Interior vs Exterior Paint: Which Type Do You Need?
Choosing the right paint for your project isn’t just about colour — interior and exterior paints are formulated very differently. Using the wrong type can lead to peeling, fading, and a wasted investment. Here’s what Randburg homeowners need to know.
What Makes Exterior Paint Different
Exterior paint is engineered to withstand Gauteng’s harsh conditions: intense UV radiation, temperature swings from hot summer days to cold winter nights, and heavy summer rainstorms. It contains UV inhibitors, mildew-resistant additives, and flexible resins that expand and contract with temperature changes. Brands like Plascon Double Velvet and Dulux Weathershield are popular choices for Randburg homes.
Interior Paint Properties
Interior paint prioritises a smooth, washable finish with low odour and quick drying times. It doesn’t need UV protection but does need to resist scuffing, stains, and regular cleaning. Sheen levels range from flat (best for hiding wall imperfections) to semi-gloss (best for kitchens and bathrooms where moisture resistance matters).
Can You Use Exterior Paint Indoors?
Technically yes, but it’s not recommended. Exterior paint contains stronger chemicals and volatile compounds that can produce lingering odours indoors. It also tends to have a different sheen and texture that doesn’t look as refined on interior walls. Always use paint designed for its intended environment.
Choosing Paint for Gauteng’s Climate
Randburg sits at about 1,700m above sea level, which means stronger UV exposure than coastal areas. North-facing walls get the most sun and need high-quality UV-resistant exterior paint. South-facing walls stay damp longer and benefit from anti-fungal formulations. For interiors, Gauteng’s dry winters mean paint dries quickly — but also means you need to work fast to avoid lap marks. Premium brands like Fired Earth offer excellent coverage for both conditions.
Not sure which paint is right for your project? Our experienced painters can advise. Call LP Tiling & Painting for a free, no-obligation assessment.