How to Install Metal Roof Over Shingles

In the US, there are billions of square feet of commercial and industrial roofing applications. A large portion of them needs repair. Building owners can extend the lifespan of their new roof and save the expense of a roof tear-off by having roof contractor Pasadena install metal roofing over existing shingles.

In this blog, you will learn a complete mechanism of how to install metal roofs over shingles. So read it out till the end for the best information!

Why Install Metal Roofing Over Shingles?

• Maintenance Requirement:

Although shingles are a less expensive roofing option, they need regular maintenance and repair. As a result, many business owners just become weary of the ongoing costs, clutter, and disruption to their daily operations. Building owners have an alternative to the cycle of shingle replacement with metal roofing.

• Cost Difference:

Although metal roofing typically costs more upfront than new shingles, it can survive for more than 50 years with little upkeep. (That is easily two to three times longer than the lifespan of a shingle roof) Because metal roofs are available in a wide range of designs and colors, they help improve a building's structural appeal.

In contrast, any costs associated with tearing off existing shingles, including disposal fees, are entirely avoided when installing a metal roof over them. You also benefit from all the advantages of a metal roof.

• Eco-Friendly Alternative:

Aside from its durability and aesthetic appeal, metal roofing is 100% recyclable. Therefore, it isn't easy to find a more environmentally friendly roofing alternative than metal roof panels for building owners who want to be responsible. Because landfills and trash management businesses receive so many shingles, they frequently demand a high cost to take them. Shingles are also infrequently recycled.

Metal Roofing Over Existing Shingles Options

Once you've decided to stop replacing your shingles regularly and switch to metal panels, it's time to choose the precise installation technique you want to employ. For roof repair in Long Beach, you can contact professional roofing companies to help you safely replace your shingles with metal roofs.

When installing metal roofing over shingles that already exist, there are a few basic methods. Let's look at the most common.

Metal Panel Attachment into Furring or Lathing Strips

In this case, the original roof's furring strips are made of wood and linked to the building below using sub-girts or wood purlins. This framing system can be applied over existing decking or underlayment as well as over already-installed shingles or underlayment. Then the roofing professional needs to connect the framework system to the new metal roof panels.

There are several variations to the furring strip technique. In comparison to a thorough tear-off, this method often leaves less mess.

The final cost may be comparable to tear-off due to the furring material and installation costs. However, the fact that the shingles are still in place makes it unquestionably more environmentally friendly. This method does add weight to the roofing system. Therefore, it's essential to make sure whether the building can handle the extra weight.

It's crucial to keep in mind when employing this strategy that the copper components in pressure-treated wood may aggressively attack metal panels. Therefore, you should install a barrier of synthetic underlayment between the wood framing and metal panels if you use pressure-treated lumber for furring applications.

Metal Panel Attachment Directly into Shingles

Attaching metal panels directly through the shingles and into the wood deck below is one of the most affordable installation techniques. Inconsistencies in the deck and shingles can be seen through the metal panels, even though this method avoids the expense and work of furring strips since steel frequently acts as a mirror.

This condition is primarily cosmetic and has no bearing on the panel's function. Homeowners who place a high value on aesthetics may benefit more from a remove-and-replace strategy.

The direct attachment strategy has a few extra factors to take into account. First, this installation approach makes it difficult to achieve Above Sheathing Ventilation (ASV). ASV is essential for lowering energy usage.

As a result, even though this strategy frequently delivers the most affordable installation, it also gives lessened energy savings.

Second, it's crucial to remember that direct attachment projects need a barrier between the old shingles and the new metal roof. This layer of protection is essential to stop the metal panels from being worn through by the shingles as they expand and contract throughout the roof's lifespan. Synthetic underlayment and even thin foil-faced insulation are examples of typical barrier goods.

Shingle Recover Systems

Utilizing a proprietary Shingle Recover System is a third recovery strategy. The cost and labor associated with the furring strip method stated earlier are not necessary with this solution. The clip design also makes the system look its best. ASV, or an Above Sheathing Ventilation airspace, is also provided, which aids owners in maximizing energy savings.

The panels in this arrangement are additionally symmetrical. The majority of other standing seam panel varieties, on the other hand, are asymmetrical.

Symmetrical systems can be set up and taken down in any chronological order. Asymmetrical designs, however, must be installed in a specific way (commonly left to right). The same laborious left-to-right operation is necessary should maintenance or replacement of the roof on an asymmetrical system become necessary during its lifespan. In reality, while working with asymmetrical-style roof panels, it's common to be obliged to remove perfectly good panels to access those that need to be fixed or replaced. When this happens, symmetrical panel systems may produce scrap and repair costs that are much greater than expected.

Contractors can begin the repair or replacement at the particular area of trouble with symmetrical systems, making a repair or replacement straightforward.

The Bottom Line:

We have discussed the three possible options for how you can install the metal roof over shingles in this blog. This blog has helped you choose the best option for your roofing needs. Once you have decided which option you will choose, call the professionals for roof replacement in Downey.