False ceilings (or drop ceilings) provide an aesthetic and insulation as well as lighting control of modern interiors. However, with time, others start cracking or hanging down - a nightmare that alludes to underlying problems. Knowing the reason why this occurs can be used to avoid expensive repairs in the future.
The primary cause of sagging ceilings is moisture infiltration. The water which passes through the roofs, condenses in the AC, or the moist weather will be absorbed in gypsum boards and other materials that will absorb the water. When they become wet, they swell, amorphize and become structurally soft. The panels are drawn downwards by gravity over time creating bulges or dips that can be seen.
Prevent water above the head of the ceiling, seal up ducts in the HVAC system and be well-ventilated. When it is wet, look at moisture-resistant PVC or gypsum boards, rather than ordinary ones.
Another guilty party is a weak frame. False ceilings are made using metal channels and suspension rods in order to support the weight. Cracks and sagging will be observed in a few months in case joints are poorly aligned, hangers are not fixed properly, or grid spacing is too large.
It is recommended to always use recommended frame spacing (2-2.5 feet) and good quality galvanised parts. All the joints are tightened and the hardware is anti-rust to ensure durability.
Constructions easily swell and shrink with changes of temperature. In the absence of expansion gaps or flexible joints in ceilings, the stress accumulates in the edges and results in hairline cracks or separation of the joints.
Do not seal up small perimeter gaps and install flexible jointing compounds. These take up small movements without destroying the surface.
False ceilings are not made to support too much weight. The framework can be pulled down by hanging chandeliers, fans on the ceiling or air-conditioners.
Bearing heavy fixtures on the main slab is not to be carried out but mounted on independent supports. Only lightweight lighting fixtures should be fitted in the false ceiling.
With time, natural wear and dust build-ups, as well as lack of proper maintenance, erode materials. Frequent monitoring helps in averting small cracks into large damage.
The cracks or even the sinking ceilings are not merely cosmetic, it is an indication of the problem that includes moisture, building, or construction. A combination of the right materials, professional installation and regular checkups are sure to have your ceiling sleek and classy over the years. False ceilings are functional and aesthetic features and thus they require care periodically to remain faultless.