Standing in front of a nearly completed building, the last thing you want to see is a wall that looks like a series of undulating waves or is covered with a dense network of nail holes. We have seen far too many cases where improper installation methods have drastically reduced the aesthetic appeal of the boards. Today, we will discuss how to achieve wall flatness using "concealed anchoring."
Why do traditional methods often fail?
Typically, we attached boards to the joists by using screws. The problem with this fast method of attachment is that the screws will pull the boards inward as you tighten them. Each screw may have a small indentation around its head when you first install it but when you have a hundred or so boards all lined up next to each other, the little indentations around the screw heads will add together and the wall will appear uneven and pitted under side lighting.
Furthermore, fiber cement boards have their own "temperament"-they expand and contract with temperature changes. If screws are driven in too tightly, leaving no room for movement, stress will build up inside the board. Over time, this can cause the board to crack or the joints to warp, rendering even the best initial flatness useless.
The "Magic" of Concealed Anchoring: Giving the Board a "Floating" Space
The core idea of concealed anchoring can be summarized in one sentence: transforming a "rigid connection" into a "flexible suspension."
How is this achieved? Current technology is quite mature. We use a specialized dry-hanging system. During installation, instead of screwing directly into the board surface, grooves are created or hanging brackets are pre-embedded on the back of the board. These brackets are then hooked onto the keel system.
In this manner, the board is essentially unsupported by anything except an unseen bracing system to maintain its horizontal position and remains in a relaxed, non-strained state with the weight of the entire board being evenly dispersed throughout the (hanging) support brackets attached to it. Therefore, the ultimate amount of flatness found in the board will directly transfer to the amount of flatness found in the wall upon completion of the installation, with no deformations occurring during the installation process.
Double Guarantee for Flatness
Achieving optimal flatness requires more than just suspension-it also requires adjustment.
A high-quality concealed system includes adjustable framing and mounting hardware. During installation, workers can fine-tune the position and elevation of each panel by rotating bolts on the mounting hardware, achieving millimeter-level precision.
This is equivalent to installing a "leveling system" within the wall. Even minor irregularities in the base structure can be compensated for by this "invisible framework," ensuring a smooth, almost mirror-like final surface.
Beyond Aesthetics: Additional Practical Benefits
From the client's perspective, this method offers more than just visual appeal.
Durability without damage: Because there are no exposed screws, there is no risk of rainwater seeping into nail holes and causing rust or water stains. The overall integrity of the wall is improved, and its resistance to wind pressure is enhanced.
Easy and worry-free maintenance: If a board is accidentally damaged, traditional removal methods would likely damage surrounding panels. In contrast, most concealed systems support reverse disassembly, allowing only the damaged panel to be replaced, significantly reducing repair costs.
