Choosing the Right Roofing Material for Your Home

Your roof takes everything the New Zealand weather throws at it, so the material you choose matters. Here's how the main options stack up and what to think about before you decide.

Long-run colour steel is the most common roof in the country, and for good reason. It's durable, comes in long single sheets that run from the ridge to the gutter with few joins, and it's light enough to suit most homes without extra structural work. It handles our wind and rain well, comes in a big range of colours and profiles, and a quality steel roof lasts around 30 to 40 years. The main things to watch are corrosion near the coast and walking on it carelessly, which can dent the sheets. For most homes, steel is the sensible default.

Concrete and clay tiles are the other traditional choice, and they last a long time, often 50 years or more. They suit certain house styles beautifully and handle heat and sound well. The trade-offs are weight and cost. Tiles are heavy, so the roof structure has to be built to carry the load, which can rule them out for some homes or add cost to a re-roof. Individual tiles can crack or slip and need replacing, but the upside is you can fix one tile rather than a whole section.

Membrane roofing is the answer for flat and very low-pitch roofs, where long-run steel and tiles won't shed water properly. Modern membranes are tough and reliable when installed well, and they suit the flat-roofed look that's popular on modern homes and extensions. The key with membrane is the quality of the installation and the detailing around edges and penetrations, because a flat roof gives water nowhere to run if the waterproofing fails.

Asphalt shingles are less common here but you do see them. They're relatively cheap and easy to lay on the right pitch, and they suit some house styles. They don't last as long as steel or tile in our conditions, and you'll see the granules wearing off as they age, so think of them as a shorter-life option.

When you're choosing, a few things drive the decision. Roof pitch comes first, because some materials only work above a certain slope and others are made for flat roofs. Your site exposure matters next, especially how close you are to the sea, since salt air is hard on steel and you may want a more corrosion-resistant grade. Then there's the look you want, the weight your structure can carry, and your budget both to install and to maintain over the years.

There's no single best material, only the best one for your roof, your house and your conditions. The cheapest option to install isn't always the cheapest to own once you factor in lifespan and upkeep. If you're not sure which way to go, we can get up on your roof, look at the pitch and condition, and give you a straight recommendation based on what your home actually needs.