The Lomanco Deck-Air DA-4 is a shingle-over roof intake vent designed for both new construction and existing roofs. It provides continuous airflow and weather protection, functioning as part of a balanced attic ventilation system. The vent is particularly useful in situations where traditional intake vents are difficult or impossible to install, such as roofs with limited or no overhang. This article details the installation procedures, features, and warranty information for the Lomanco Deck-Air DA-4, based on official documentation.
Features and Specifications
The DA-4 vent is constructed from the same durable materials as the Lomanco Omni Series vents. Key features include:
- 2-1/2″ ring shank nails are included with each vent.
- It is suitable for roof pitches ranging from 3/12 to 16/12.
- The design incorporates enhanced weather protection.
- Integrated end plugs are present every 2 inches.
- The vent provides 9 square inches of Net Free Area (NFA) per linear foot.
- Molded nail lines assist with installation.
- It features a patented design.
- A tapered, low-profile design enhances weather protection and aesthetic integration with the roof.
- The DA-4 can function as either an intake or exhaust vent, offering versatility in ventilation system design.
Installation Procedures
Proper installation is crucial for the effective performance of the DA-4 vent. The documentation outlines specific procedures for different roof configurations.
General Installation Steps
- Position the bottom edge of the ventilation slot 7 inches from the drip edge. A chalk line should be snapped at the desired distance, followed by a second chalk line 1 inch above the first.
- Align the lower front edge of the vent with the edge of the drip edge.
- Install the DA-4 over a 1-inch wide ventilation slot.
- Install underlayment on top of the DA-4, ensuring roof drainage flows over the top of the vent.
- Align starter and first course shingles with the shingle stops on the DA-4 to prevent coverage of the vent openings.
Termination Methods
The documentation details two primary termination methods, depending on the roof structure:
Straight Termination
This method is recommended for gable end walls. The ventilation slots should be terminated 6 inches from the inside of end walls. The DA-4 should extend a minimum of 6 inches past the end of the slot.
Tapered Termination
This method is used for end walls, hips, valleys, and structures. Ventilation slots must be terminated 18 inches from:
- Inside of end walls on gable roofs.
- All hips and valleys.
- Any structure or chimney.
The DA-4 should extend a minimum of 12 inches from the end of the slot when using the tapered termination method.
Ventilation System Considerations
The Lomanco Deck-Air DA-4 is designed to be part of a balanced ventilation system. When properly installed with appropriate exhaust vents, it effectively removes trapped heat and moisture from the attic space. The vent can also be used to boost an insufficient intake system to achieve balance. The documentation emphasizes the importance of achieving a balanced system for optimal performance.
Warranty Information
Lomanco, Inc. provides a limited lifetime warranty for the Deck-Air DA-4, subject to specific conditions. The warranty covers manufacturing defects for the lifetime of the original owner, or for a period equal to the warranty period of the new shingles installed with the vent, whichever is shorter.
Warranty Transfer
The warranty is transferable from the original purchaser to a new homeowner. However, the warranty period for subsequent owners is limited to 50 years from the original installation date or the shingle warranty period, whichever is shorter.
Warranty Exclusions
The warranty does not cover damage resulting from:
- Improper application or installation.
- Fire.
- Flood.
- Earthquake.
- Storm.
- Tornado.
- Other acts of God.
Warranty Coverage
In the event of a defect covered by the warranty, Lomanco’s liability is limited to the cost of the defective part(s), not exceeding the original purchase price of those parts.
Conclusion
The Lomanco Deck-Air DA-4 intake vent offers a versatile solution for attic ventilation, particularly in challenging roof configurations. Proper installation, following the guidelines provided in the official documentation, is essential for maximizing its effectiveness. The lifetime limited warranty provides assurance of quality, though specific exclusions apply. The DA-4 is designed to work as part of a balanced ventilation system, contributing to a more comfortable and energy-efficient home.