Polystyrene Products and Custom CNC Hot Wire Profile Cutting Services

 

 

 

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            FREQUENTLY ASKED QUESTIONS

 

Polystyrene comes in many different grades. What type do you use for for your cornices?     All our cornices are manufactured from blocks of virgin 20DV flame retardant polystyrene.

 

Is handling prior to installation a problem with something as easily damaged as polystyrene?     The finished cornices remain in the blocks of polystyrene from which they are cut until ready for use.  These blocks provide protective packaging and facilitate transport and storage because they may be stacked flat or upright.  A typical block holding 100 metres of cornice weighs less than 10kgs and is easily handled by one person.

 

Not everyone has experience of with working with polystyrene.  How can I be sure the result will be satisfactory if I install the cornice myself?     The cornices are easy to work with, making installation quick and straightforward.  The polystyrene is cut with either a hot wire or a fine-toothed saw an old hacksaw blade being ideal.  Cornices are fixed in position with a paintable, elastic, acrylic sealant which allows a certain amount of  flexing and movement without cracking.

 

What paint can be used on the cornices?      An approved, good quality primer coat or undercoat is applied to the installed cornice before finishing with any water-based paint.  Paints containing chemical solvents should normally be avoided as these could damage the polystyrene.  (Certain solvent-based paints may be used but check with us first!)

 

How long will the cornices last:      Because they are made from plastic, the cornices will last indefinitely under normal conditions.

 

Do the cornices mark or dent easily?      If handled with reasonable care during installation they are unlikely to be marked or dented.  Once installed they are safely out of harms way.  However, any damage which does occur may be filled easily with the same sealant used for installation.  Once painted, the surface is quite hard.

 

Is the product environmentally friendly?      In production, the product is both solvent and CFC free.  Since our polystyrene cornices do not burn or give off toxic fumes, they can be used safely in any room.  As with many plastics, discarded polystyrene should not be disposed of in landfill dump sites, but it is fully recyclable. 
Is polystyrene affected by heat?     Being flame retardant, our polystyrene does not burn. However, extreme heat may cause it to shrink or deform or even melt.    The cornices may be installed near low voltage concealed lighting or fluorescent lighting provided an air-gap of at least 50mm is maintained.
Will the cornices be damaged if the roof leaks?      No polystyrene is not generally affected by contact with water.
What do I do about my old/existing cornices?     In most cases these can be left in place.   Polystyrene cornices with a width of 140mm or more can usually be installed over standard gypsum cornices.

Did you know ...

Over 90% of all new cornices being installed in Europe are manufactured from polystyrene.

 

 

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Last modified: 09/07/08