Popular in the 1980s, decramastic roofs (also known as pressed metal tile roofs) are made from lightweight sheeting, formed to the shape of 5 tiles and coated with bitumen. This new roofing material was often installed straight on top of the original corrugated galvanised iron roof.
Decramastic roof tiles are bitumen or mastic-based pressed metal tiles that were produced before the early 1980s. They were metal, scallop-shaped, and had a stone chip coating to offer durability and protection from the elements. Most, if not all, of these roof tiles, contained asbestos. But this is where there is a little bit of confusion. The profile of these tiles is decramastic, and similar tiles are produced today. Of course, without asbestos.
Painting of decramastic roofs is a highly specialised part of the painting industry that use specialised painting products. Master Painters NZ Association recommends that painting of decramastic roofs is only carried out by industry specialists.
The restoration process can involve several steps, including cleaning, dent repairs, taping and protecting, and recoating. Splits and holes in tiles can often be repaired and filled with epoxy resins. At this stage, rust inhibitors and primers are also often applied.
Once repairs are completed, expert roofing companies can apply three coats of primer and paint, including granule chips where they have come off over time.
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