Chimica Organica Industriale Milanese (Coim) – a leading Italian manufacturer of roofing systems – says that it is happy with the response the company has received in the region for its range of roofing solutions – especially the Lariver and Cesarea series.

Towards the north of Jeddah, Coim has recently provided more than 100,000 sq m of plastic sheets, roofing and wall cladding material for a facility within the industrial area.
The facility – a major manufacturing industry for building products operating over a 400,000 sq m area – has chosen Cesarea opaque ribbed translucent sheets for the roofing and cladding work, and Lariver translucent glass reinforced plastics (GRP) ribbed sheets for the skylights.
“These products were selected thanks to their resistance to industrial acids and chemical compounds as well as their ruggedness, apart from them being light, easy to handle and exhibiting consistent mechanical strength,” says a company spokesman.
Lariver represents translucent or opaque GRP, manufactured by Coim, to cover specific roofing and vertical cladding requirements in residential, industrial and sports buildings as well as agricultural establishments.
“Coim’s manufacturing programme of the GRP line is completed with the laminated products supplied in the form of sheets with sinusoidal or trapezoidal profiles,” says the spokesman.
“Thanks to the use of top-quality raw materials and automatic in-process control over all phases of production, a product of very high and consistent quality is obtained, with isotropic mechanical properties. The various types of profile allow use of solar protection sheets or in combination with other roofing materials (fibre cement, metal sheets, ribbed panels, etc),” he adds.
Lariver is also available as curved sheets with either sinusoidal or trapezoidal profiles for use on vaulted roofs. “The radii of curvature are variable as well as the weights and lengths of the sheets,” he explains.
The spokesman adds: “In order to perform efficiently, the GRP sheets should meet specific requirements, the most important ones of which include: Static stability or resistance to loads; wind stability; impact strength; water-tightness; resistance to high and low temperatures, aggressive agents, biological factors; morphological stability; fire resistance; and thermal and acoustic insulation.
“In addition, when compared to metal sheets, the sound attenuation of GRP sheets is about five times better and they do not give off unpleasant or harmful emissions,” he points out. “Also the Lariver series exhibits other qualities such as: surface uniformity; dielectric strength and useability in any type of environment – be it rural, average industrial, metropolitan, coastal or mountainous.
Lariver is also being known for its long-lasting qualities.
“Various parameters should be taken into account in order to ensure a normal physiological ageing process for GRP namely: chemical composition of the polyester resin and its molecular weight; degree of polymerisation of the finished product; presence and quantity of ultraviolet (UV) inhibitors; apart from the type and quantity of monomer used,” he adds.
Set up in 1962, Coim specialises in polycondensation products (esters) and polyaddition products (polyurethanes). Aided by a team of 500 professionals, the company is active throughout the world, with an extensive network of factories, offices and agents.
The company carries out its development work, sales and assistance both directly and in collaboration with a vast network of suppliers and partners, and has factories in Italy, Brazil, Singapore and Germany.
Five production lines enable the company to distribute its products in markets unreachable to its competitors where there is a demand for particular types of product. At Coim, development of the laminate department has been innovative and original resulting in products aimed directly at installers, thus changing handling end receipt of raw materials end the finished product. Once again, teamwork guarantees precise organisation and respect of deadlines.