The term roof cricket refers to a small peaked structure installed on roofs to divert water and prevent pooling near chimneys, valleys, and low spots. This article explains why roof crickets matter, the common materials and designs, installation basics, maintenance tips, costs, and code considerations for U.S. homeowners and roofing professionals.
| Topic | Key Point |
|---|---|
| Definition | Small peaked saddle that directs water around roof penetrations |
| Main Materials | Roofing paper, shingles, metal flashing, plywood |
| Common Locations | Behind chimneys, at roof-to-roof joints, valley ends |
| Benefits | Prevents leaks, reduces ice dams, protects flashing |
What Is A Roof Cricket And Why It Matters
A roof cricket is a ridge-shaped, framed addition built up behind obstructions on a roof to split and channel water flow away from vulnerable areas. It is essential for preventing water pooling, accelerating drainage, and protecting flashing installations where two roof planes meet or where a roof meets a vertical element.
Common Locations For Roof Crickets
Roof crickets are typically installed behind chimneys, at hips and valleys where water tends to concentrate, over skylight corners, and where a higher roof meets a lower roof. Any roof penetration or valley with potential for water accumulation is a candidate for a cricket.
Types Of Roof Crickets
Straight (Single Slope) Cricket
A straight or single-slope cricket diverts water with a simple, one-directional slope. It suits smaller obstructions and locations where only one side needs diversion. It is the easiest and least expensive type to build.
Tapered (Dual Slope) Cricket
Tapered crickets create a ridge and slope water to both sides, resembling a small roof peak. They are preferred behind chimneys on larger roofs because they split flow evenly and reduce direct pressure on flashing. Tapered crickets offer superior drainage for larger obstructions.
Integrated Versus Add-On Crickets
Some crickets are integrated into the roof during original construction, while others are added later during repairs or upgrades. Integrated crickets generally deliver a better long-term seal and roofline continuity.
Materials Used For Roof Crickets
Common cricket materials include exterior-grade plywood for framing, underlayment such as roofing felt or synthetic layers, metal flashing (copper, galvanized steel, or aluminum), and shingles or metal panels to match the surrounding roof. Material choices affect durability, waterproofing, and overall cost.
Design Considerations And Slope Recommendations
Cricket slope should be compatible with the existing roof pitch; standard practice is to maintain a slope at least half the main roof pitch or a minimum 1:12 slope, though steeper is often better. A properly pitched cricket avoids back-pooling and reduces ice dam risk.
Flashing And Waterproofing Details
Effective flashing integration is critical. Flashing must be lapped under the upper roof shingle and over the cricket underlayment toward the lower roof plane. Counterflashing and step flashing around chimneys and vertical surfaces prevent water from tracking behind the cricket. Proper flashing is the most important factor in a cricket’s long-term performance.
Building Code And Best Practice Notes
Local building codes may not always list crickets explicitly, but codes requiring weatherproofing of roof penetrations effectively mandate appropriate drainage solutions. Best practice follows manufacturer guidelines for underlayment and flashing, and uses approved construction-grade materials that meet local wind and fire ratings. Consult local code officials or a licensed roofer before significant modifications.
Installation Overview
Installation steps include: cutting and installing a plywood saddle to the required shape, securing underlayment over the saddle, integrating metal flashing into the existing roof system, and applying shingles or metal cap to match roof finish. Fastening patterns, adhesive, and sealant choices should align with manufacturer instructions. Professional installation reduces the chance of leaks from poor detailing.
DIY Versus Professional Installation
Small, simple crickets can be DIY projects for experienced homeowners comfortable on roofs, but most work is best left to licensed roofers because of the technical flashing and code compliance involved. Improperly installed crickets can create new leak paths and cost more to fix than hiring a pro initially.
Common Problems And How To Avoid Them
- Poor flashing integration: Always interweave flashing under the upper roof’s underlayment and over the cricket membrane.
- Inadequate slope: Maintain sufficient pitch to prevent standing water.
- Material mismatch: Use compatible metals to avoid galvanic corrosion.
- Poor shingles alignment: Match shingles to avoid weak points at seams.
Addressing these issues during installation prevents premature failure and leaks.
Maintenance And Inspection Tips
Inspect crickets annually and after severe storms. Check for debris buildup, damaged flashing, loose shingles, and signs of water staining in the attic or on ceilings. Clean valleys and cricket areas of leaves and branches to maintain unobstructed drainage. Early detection of problems extends roof life and prevents costly interior damage.
How Roof Crickets Help Against Ice Dams
In cold climates, crickets reduce ice dam formation by preventing snowmelt from pooling behind chimneys and roof intersections where refreezing occurs. Proper insulation and ventilation combined with a well-designed cricket minimize temperature differentials that lead to ice buildup. Crickets are one component of a broader ice-dam prevention strategy.
Cost Factors And Typical Price Ranges
Costs vary based on cricket size, complexity, materials, roof pitch, and local labor rates. Simple crickets can start around a few hundred dollars, while larger tapered crickets with premium materials and flashing can exceed $1,000–$2,000. Obtaining multiple bids and ensuring line-item detail for materials and flashing helps compare values accurately.
When A Cricket Might Not Be Necessary
Some modern roof designs and flashing systems channel water effectively without a cricket. Low-risk, elevated penetrations or architectural chimneys with continuous counterflashing may not need one. A professional assessment determines if a cricket is the best solution. Not every roof penetration requires a cricket, but many do for long-term waterproofing.
Examples Of Real-World Applications
Historic homes with masonry chimneys often gain significant protection from added crickets when roofs are replaced. Commercial facilities with rooftop equipment curbs use custom metal crickets to direct runoff. Both residential and commercial applications show measurable reductions in leaks after cricket installation.
Choosing The Right Contractor
Select a licensed roofer with experience installing crickets and integrating complex flashing. Request references, photos of prior work, and detailed warranties covering both labor and materials. Confirm the contractor carries liability and workers’ compensation insurance. Clear contract terms and documented warranties protect the owner and ensure quality workmanship.
Frequently Asked Questions About Roof Crickets
Do All Chimneys Need A Cricket?
Not all chimneys require crickets; size, roof pitch, and existing flashing determine need. Larger chimneys and roofs with significant runoff typically benefit from a cricket. An inspection will clarify necessity.
How Long Does A Cricket Last?
With quality materials and proper installation, a cricket can last as long as the surrounding roof—often 20 to 50 years depending on material and climate. Regular maintenance preserves longevity.
Can A Cricket Be Retrofitted?
Yes, crickets can be retrofitted during roof repairs or replacements, although retrofits require careful flashing integration to avoid leaks. Retrofitting is a common and effective solution.
Key Takeaways For Homeowners And Professionals
Roof crickets are a small but crucial detail for effective roof drainage and protection against leaks. Proper design, materials, flashing, and slope are essential to their performance. Consultation with a qualified roofer and adherence to best practices ensures that a cricket delivers long-term value and peace of mind.