Roof crickets are essential components in modern roofing systems, designed to prevent water accumulation and ensure proper drainage. This article will delve into the materials used for constructing roof crickets, their importance, types, installation processes, and maintenance tips. By the end, you will have a comprehensive understanding of the best materials and practices for building effective roof crickets.
What is a Roof Cricket?
Definition and Purpose
A roof cricket is a small, peaked structure built on the high side of a chimney or other roof projections to divert water around the obstruction. Its primary purpose is to prevent water pooling and ensure that rainwater flows towards the gutters or downspouts, thereby reducing the risk of leaks and structural damage.
Importance of Roof Crickets
Roof crickets are crucial in extending the lifespan of a roof by preventing water damage. By directing water away from vulnerable areas, they help maintain the integrity of the roofing system, prevent leaks, and reduce maintenance costs.
Materials Used for Roof Crickets
Wood
Plywood
Plywood is a common material for constructing the base structure of roof crickets. It is strong, durable, and relatively inexpensive. Plywood sheets can be easily cut and shaped to fit the specific dimensions of the roof cricket.
- Advantages: Easy to work with, cost-effective, widely available.
- Disadvantages: Susceptible to water damage if not properly sealed and protected.
Metal
Galvanized Steel
Galvanized steel is often used for the outer shell of roof crickets due to its durability and resistance to corrosion. It provides a sturdy protective layer that shields the underlying wood structure from moisture.
- Advantages: Highly durable, resistant to rust and corrosion, low maintenance.
- Disadvantages: Heavier than other materials, can be more expensive.
Aluminum
Aluminum is another popular choice for roof cricket construction. It is lightweight, resistant to rust, and easy to shape and install.
- Advantages: Lightweight, rust-resistant, easy to work with.
- Disadvantages: Can be less durable than galvanized steel, more prone to denting.
Asphalt Shingles
Asphalt shingles are often used to cover roof crickets, especially when the surrounding roof is also shingled. They provide a seamless appearance and effective water protection.
- Advantages: Cost-effective, easy to install, matches existing shingles.
- Disadvantages: Shorter lifespan compared to metal options, can be damaged by severe weather.
EPDM Rubber
EPDM (ethylene propylene diene monomer) rubber is a synthetic rubber membrane commonly used for flat roofs and roof crickets. It is highly flexible, weather-resistant, and durable.
- Advantages: Excellent waterproofing, long lifespan, resistant to UV radiation and extreme temperatures.
- Disadvantages: Can be more expensive than traditional materials, requires professional installation.
Copper
Copper is a premium material for roof crickets, known for its longevity and aesthetic appeal. Over time, copper develops a patina that enhances its appearance and provides additional protection against corrosion.
- Advantages: Extremely durable, attractive patina over time, low maintenance.
- Disadvantages: High initial cost, requires skilled installation.
Types of Roof Crickets
Simple Crickets
Simple crickets are basic triangular structures designed to divert water around a chimney or other roof penetration. They are typically constructed from plywood and covered with shingles or metal.
Complex Crickets
Complex crickets may involve multiple angles and surfaces to accommodate larger or more irregularly shaped obstructions. These crickets often require more precise construction and higher-quality materials to ensure effective water diversion.
Installation Process
Planning and Design
Proper planning and design are critical for the effective performance of a roof cricket. The size, shape, and slope of the cricket must be carefully calculated to ensure optimal water diversion. Consulting with a professional roofer or architect can help achieve the best results.
Building the Structure
- Measure and Cut: Measure the area around the obstruction and cut plywood sheets to form the base structure of the cricket.
- Assemble: Assemble the plywood pieces to create the peaked structure, ensuring all joints are secure and angles are correct.
- Attach to Roof: Secure the cricket to the roof, making sure it is properly aligned and firmly attached.
Covering the Cricket
- Install Underlayment: Apply a waterproof underlayment to the surface of the cricket to provide an additional layer of protection.
- Attach Covering Material: Depending on the chosen material, attach shingles, metal, or EPDM rubber to the cricket. Ensure all seams and edges are sealed to prevent water infiltration.
Sealing and Flashing
Proper sealing and flashing are essential to prevent leaks. Install flashing around the base of the cricket and any adjoining roof surfaces to ensure a watertight seal. Use high-quality sealant to close any gaps and protect against moisture.
Maintenance Tips
Regular Inspections
Regularly inspect roof crickets for signs of damage, wear, or leaks. Pay particular attention to the seams, edges, and flashing. Early detection of issues can prevent costly repairs.
Cleaning and Debris Removal
Keep the roof and crickets free of debris, such as leaves, branches, and dirt. Accumulated debris can trap moisture and lead to water damage or block proper drainage.
Repairing Damage
Promptly repair any damage to the roof cricket, including cracked shingles, rusted metal, or deteriorated sealant. Addressing small issues quickly can prevent more extensive damage in the future.
