Best 3/8 Furring Strips for Siding Ventilation
Finding the right 3/8 furring strips helps promote drainage and airflow behind painted or cladding materials, reducing moisture-related issues. This guide compares five grounding options designed for different siding types and climates, helping builders and homeowners choose the best fit. The top picks cover rainscreen ventilation, durability, and ease of installation for various project needs.
| Product | Best For | Key Advantage |
|---|---|---|
| Cor-A-Vent Sturdi-Strips | Rainscreen installations behind wood, fiber cement, or hardboard siding | Built-in drainage and airflow with insect protection |
| Quarrix ProTect 1 1/2″ x 5/16″ | Smaller profiles for tighter exterior walls | Durable, warp- and mold-resistant |
| Quarrix ProTect 3″ x 1/2″ | Wide, robust backing for larger gaps | Strong and breathable behind cladding |
| Quarrix ProTect 3″ x 3/4″ | Heavily ventilated, high-moisture environments | Wide strip with excellent airflow |
| Watairvent 8 ft. Black | Dual-channel drainage and cross-ventilation | Canada and US code-aligned channel design |
Cor-A-Vent Sturdi-Strips Rainscreen Furring Strips
Best for rainscreen ventilation behind wood, fiber cement, or hardboard siding. These 3/8-inch thick by 1 1/2-inch wide strips provide drainage efficiency, keeping insects out while enabling moisture to drain away and air to pass behind the siding. Each box contains 112 pieces at 4 feet each, totaling 448 linear feet. Choose this if you need a durable, consistent furring system that prioritizes moisture management and insect exclusion.
- Best for rainscreen applications behind common exterior sidings.
- Better for projects prioritizing drainage and airflow with insect barriers.
- Limit: Not specified for extreme curved surfaces; ideal for straight runs.
Quarrix ProTect Furring Strips 1 1/2″ x 5/16″ x 8′
This option offers a compact profile suitable for tighter wall assemblies where space behind siding is constrained. The ProTect line emphasizes breathability and structural resilience, reducing the risk of warping or mold with consistent airflow behind cladding. Best for smaller projects or retrofit jobs where full-depth strips are undesirable.
- Best for space-limited installations.
- Better for installations demanding warp- and mold-resistance.
- Limitation: Smaller cross-section may offer less bulk structural support than wider strips.
Quarrix ProTect Furring Strips 3″ x 1/2″ x 8′
Designed for larger gaps and higher ventilation needs, these 3-inch wide strips provide robust airflow behind siding. They are built to last, with resistance to warping, splitting, and mold. Best for medium- to large-scale siding projects where airflow pathways must stay clear over longer runs.
- Best for moderate-to-large ventilation requirements.
- Better for projects needing a stable, durable strip with larger cross-section.
- Limitation: Heavier and may require more fitment effort during installation.
Quarrix ProTect Furring Strips 3″ x 3/4″ x 8′
This wide, high-ventilation option is suited for areas with elevated moisture and where substantial airflow behind siding is desired. The broader 3/4-inch thickness improves air channels and drainage capacity. Best for new builds or major renovations in moisture-prone climates.
- Best for high-moisture environments requiring ample airflow.
- Better for installations needing strong airflow paths across larger cavities.
- Limitation: Might be overkill for small or thin-wall projects.
Watairvent Furring Strip 8 ft. Black
Watairvent furring strips introduce dual vertical and horizontal channels on both faces, enabling dual drainage and cross ventilation. The design reduces surface contact by 86% versus traditional wooden furring strips, supporting better moisture management. It also aligns with Canadian and U.S. building code expectations for capillary breaks in high-moisture contexts. Best for projects needing enhanced drainage and airflow with minimal contact surface.
- Best for dual-channel drainage and cross-ventilation needs.
- Better for high-moisture climates and code-conscious installations.
- Limitation: May be more complex to install due to channel alignment requirements.
Buying Guide
What is the main purpose of 3/8 furring strips?
3/8 furring strips create a ventilation gap behind siding, helping moisture escape and enabling air to circulate. This reduces moisture buildup, rot risk, and mold growth while supporting siding longevity.
How to choose the right size and profile?
Consider the siding type and climate. Narrow profiles suit tight wall spaces, while wider strips maximize airflow in high-moisture environments. Thicker options can add structural rigidity but may require longer installation time.
What materials work best in different climates?
Plastic or polymer strips resist mold and warp better in humid climates, while longer-lasting composites can suit cold, exposed exterior walls. In regions with heavy rainfall, dual-channel designs improve drainage and airflow behind siding.
Are there installation considerations I should know?
- Ensure consistent spacing and alignment to maintain a uniform ventilation gap.
- Match your furring strip thickness and width to the siding profile and fastener type.
- Prepare for moisture-prone areas by selecting breathable, mold-resistant materials.
How do I balance cost and performance?
Choose based on project scale and moisture risk. Smaller profiles are cost-efficient for simple renovations, while wider or dual-channel designs offer superior drainage and ventilation for long-term durability.
What about code compliance?
Look for products that meet or exceed applicable building codes for ventilation and moisture management. Some options explicitly reference standard compliance for high-moisture indices in both Canada and the U.S.
FAQ
- What is the best 3/8 furring strip for rainscreen siding? The Cor-A-Vent Sturdi-Strips are designed for rainscreen installation behind wood, fiber cement, and hardboard siding with built-in drainage and airflow.
- Which option is best for tight wall spaces? The Quarrix ProTect 1 1/2″ x 5/16″ strips fit smaller profiles and are less bulky than wider options.
- Are dual-channel furring strips worth it? Yes, for projects needing dual drainage and cross ventilation, as they reduce surface contact and improve moisture management.
- Which product is best for high-moisture climates? The Quarrix 3″ x 3/4″ and the Watairvent strips are well-suited for high-moisture environments due to their broader channels and dual ventilation design.
- Can I mix different furring strip sizes on a single project? It is possible if sections require different airflow or spacing, but consistency in the chosen system improves performance and ease of installation.
- Do these strips meet building codes? Several options reference compliance with national or local building codes related to drainage and moisture, but verify local requirements for your project.