6 Common Roofing Mistakes to Avoid During Roof Installation

Your roof provides proper ventilation, insulation, and protection against rain, snow, hail, and other elements. This is why installing a new one or receiving a roof replacement is a worthwhile investment. However, you fail to make the most of this investment if you choose to DIY or work with an inexperienced roofing contractor. To make sure you get your money’s worth, here are six of the most common roofing mistakes to avoid:

Ignoring the Manufacturer’s Guidelines

Some roofers who have been in the industry for many years consider themselves experts on roofing. For this reason, they tend to ignore the manufacturers’ instructions. These directions usually appear as small print on the packaging of the equipment. 

Reading and following this important information may seem tedious, but doing this is necessary to prevent improper installation and decrease the risk of roof damage. In addition, it ensures the materials are handled properly and protects the warranty from being voided.

Not Considering the Slope of the Roof

Many amateur roofers and DIY homeowners commonly assume that what works on one roof will apply to all roofs. However, that is not always the case since the materials used in roofing depend on the slope of the roof. For example, higher slopes need tiles and roof shingles, while roll roofing is appropriate for lower slopes. This compatibility with the right material for the slope of the roof is crucial to prevent water damage.

Not Installing a Drip Edge

A drip edge sends water away from the walls of your house, directs them into the gutter, and prevents rain from seeping into your roof. Failing to install it can cause water to end up under your shingles and cause damage.

Unfortunately, many homeowners prefer not to add this to their roofs to cut down their expenses. Although it saves money in the short term, it can result in expensive repairs in the future. This is why sacrificing quality workmanship and safety is not worth the risk.

Not Adding an Underlayment

Applying new roofing directly to the wooden deck of the roof after removing the existing tiles or shingles speeds up the roof installation process. However, this decreases the lifespan of the roof and its ability to protect your home. For this reason, it’s best to apply a layer of underlayment, providing a water-resistant barrier for the roof before adding any new roofing materials.

Having Poor Shingle Alignment

Poor shingle alignment is a sign of a poor roofing job. The shingles are misaligned if they are not vertical, or the joins are on different horizontal planes, making your roof look sloppy. Besides turning your home’s exteriors unappealing, this issue can create gaps in your roof and result in water damage. 

Failing to Prevent Ice Dams 

If you are living somewhere with a cold climate, ice damming is common. This takes place when the snow melts but refreezes on your roof. When this happens, your shingles get pulled up. To avoid these ice dams in the future, make sure to add an adhesive barrier to cover the edge of your roof during its installation. 


Roof installation should never be a DIY project. It requires the expertise of professionals with the right equipment and years of experience under their belt. Choosing to do DIY or hiring inexperienced contractors means running the risk of injury and paying for more expensive costs in the long run. For this reason, it’s advisable to work with the best roofers for your roofing project.

If you are looking for a trusted and reliable roofing company in Vermont we are the right team to call. Our experts at Three Mountain Roofing are an Owens Corning Platinum Preferred Contractor and certified installer, so you are assured we can address your roofing needs. Request a free inspection today!

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