When applied correctly by a professional, modern renders like silicone, Weber, or PRB are designed to last between 25 and 30 years. Unlike traditional sand and cement, which may require repainting every few years, these through-colored systems maintain their appearance and structural integrity for decades with very little intervention.

Yes, but the preparation is key. Systems like Parex and Weber have specific base coats designed to bond to difficult or mixed substrates. However, the existing surface must be "sound" (not crumbling or hollow). If the old render is falling off, it usually needs to be removed first to ensure the new system has a solid foundation.

While no building material is 100% maintenance-free, silicone render is hydrophobic, meaning it repels water. When it rains, the water beads up and rolls off, taking surface dirt with it. This significantly reduces the growth of algae and prevents "staining" that you often see on cheaper, more porous materials, Check out our External Render Care & Maintenance Guide

Silicone render is a premium product because of its flexibility. Buildings naturally move, expand, and contract. Traditional sand and cement are rigid and prone to cracking under this stress, whereas silicone "stretches," preventing cracks. You are paying more upfront to avoid the costs of future repairs and frequent repainting.

For an average-sized semi-detached home, the process typically takes between 1 and 2 weeks, depending on the weather. Monocouche systems are often the fastest to apply as they require fewer passes, while multi-coat silicone systems may take slightly longer as each layer needs time to cure before the next is applied.