12 Things to Know About Metal Roofing

12 Things to Know About Metal Roofing

Metal roofing is now mainstream. It’s a viable option for almost all homes, except those with flat roof pitches. Metal roofs don’t all look like metal. Metal roofing products made from shingle are virtually indistinguishable to traditional asphalt shingle roofs. Here are 12 facts to help you understand the benefits of metal roofing in London.

Metal Roofs are Not Just a Unique Design

Metal roofing used to be only found on architect-designed, high-end homes. This is no longer the case. Metal roofing can be found in traditional houses thanks to increased availability and better manufacturing processes. According to statistics from the industry, metal roofing market share increased by about three percent per year over a few years. About 15% of all roofing installations were made with metal roofing materials in 2017. The market share of asphalt shingle roofing decreased at the same time. It accounted for around 59 percent in total roofing installations.

Metal roofing can be installed over existing roofs

If your local building codes permit, metal roofs can be placed over existing roofs without having to remove shingles. Although shingle removal is the best option, it is more expensive and can be messy.

This type of installation can pose a problem because trapped water vapor could build up. Moisture can get trapped between metal roofing and older roofing. This can lead to mold and rot. Roofers can vent a metal roof to eliminate this possibility. You can also install the new metal roofing on furring strips (1x3s or similar), which will raise the metal and create a ventilation air pocket between layers.

Before installing a metal roof directly on top of old shingles, make sure you consult the local building codes. Some areas may require a complete tear-off when a new roof has been installed.

Metal Roofs Are No Noisier Than Asphalt Roofing

Metal roofing is not louder than other types of roofing, despite the common belief that they are noisy in rain and hail. Metal roofing is usually installed on a solid substrate. The attic and insulation act as a sound barrier. The metal roof will not cause any sound problems in the interior of your home.

Metal Roofing Does Not Attract Lightning

A metal roof might seem to attract lightning. However, statistics and facts do not support this belief. According to the Metal Construction Association’s technical bulletin, metal roofing does not increase the chance of lightning strikes. 2 Metal roofing is less likely to be ignited than other roofing materials like wood shakes and shingles if it is struck by lightning.

According to the bulletin, metal roofing is an electrical conductor as well as a noncombustible substance. This makes it one of the most desired constructions. “2

Metal roofs are not attracted to lighting because lighting seeks a path from ground. This is why telephone poles and trees attract lightning. Metal roofs have no direct route to ground because they are structurally isolated. There is no scientific reason to lighten a metal roof more than an asphalt shingle roof.

Metal roofing can be more cost-effective

Metal roofing products are typically covered by warranties that are comparable to asphalt shingles for up to 30 years. However, in practice metal roofs can last 50 years and more. State Farm Insurance statistics show that metal roofs last between 40 and 70 years. 3 Homeowners are unlikely to have more than one metal roofing system over the course of their lives.

A homeowner will replace an asphalt roof shingle roof at least twice over the course of a 50-year span. A homeowner will likely replace an asphalt shingle roof two or three times over the course of 50 years.


Insurance companies might also offer lower rates for homeowners with metal roofs, especially in areas where hail or wildfire is a possibility. This further reduces overall costs.

Metal roofing is impervious to fire, rot, and insect damage

Metal roofing is almost fireproof, which is one of its main advantages. Metal roofing is becoming the preferred roofing material in many areas of the country due to the increasing dangers of wildfire. Not only that, but also:

  • Metal roofing is not something termites or other insects can eat.
  • Metal roofing is resistant to mildew and rot.
  • Because it absorbs heat rapidly from the sun, snow is more easily removed than conventional roofing.

Metal roofs are more energy-efficient

According to industry studies, metal roofs reflect solar radiation heat which can lower cooling costs by up to 10 to 25% in climates with high cooling costs. A shiny or granular coating on a metal roof can increase its reflective power and help reduce energy consumption.

Metal Roofing can be used on roofs with low slopes

Metal roofing is often thought to be only suitable for steep-slope roofs. However, standing seam metal roofing can be used on flat roofs. This roofing material is made up of large sheets that have seams that are raised to resist water. Although some slope is required to prevent water runoff, most homes can still accept metal roofing.

Severe hail can ruin metal roofing

Metal roofs are more durable than asphalt shingles, and require less maintenance than other types of roofing. However, they are still susceptible to damage. Large hail is a particular weather condition that can make metal roofing unsuitable. When hailstones reach golf-ball size, aluminum and copper can be vulnerable to denting.

Steel is more durable and can withstand hailstorms better than steel, but be aware that you may live in an area where this type of hail can happen. Hailstones that are larger than a dime or pea-sized can cause damage to metal roofs.

Large hail can also cause damage to asphalt shingle roofs. If you have adequate homeowner’s insurance, it is no reason to not install metal roofing.

Installation and repair usually require a professional

Although DIYers can install and repair metal roofing, it is not recommended. Metal roofing can only be purchased through a few retailers. The techniques for installing and repairing it require specialized skills. Metal roofing is a specialty that you will need to call if problems arise. Metal roofs are very resistant to such problems.

Ridge Vents are more obvious

Attic venting can be found on most homes today. It is done by a continuous roof vent that runs along the peak of the roof. This continuous ridge vent (CRV), which is made of shingle-like material, runs along the roof’s peak. It covers outflow holes at the sides and ends of the ridge. This CRV is something you have probably seen many times but never noticed. It usually lies flat and blends perfectly into the surrounding roof.

The CRV, which is metal on many metal roofs, particularly standing-seam roofs is noticeable more because it is also visible. Metal roofs have ridges or thick lines that are distinctive and add to their unique look.

Metal roofs can be recycled

Metal roofs can last a long time, but they are easy to recycle. The landfills will usually accept old asphalt roofing.