applications are acceptable.

In case your shingle roof shows leakage, you’ll have to check it for decayed rafters or sheets. These issues should be resolved immediately before the application of the new roofing.

In case the existing roof’s burden has led to structural issues e.g. decking, these problems have to be tackled before the beginning of the new roof application.

It’s also typically a great idea to add some kind of underlayer over the shingles to prevent their granules from touching the metal and result in damage. You may ask your roofing expert for more info on suitable options for your case.

Advantages of solid metal roofs

Once you set up your new metal roof over a current shingle one, you will instantly save some cash that would otherwise be spared to detach an existing roof entirely. But, this isn’t the only benefit of a metal roof. Here are 4 other benefits:

  1. Longevity. A rightly applied metal roof can last up to 50 years before it needs replacement.
  2. High resistance to damage. Metal roofs can tolerate most extreme weather conditions such as heavy winds, rainfall, or ice and hail storms.
  3. Minimal maintenance. Due to their strength, metal roofs won’t need frequent and often costly fixing work. They can keep their strength through several years.
  4. Lower utility charges. As mentioned previously, special layerings on metal roofs enable to repel heat instead of absorbing it. This leads to less reliance on AC units to cool down interior temperatures during the hot summer season.