Roofing Installation – Where to Start and What to Consider

February 20, 2024

roof contractors working on new roof with sunset in the background

*Updated August 19th, 2025

Roof Guide: Repair or Replace Your Roof

Your roof is one of the most critical components of your home, safeguarding it from the elements and maintaining its structural integrity. A solid roof protects against water damage, mold growth, and insulation problems that can affect your home’s energy efficiency and overall comfort. However, roofs have a limited lifespan, and wear and tear are inevitable over time.

While some roofing issues can be resolved with simple repairs, there are times when a full roof installation or new roof installation is the best option to ensure your home remains safe and secure. Deciding whether to repair or replace your roof requires a clear understanding of your roof’s current condition, the costs involved, and the long-term benefits of each option. Here’s a comprehensive guide to help you evaluate your needs and make the right decision for your home.

Should You Repair or Replace Your Roof?

Deciding whether to repair or replace your roof is a significant choice, as the average roofing project costs around $9,052. However, the total expense can vary based on factors like roofing material, location, and whether the old roof needs to be removed.

You don’t want to replace your roof too soon and waste resources, but delaying replacement could jeopardize your home’s structural integrity. To help you make the right decision, here are key factors to consider when determining if a roof replacement or roof installation is necessary.

1. The Roof’s Age

Knowing your roof’s age will tell you if it needs replacing. If you’re at the end of the roof’s life, it’s better to replace your roof than repair it. Each type of roof has a different lifespan, and different brands may vary too.

For instance, asphalt shingles usually last around 20 years, but a metal roof can last much longer, sometimes up to 50 years.

2. Water Damage

Sometimes a roof’s damage is so extensive that you have water damage in your attic and on ceilings. If water damage goes undetected too long, it can compromise the roof deck and overall roof system. Inspecting your roof for leaks and potential water damage can help determine if it’s a simple repair or if the entire roof needs replacement.

3. Damaged Shingles

Damaged shingles don’t automatically mean you need a new roof, but they could be a warning sign. A licensed roofing contractor can determine if only a few shingles are used need repairing or if replacing the entire roof is safer and more cost-effective.

4. Damaged Flashing

If your flashing around the roof penetrations is damaged, minor repairs may suffice. But extensive wear could mean it’s time for a new roof installation. Correct step flashing and installing the flashing properly helps prevent water from seeping beneath shingles and causing interior damage.

5. Mold Growth

If a roofing contractor notices mold on shingles, it could indicate serious water issues inside your home. Often, removing old roofing materials, treating mold, and completing a roof installation is necessary for long-term safety.

6. Sagging

A sagging roof signals that the roof deck may be rotting. This requires a complete roof replacement or install a roof project to ensure structural stability.

7. Energy Efficiency

An old or damaged roof can impact energy efficiency. Upgrading with a metal roof or well-insulated asphalt roof improves ventilation and reduces heating and cooling costs.

8. Frequent Repairs

If you’re constantly fixing shingles or leaks, the cumulative cost may exceed a full roof replacement. A roofing contractor can help determine whether an installation project is a smarter investment.

9. Local Weather Conditions

Climate affects roofing materials. Frequent storms, heavy snow, or extreme heat can accelerate wear. Metal roofing and metal siding work well in areas with snow or high winds, while asphalt shingles are ideal in moderate climates.

10. Roofing Material Compatibility

If your home has been remodeled, your current roofing material may no longer suit your needs. A roof installation with updated roofing material can enhance functionality and aesthetics.

11. Resale Value and Curb Appeal

Replacing an outdated roof with a metal roof or asphalt shingle roof improves curb appeal and home value, making your home more attractive to buyers.

12. Inspection Results

A professional roof inspection uncovers hidden issues. If a roofing contractor identifies multiple problems, a roof replacement may be the safest solution.

Types of Roofing to Consider

When it’s time for a new roof installation, you have several roofing materials to choose from:

  • Asphalt Shingles – Affordable, common, and suitable for most climates. Works well with Owens Corning Roofing and other brands.

  • Metal Roofs – Long-lasting, low-maintenance, and ideal for residential roofs exposed to snow or wind. Learn how to install metal roofing properly for durability.

  • Slate Roofs – Extremely durable, waterproof, but heavy and costly.

  • Clay Tiles – Heat-resistant and ideal for hot, humid climates. Requires reinforced roof deck.

Roofing Considerations Based on Climate

  • Humid or Cold Weather – Asphalt shingles resist buckling and deterioration.

  • Extreme Hot or Cold Weather – Metal roofing reflects heat in summer and sheds snow in winter. Learn how to install metal roofing for optimal performance.

  • Non-Humid Areas – Wood shingles or shakes can be strong options.

  • Hot and Humid Areas – Clay tiles are durable and energy-efficient.

Questions to Ask Your Contractor

Choosing a roofing contractor is critical. Here’s what to ask:

  1. Personal Questions – Experience, licensing, insurance, and local office presence.

  2. Crew Questions – Training, insurance, and hiring practices.

  3. Past Work – Local jobs, reviews, and references.

  4. Project Questions – Timeline, permits, protection of home, hauling old roofing materials, warranties, and solar considerations.

FAQ

What goes on a roof first? – The framing must be solid. Depending on your roofing material, you may layer shingles along existing layers.

What is the cheapest roof to install? – Asphalt shingles are the most affordable.

What kind of roof lasts the longest? – Slate, metal roof, or clay tiles depending on climate.

Final Thoughts

Choosing a roof repair or roof replacement is a big decision. Ensure your roof installation is performed by professional roofing experts who know your area and local building requirements. Selecting the right roofing material—whether asphalt shingles or a metal roof—ensures durability, aesthetic appeal, and long-term protection for your home.

Additional Roofing Resources