What's the Typical Cause of a Rippled Roof?

Whether you've got an old or new roof, there's a risk it would start rippling after a few years – sometimes even during just the first month. A rippled roof can look really strange and lower your property's value and aesthetic appeal. Why does this happen?

In today's post, we'll learn the primary causes of a rippled roof and the best ways to fix them, according to reliable local roofing company Miller's Home Improvement.

Poor Attic Ventilation

Imagine your roof as an oven with vents that let heat escape from it. You might ask where this heat comes from – well, if you've turned on the heater almost everyday, your home is generating heat that exists through the roof (remember that hot air is lighter than cold air).

If it has nowhere to escape, your roof becomes a literal oven with zero vents; like a balloon filled with hot air. It will keep pushing up, exerting pressure until the sheathing and your asphalt shingles buckle and cause the rippling, wavy appearance your roof might currently have.

Improper Installation

Let's say you have proper attic ventilation and everything's in order – why is your roof still wavy? Another reason is improper installation, especially if you did the process by yourself or with the help of an unlicensed and uncertified roofing company. 

Asphalt shingle manufacturing companies have specialized certification programs that ensure the roofers that install their roofs know what they're doing and have the right equipment and experience to achieve a top-notch installation. If you're not working with a certified roofer, your roof might be nailed or layered wrong, causing the shingles to push upon each other when it's hot and they expand.

Underlayment Problems

Think of your roof sheathing like a tray of small cakes. If the tray was rippled, the cakes couldn't stay in one place. In fact, they might look rippled and wavy like damaged roofs. The underlayment or roof sheathing can make your roof appear unnatural if it becomes old, suffers from water damage, or was installed improperly.

The best way to fix it is to have a tear-off roof replacement, a process that involves removing all your old roofing materials to inspect the sheathing and rafters (or trusses – we'll get to that later). Once your roofer deems the sheathing too old and requires replacement, they can do this process before installing your new asphalt shingles to extend its lifespan and performance.

If you have a rippled roof that needs fixing, you can always trust us at Miller's Home Improvement to help with all your needs. We're a contractor with decades of experience and knowledge fixing roofs in your neighborhood. Many HOAs trust us for our compliance and reliably consistent quality of work. Call us today.

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