Roofs are a crucial component of your house. Roofs protect the house and the family throughout the year. They have a sturdy design to withstand different climatic conditions. Roofs can withstand the rainy season, winter snow, storms, and summer heat. Roofs offer significant structural support to the house.

The roofs can work efficiently when you hire experts for proper installation and ensure regular maintenance. With appropriate installation, there is a guarantee of the functionality offered by the roofs. Most of the roofing issues occur because of installation mistakes. Most often, homeowners do not have complete knowledge of the roof installation process.

Being informed of the roof installation mistakes will help in avoiding them.

Here is the list of roof installation mistakes that you should avoid at any cost.

#1 Inappropriate Flashing Installation:

Flashing is an essential component of the roofing system.

It prevents the rainwater, and snowfall to enter the roof underlayment.

Flashing is the bridge between the joints and valleys of the roof.

Flashing plays a vital role in preventing water leak issues on the roof.

If there are complications while installing flashing, it will lead to water leaks within a year or two.

Moreover, you should ensure the quality of the flashing.

Low-quality flashing cannot withstand the changing climate and cause various roofing issues.

If the roofing contractors make mistakes while installing flashing. It can cause severe damage to the structural integrity of the roof.

#2 Improper Ventilation Installation:


Ventilation is prominent to avoid humidity inside the roofs.

Ventilation ensures the proper flow of the air in the roof system.

With cross ventilation, you can prevent roof damage and extend the life of roofs. It keeps the underlayment dry and healthy.

Improper installation of ventilation causes severe issues in the roof.

If the roof absorbs excess moistness, it will cause condensation. Due to condensation, there is a risk of mold/mildew growth. The wood of the roof underlayment starts to decay.

#3 Installation Mistake While Installing Gutter, Downspout:

installation mistakes

Every homeowner knows the functions of gutter in the roofing system.

Gutters are responsible for collecting the rainwater, melting snow, and directing them downward. It s a way to remove the water from the roof surface and keep it clean and dry.

If the gutter does not function efficiently, collected water will leak from the channel.

It will penetrate the walls/ceiling of the house.

Most often, when the gutter installation is improper such issues happen.

Improper installation will cause damage to the exterior structure of the residence.

Mold/mildew will grow if the wall and ceiling do not dry.

#4 No Leak Barrier And Drip Edge On The Roofs:

Leak barriers are an essential part of the roofing system. Sometimes, the contractors forget to install it on the roof.

Leak barriers have the responsibility to prevent water leaks and protect the building.

Moreover, the leak barrier will protect the fascia of the roof from rotting down due to water.

The leak barriers will impart strength to the vulnerable sections of the roof and prevent water leaks in the house.

If you do not install leak barriers, nothing can stop the rainwater and snow penetrate the walls and ceiling.

#5 Use Of Mismatched Shingles:

It is the biggest mistake that you make while installing roofs. You should not use mismatched shingles.

When you get shingles from different manufacturers, they will have different shapes, colors, and materials. Ensure that you choose shingles from a reputed manufacturer of the same type. Besides this, you should ensure the overall quality of the shingles. Most often the contractors offer low-quality shingles to cut down the cost. But never do this mistake. Low-quality shingles will not withstand severe climatic conditions. Moreover, getting different shingles will destroy the efficiency and curb appeal of the house.

#6 Avoid Using Defective Nails:

Another mistake that contractors make while roof installation is using defective nails.

Check the quality of the nails before fixing them on the roof.

Defective nails will come off during heavy rainfall, or thunderstorm.

Such nails cannot provide proper strength to the roofs. It will also damage the roof underlayment.


The roof is the first line of protection you have over the house. It aims to shield you from adverse climatic conditions. If you want the roofs to efficiently work, then focus on the installation process. If the installation is proper, you will not experience any roof damage. Besides, it will need frequent repair work. While installing, you can avoid these mistakes and keep the roofs in healthy condition. If you have any kind of confusion still, then you can approach Arko Exterior in Minnesota for the best advice.