Understanding NORX Cladding for Vertical Applications
NORX composite cladding is a wood-plastic composite material, with the Barcelona Collection offering a PVC option. All NORX boards are suitable for both interior and exterior applications, including walls, ceilings, and soffits. The key to its adaptability for vertical layouts lies in its hidden clip fastening system, which secures the boards to a substructure regardless of orientation. This system ensures a clean, fastener-free surface, which is particularly effective in vertical designs where visual continuity is often desired.
When considering NORX for vertical use, it's important to note the collections offer different profiles and capping. For instance, the Paris, Rome, London, Los Angeles, and New York Collections feature boards capped on four sides, while the Rio Collection is capped on three sides. The Barcelona Collection, made of PVC, is also capped on four sides. These details can influence how board ends are finished, especially in areas where cuts are exposed.
Substructure Requirements for Vertical Cladding
For vertical NORX cladding, the substructure plays a critical role in supporting the boards and facilitating proper drainage and ventilation. Unlike horizontal cladding, which typically fastens to vertical furring strips, vertical cladding requires horizontal furring strips. These strips provide the necessary attachment points for the hidden clips and create an air gap behind the cladding. This air gap is essential for managing moisture and promoting airflow, contributing to the longevity of the wall assembly.
The horizontal furring strips should be securely attached to the structural wall. The spacing of these furring strips must align with the manufacturer's recommendations for the NORX hidden clip system. Proper alignment ensures that each cladding board is adequately supported along its length and that clips can be installed correctly. It is also important to consider the material of the furring strips, ensuring it is suitable for exterior exposure and compatible with the cladding system.
Planning Drainage and Ventilation in a Vertical Layout
Effective drainage and ventilation are paramount for any exterior cladding system, and vertical NORX cladding is no exception. While the vertical orientation inherently promotes water runoff, preventing moisture accumulation behind the boards requires careful planning of the substructure and detailing. The horizontal furring strips create channels that can potentially trap water if not properly managed. Therefore, weep holes or drainage gaps should be incorporated at the bottom of the wall assembly to allow any accumulated moisture to escape.
Ventilation is equally important to prevent condensation and manage temperature fluctuations within the wall cavity. Continuous airflow behind the cladding helps to dry out any moisture that might penetrate the system. This often involves creating inlet openings at the base of the wall and outlet openings at the top, typically at the soffit or coping line. These openings should be protected with insect screens to prevent pests from entering the cavity.
Detailing Start and Finish Points
The starting and finishing details for vertical NORX cladding are crucial for both aesthetics and performance. At the base of the wall, sufficient clearance must be maintained between the bottom edge of the cladding and the finished grade or adjacent surfaces. This clearance helps prevent moisture wicking into the cladding and allows for proper drainage. A starter track or trim piece is often used to establish a clean, level base and provide the initial attachment point for the first row of vertical boards.
At the top of the wall, where the cladding meets a soffit, coping, or roofline, careful detailing is needed to shed water away from the wall and protect the top edges of the boards. A drip edge or flashing should be integrated to direct water away. Consideration should also be given to how the cladding boards terminate visually, whether they are cut flush, mitered, or covered with a trim piece. For ends that are field-cut and expose the core, especially for three-sided capped boards, a suitable sealant or end-cap treatment might be appropriate to maintain the board's integrity and appearance.
Worked Example: Vertical NORX Cladding on an Entry Wall
Consider a hypothetical entry wall measuring 10 feet wide by 9 feet high where you wish to install NORX London Collection cladding in the Oxford color, vertically. The London Collection features wide slat panels, capped on four sides, which offers good resistance to moisture. The goal is a uniform, modern appearance.
First, establish the substructure. You would install horizontal furring strips, likely 1x3 or 1x4 treated lumber, spaced according to NORX installation guidelines (e.g., 16 inches on center) across the 10-foot width. This means approximately 8 furring strips would be needed, running horizontally. Each strip would be 10 feet long. Next, calculate the number of NORX boards. If the London Collection boards are, for example, 6 inches wide (actual coverage), you would need 10 feet (120 inches) / 6 inches = 20 boards to cover the width. Each board needs to be cut to 9 feet in length. NORX boards are typically supplied in standard lengths (e.g., 12 or 16 feet). To minimize waste, 9-foot lengths could be cut from 12-foot boards, leaving 3-foot offcuts. However, a 16-foot board could yield one 9-foot piece and one 7-foot piece, with the 7-foot piece potentially usable for another section or as waste. For this 10x9 wall, if using 12-foot boards, you would need 20 boards, each 12 feet long, yielding 20x9-foot pieces and 20x3-foot offcuts. If using 16-foot boards, you would still need 20 boards, as a single 16-foot board only yields one 9-foot piece for this height.
At the base, a starter trim would be installed to ensure a level start and provide a drip edge. At the top, a simple L-flashing would be installed over the top of the furring strips and the cladding to shed water away from the wall. The hidden clips would be attached to the horizontal furring strips, securing each vertical board. Careful attention to the plumb of each board is essential for a clean vertical line. The four-sided capping of the London Collection helps protect cut ends from moisture, but a clean, precise cut is still recommended for exposed edges.
Before you order
- Confirm local building codes and manufacturer's installation guidelines for vertical cladding.
- Verify the specific NORX collection and profile chosen is suitable for vertical application and desired aesthetic.
- Plan the substructure, ensuring horizontal furring strips are correctly spaced and securely fastened.
- Detail drainage and ventilation pathways at the top and bottom of the wall assembly.
- Determine how cladding will terminate at corners, windows, doors, and other transitions.
- Calculate material quantities, accounting for cuts, waste, and specific board lengths.
- Obtain physical samples of the chosen NORX cladding color and profile for final review.
- Consider the appearance of cut ends, especially for boards not capped on all four sides.
Confirm installation details, approved uses and warranty terms in the current instructions for the exact product and profile. Your installer should verify the substrate, structure and applicable project requirements.
Questions to help you decide
Can NORX cladding be installed directly onto studs for a vertical layout?
No, NORX cladding, whether installed horizontally or vertically, requires a substructure of furring strips. For vertical cladding, horizontal furring strips are necessary to provide adequate attachment points for the hidden clip system and to create a vital air gap behind the boards for drainage and ventilation. Direct attachment to studs would not allow for proper airflow or moisture management.
How do I handle corners with vertical NORX cladding?
Corners with vertical NORX cladding can be finished in several ways. One common approach is to use mitered cuts for a seamless appearance, though this requires precise cutting. Alternatively, a trim piece, such as an L-trim or a corner profile, can be used to cover the exposed board edges and provide a clean finish. The choice often depends on the desired aesthetic and the specific NORX collection's profile.
What maintenance is required for vertically installed NORX cladding?
NORX cladding is designed for low maintenance, regardless of orientation. The manufacturer recommends rinsing the boards as needed to remove dirt and debris. It does not require painting or staining. For vertical applications, the natural shedding of water helps keep the surface cleaner, but periodic cleaning will help maintain its appearance. Always refer to the specific NORX collection guidelines for any particular care instructions.
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