A Step-by-Step Guide to Roof Installation for Maryland Homes
Roof Installation
February 13, 2025

A new roof is one of the most important investments for your home. It protects against the elements, improves energy efficiency, and enhances the overall look of your property. Whether you’re replacing an aging roof or building a new home, understanding the roof installation process can help you feel more confident about your project.

At ALP Roofing, we’ve spent years helping Maryland homeowners with high-quality roof installation services. Our team of skilled professionals follows a careful process to make sure your new roof is installed properly and built to last.

Preparing for a Roof Installation

Every successful roofing project starts with preparation. Before a single shingle is installed, we assess the condition of the existing roof, remove damaged materials, and lay the foundation for the new structure.

Checking the Condition of the Existing Roof

Before installing a new roof, we check for common signs of damage such as missing shingles, leaks, or soft spots. Water stains in the attic, sagging rooflines, or worn-out flashing around chimneys and vents can indicate structural problems that need attention before installation begins.

Maryland’s weather, from humid summers to winter snowstorms, can accelerate roof wear. That’s why we always check for storm damage, hidden leaks, or weakened decking before moving forward.

Gathering the Right Materials

Using high-quality materials is just as important as skilled workmanship. At ALP Roofing, we install top-grade asphalt shingles, durable synthetic underlayment, and strong flashing to protect against water damage. We also make sure all nails, sealants, and ventilation components meet industry standards.

The roofing system is more than just shingles. It includes several layers, all of which play a role in keeping your home protected. Along with the shingles, we use a reliable moisture barrier and proper ventilation systems to help regulate attic temperatures and prevent condensation buildup.

Once the site is prepped and materials are ready, we move on to the removal of the old roof.

Removing the Old Roof

A new roof starts with a clean slate. That means removing old shingles, underlayment, and flashing while keeping the underlying structure intact.

Stripping Away Old Materials

We begin at the highest point and work our way down, carefully removing shingles and flashing while clearing away nails and debris. If the plywood sheathing underneath is still solid, it can remain in place. However, if any boards show signs of rot or damage, we replace them to create a strong base for the new roof.

Once the old materials are removed, we sweep the surface and prepare it for the next stage.

Installing Underlayment and Flashing

Before the shingles go on, we install protective layers that keep moisture out and help extend the life of the roof.

Applying the Underlayment

Underlayment is rolled out in sections to create a water-resistant barrier between the decking and shingles. We overlap each layer to keep water from seeping through, adding an extra layer of protection against heavy rain or melting snow.

For many Maryland homes, we use synthetic underlayment because of its strength and resistance to tearing. It holds up well during extreme weather and provides better overall protection than traditional felt paper.

Adding Ice and Water Shield

Some areas of a roof are more vulnerable to leaks, such as valleys, eaves, and sections around chimneys or skylights. In these areas, many roofing professionals apply a specialized moisture barrier to prevent water from seeping beneath the shingles. This is especially helpful in Maryland, where winter ice dams can cause moisture to back up under the roof.

At ALP Roofing, we assess each roof individually and recommend solutions based on the home’s specific needs. For homeowners concerned about water damage, we discuss whether installing an ice and water shield is the right choice for their home.

Once these layers are in place, we’re ready to install the new roofing material.

Roof Installation

Installing the New Roof

Shingle installation is where your new roof takes shape. Each row is carefully placed, nailed, and sealed to protect against wind, rain, and sun exposure.

Laying the First Row

We start by installing a row of starter shingles along the edges of the roof. These shingles help guide water off the roof and provide a secure base for the main layers.

With a chalk line as a guide, we begin placing the full-sized shingles in a staggered pattern. This layout helps prevent water from seeping between the seams and improves overall coverage.

Securing the Ridge Caps and Flashing

Once the shingles are in place, we install ridge caps along the peak of the roof. These specially designed shingles provide a finished look while allowing for proper ventilation. Good airflow helps regulate attic temperatures and prevents moisture buildup that could lead to mold or wood rot.

Flashing is the final step, sealing vulnerable areas around chimneys, vents, and roof joints. This added protection directs water away from these areas, reducing the risk of leaks.

Proper installation of ridge caps and flashing is critical to keeping the roof watertight. That’s why we take extra care during this stage to make sure everything is fastened securely.

Final Inspection and Cleanup

Once the last shingle is nailed down, we do a thorough inspection to confirm that every detail meets our standards. This includes:

  • Checking for proper shingle alignment and nail placement
  • Making sure all flashing is sealed properly
  • Confirming that ventilation components are working as expected

Finally, we clean up the job site, removing old materials, stray nails, and debris. We leave your property looking just as clean as it was before we started—except now, with a brand-new, professionally installed roof.

Why Professional Roof Installation Matters

Some homeowners may consider handling a roof installation on their own, but without professional experience, mistakes can lead to costly problems. A roof isn’t just about laying down shingles—it requires knowledge of structural integrity, ventilation, and water drainage.

At ALP Roofing, we take pride in our craftsmanship and only use high-quality materials. Our team understands the challenges Maryland’s climate presents and installs roofs designed to handle everything from summer heat to winter storms.

When homeowners trust a professional team, they get a roof that lasts longer, protects better, and adds value to their home.

Get Expert Roof Installation in Maryland

If you’re considering a new roof, ALP Roofing is ready to help. From the initial inspection to the final nail, our team makes the process as smooth and stress-free as possible.

Reach out online or Call (410) 600-ROOF today for a free quote.

Let’s protect your home with a professionally installed roof that stands the test of time!

Roof Installation FAQs

How long does a roof installation take?

The timeline for a roof installation depends on the size of the home, the type of roofing material, and weather conditions. Most roof installations take between one to three days, but more complex projects or unpredictable weather can extend the process.

Do I need to be home during the roof installation?

You don’t need to be home during the roof installation, but it can be helpful to be available for any questions or updates. Our team at ALP Roofing keeps homeowners informed throughout the process, ensuring a smooth and hassle-free experience.

Can I install a new roof over my old one?

While some homeowners consider layering new shingles over an old roof to save money, it’s not always the best choice. A complete roof installation provides a stronger foundation and helps prevent underlying issues from going unnoticed. Removing the old roof allows us to check for damage and make any necessary repairs before installing the new materials.

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