Home Home How to Install Metal Roofing Over Plywood – Ultimate Guide

How to Install Metal Roofing Over Plywood – Ultimate Guide

The new, improved technology and the advancement in building techniques have increased the use of metal roofing, including rooftop decking.

Also, green construction programs and initiatives are responsible for the increased popularity of metal roofing. In case your house doesn’t have these metal proofings, you can install them yourself. It is easy to install on plywood as well.

If you like to DIY, you must try this, or you can always seek expert help. There are metal roofing contractors that provide the services of installing metal roofs. Suppose you are doing it by yourself. You must follow specific steps and procedures. The article will give the insight to know the step-by-step process.

Aluminum, steel, copper, zinc, etc., are some of the metal roofing options. Thus, you have the option to select the kind that suits your property the best. Due to its ability to reflect some of the sun’s rays, metal roofing can lower your cooling costs. They are long-lasting, strong, simple to maintain, and cost-efficient.

The Applications Of Metal Roofing

The U.S. market for metal roofing systems is expanding and is currently worth $3.3 billion in residential and commercial properties. Manufacturers are providing consumers with much more options to achieve the desired look and utility. Metal roofing can be done for the following projects and constructions

  • Residential buildings
  • Commercial buildings
  • Finsutrial projects
  • Factories
  • Any other architectures

Why Consider Doing Metal Roofing

Here are a few benefits that you will have if you consider metal roofing for your house or commercial projects.

●  They Are Safer For The Environment

Metal roofs are completely recyclable . therefore, they are considered an environment-friendly option. Instead of completely replacing the tops, they can frequently be resealed to increase their lifespan. Furthermore, it’s unlikely that they will end up in a dump after they are no longer needed because of the character of their components.

●  They Are Considered A Cost-Effective Option

Compared to conventional asphalt roofs, metal roofs are much more durable. Therefore, the costs of changing and replacing them are much reduced.

●  They Are Fire Resistant

Metal roofing can withstand a variety of circumstances and doesn’t have the risk of dangerous moisture accumulation. Additionally, it resists fire. Therefore, even though a significant hailstorm could cause minor damage, it’ll be significantly resistant to harsh weather conditions.

●  You Can Install It On The Existing Roof

One of the most significant advantages of these roofs is that they can be directly installed on the existing ceilings that you have. By having a new roof installed directly over an existing roof, you might be able to reduce the cost of the installation. This process significantly reduces the price of labor.

A Step-By-Step Guide To Installing Metal Roofs Over The Wooden Roofs

Installing the new roofs directly is simple, but you need to consider doing it with the proper steps.

●  Selecting The Right Metal

It can be confusing to select the best type of metal. There are many choices, and every metal has different qualities. Making the decision would be perplexing, but you need to consider the weather conditions, requirements, and budget before finalizing the metal.

●  Preparing And Inspecting The Plywood

If you are building your new roof over the existing one, it is very crucial that you first inspect the wood. It should not be damaged and be sturdy. The plywood should be able to take the new roofs. Thus there should not be any shattered or crumbling wood pieces. Make sure to remove all the rotten plywood parts. Otherwise, they risk harming the newly installed roofing panels. After that, hammer all of the outer nails into place. After that, take out any pipes or vents that are not needed.

●  Setting Up And Arranging The Protective Sheets

The next step is to install slip sheets over the felt layers. Firstly spread the felt over the plywood’s surface and Make sure to cover the entire roof. The underlayment is to be cut according to the roof’s measurements. After that, hammer the roofing nails into the surface.

Now, lay the slip sheets upon the felt and nail it to the roof’s edge.

●  Installing Gutters

At this point, the gutters need to be installed. You have the option of various PVC pipes for the downpipe. Make sure to use the perfect size gutters and install them using nails. Now that the roofing felt is in place, drip edges or continuous flashing can be installed. Again, you need to cut them according to the measurements of the roof.

●  Installing The Metal Panels

You should take care of some minute details when installing roofs. The panels can now be installed. Draw a chalk line starting at the bottom of the. It must be at 1/4 inch from the edge of the shaft and vertical. The line needs to be perpendicular to the eave. Install, Beginning from the left side and then moving toward the right. Start putting in the first metal panel at the base of the roof. Check the intervals of screws on the panels while installing.

When installing a panel, fix the left side rib of the next panel to the last rib of the already installed panel. Similarly, follow this method to install all the remaining panels. You will have to do this until you cover the entire ceiling.

●  Attaching Ridges

Finally, you will have to install the metal ridges surrounding the roof. In addition, you have to place rubber pipes alongside the vent pipelines.


Metal roofs are the best option if you see the overall advantages. They can be chosen according to the weather and are best suited for harsh conditions. Most importantly, they are environment-friendly and thus contribute to sustainable development projects. You may think installing the metal roofing would mean removing the existing one and then doing it again. But that is not the case. You can easily install the new roofs over your existing plywood roof.

The detailed and step-by-step guide to the process of installing metal panels and the entire roofing system has been mentioned above in the article. You can either hire professionals for the installation, or you can do it yourself if it is for your house.