Roofing company near me in Northbrook
A roof is more than just shingles—it’s a complex system made up of multiple layers, each playing a crucial role in protecting your home. Whether you’re building a new roof or replacing an old one, understanding these layers helps ensure durability, efficiency, and long-term performance. As a trusted roofing company near me in Northbrook, we break down the key components of a properly installed roofing system.
The Layers of a Roofing System Explained 1. Roof Deck (Sheathing)
The foundation of every roofing system is the roof deck, usually made of plywood or oriented strand board (OSB). This layer provides a solid base for the rest of the roofing materials and connects to the structural framing of the house.
🔹 Purpose: Supports the entire roofing system and ensures structural integrity.
🔹 Common Issues: If moisture seeps in, the decking can rot, leading to sagging or collapse.
2. Underlayment
Placed directly on the roof deck, the underlayment acts as a protective barrier against water infiltration. There are two main types:
- Felt Underlayment – A traditional option made from asphalt-saturated material.
- Synthetic Underlayment – More durable and water-resistant, often preferred by modern roofing companies.
🔹 Purpose: Protects against water penetration, ice dams, and wind-driven rain.
🔹 Common Issues: Torn or improperly installed underlayment can allow moisture to seep through.
3. Ice & Water Shield
This specialized waterproof membrane is installed in areas prone to water pooling, such as valleys, eaves, and around chimneys.
🔹 Purpose: Adds extra protection against leaks, especially in colder climates where ice dams form.
🔹 Common Issues: Not using it in critical areas can lead to leaks and interior water damage.
4. Drip Edge
A drip edge is a metal strip installed along the edges of the roof to guide water away from the fascia and prevent rot.
🔹 Purpose: Prevents water from seeping under the shingles and protects the roof’s edges.
🔹 Common Issues: Missing or improperly installed drip edges can lead to water damage.
5. Roofing Shingles (or Roofing Material)
The most visible part of the roof, shingles come in different materials such as:
- Asphalt shingles (most common)
- Metal roofing (long-lasting and energy-efficient)
- Tile or slate (premium durability and style)
🔹 Purpose: Provides the primary defense against weather elements.
🔹 Common Issues: Cracked, missing, or curling shingles can compromise the roof’s effectiveness.
6. Flashing
Flashing is made of metal and installed around roof penetrations like chimneys, vents, and skylights to prevent water leaks.
🔹 Purpose: Directs water away from joints and potential weak spots.
🔹 Common Issues: Rusted or improperly sealed flashing can lead to leaks.
7. Ridge Vents & Ventilation System
Proper ventilation is essential to keep the attic temperature balanced and prevent moisture buildup. Ridge vents, soffit vents, and gable vents work together to allow airflow.
🔹 Purpose: Prevents mold, reduces heat buildup, and extends the life of the roofing materials.
🔹 Common Issues: Poor ventilation can cause excessive heat in summer and condensation in winter.
A well-structured roofing system consists of multiple layers working together to protect your home. If you’re planning a new installation or need a roof replacement, partnering with a professional roofing company ensures every layer is installed correctly for maximum durability and efficiency.