In houses built in the 70s and 80s, it's common to see balconies with cracked concrete and exposed rusted iron. To a lay buyer, this is a sign of "imminent ruin." To a technician ("handyman"), this is simply carbonation, a common and repairable chemical pathology.

The Science of the Problem: Concrete is naturally alkaline (high pH), which protects the iron from rust. Over time, CO2 from the atmosphere penetrates the pores of the concrete, lowering the pH. When this acidity reaches the iron, it begins to oxidize, expands in volume, and "bursts" the concrete covering it (spalling phenomenon). A frightened buyer will estimate a "structural reconstruction" of R$ 20,000 and deduct that from the price.

The Technical and Economic Solution: At Royal House, we know that the repair is simple if done in time:

Mechanical brushing of the reinforcement to remove rust.

Application of a rust converter or passivating primer.

Volumetric repair with thixotropic (fiber-reinforced) structural repair mortar.

Painting with anti-carbonation paint (which prevents CO2 from entering). By presenting the property with these repairs completed and documented, we transform a serious structural objection into a resolved maintenance detail, protecting the value of your asset.