A north-facing terrace is a tricky spot in the city. It rarely gets direct sun, stays cooler than the rest of your home, and often holds onto moisture after rain or morning dew. That combination—dim light, damp air, and limited airflow—is exactly what mildew needs to grow. If you choose the wrong furniture, you will soon see black spots, musty smells, and fabric that never quite dries.
The good news is that you do not need to give up on having a comfortable outdoor space. You just need to choose materials that are naturally non-porous, quick-drying, or naturally resistant to fungal growth. Here are the best options for a north-facing urban terrace.
Aluminum is one of the safest choices. It does not absorb water, it will not rust, and mildew has nothing to feed on. Powder-coated aluminum is even better because the coating adds a smooth, sealed surface that wipes clean easily. Look for frames with drainage holes so water cannot pool inside the tubing.
Teak is a classic outdoor wood, and for good reason. Its natural oils make it highly resistant to moisture, rot, and mildew. On a north-facing terrace, teak will weather to a soft silver-gray, but it will not break down. If you want to keep the golden color, you can oil it once or twice a year. Avoid cheaper woods like pine or birch unless they are fully sealed, because they soak up water and become mildew magnets.
High-density polyethylene, often called HDPE or poly lumber, is another excellent option. It is non-porous, UV-stable, and does not absorb moisture at all. Many HDPE pieces are made from recycled plastic, which makes them a smart eco-friendly choice. They are heavy enough to stay put in wind and easy to clean with soap and water.
Resin and polypropylene are budget-friendly and very practical. These materials are molded into chairs, tables, and storage boxes. They dry quickly, resist mildew, and can be hosed down. The main downside is that some cheaper resins can become brittle after years of cold, damp weather, so choose thicker, higher-quality pieces if you can.
Glass and powder-coated steel deserve a mention too. Tempered glass tabletops do not support mildew growth, and they let light through, which can brighten a dark terrace. Powder-coated steel is durable and sealed, but you must check for chips or scratches. Once moisture reaches bare steel, rust starts, and rust can trap dirt and encourage mildew.
What about cushions and fabrics? This is where many people go wrong. Standard foam and cotton canvas will stay damp and grow mildew fast. Instead, choose quick-drying foam with open-cell structure, and look for solution-dyed acrylic or olefin fabrics. These are designed to resist mold, mildew, and fading. Better yet, choose cushions with removable, washable covers and store them indoors during long wet spells.
Materials to avoid include untreated softwood, wicker made from natural fibers, and cheap particle board. Natural wicker looks lovely but traps moisture in its crevices. Untreated softwood swells, cracks, and grows black mold. Particle board will swell and fall apart after one damp season.
Finally, good habits matter as much as good materials. Leave space between furniture and walls so air can move. Use slatted or mesh surfaces instead of solid tops. Wipe down surfaces after rain, and consider a small dehumidifier or fan if your terrace is enclosed. With the right materials and a little airflow, your north-facing terrace can stay fresh, clean, and ready to enjoy all year.