Aluminum roof pergolas make it well worth your while to take a good long look at them. For one thing, the roof gives excellent shading and protection from rain to keep outdoor spaces fresh under hot summer conditions or when clouds come rolling in with sudden showers of rain. Fresh aluminum does not corrode into a salty mess of powdered rust; rather it has a long life and requires just infrequent maintenance to keep going indefinitely. More Than Just Looks When covered With Plants. Also, the pergola's unique way of facing sunshine with its filter feature cuts down on exposure to harmful rays from the sun. It thus becomes a much safer environment in which to spend time outside than is possible in traditional outdoor situations. In addition, the aluminum roof is easy to install, energy-efficient and adds value to all kinds of properties. So these practical advantages plus the appearance of beauty and elegance make an aluminium canopy roof a good and worthwhile investment for any home-owner or business.