FAQs

Do you have standard mouldings?

No. There are commonly used shapes but you are free to create your own design if you would like. You can send a copy of the designs to Barnes or visit our office where our customer service personnel can assist you.

Can you do columns?

We certainly do if you can provide us with the outer dimensions that you would like the column to be and the dimensions of the structural pole in the middle of the column. We will provide the column in two halves to place around the structural center.

Could you design something I have seen before?

If you have a picture or a sketch with the dimensions that we could look at, we could provide a small-scale sample for you to check.

Does DecoTrim® absorb water?

DecoTrim® is a closed cell and cannot absorb water. During the process of moulding a block, tiny channels are formed between the EPS particles. If the material is immersed in water these tiny channels can be filled with water. After immersion for more than 360 days, there may be up to 6% water content by volume, which has entered the channels. Even under such an adverse and rare condition of prolonged saturation, EPS suffers little adverse effect. It maintains its shape, size, structure, cohesion and physical appearance. The ability of EPS to resist the adverse effects of moisture is exemplified by its widespread use in floats, marinas and other applications, which involve full or partial submergence in water for prolonged periods of time.

Does age affect the thermal performance of DecoTrim®?

No. DecoTrim® consists of 98% air and 2% polystyrene, and nothing else. Because of its cellular structure EPS is dimensionally stable, and will not settle over time. EPS used and installed correctly does not deteriorate with age and as such is able to deliver constant R-Values for the life of the building.

Is DecoTrim® strong?

Yes. DecoTrim® is manufactured in a number of classes (or densities), and each class exhibits excellent compressive and flexural strength and dimensional stability characteristics ...at a very high strength to weight ratio. The range of classes available enables specifiers to select the most appropriate balance between structural and insulation properties for any building application.

Is DecoTrim® resistant to chemicals?

It depends. It is resistant to virtually all aqueous media including dilute acids and alkalis and to methanol, ethanol and silicone oils. It has limited resistance to paraffin oil, vegetable oils, diesel fuel and Vaseline, which may attack the surface of DecoTrim® after long-term contact. It is not resistant to hydrocarbons, ketones, esters, paints containing thinners, and solutions of synthetic adhesives.

Is DecoTrim® degraded by ultraviolet light?

Prolonged exposure to sunlight will cause a slight discolouration (yellowing) of DecoTrim® insulation and cause some surface embrittlement. Even so, the thermal insulation properties will not be affected unless exposure results in loss of thickness of the EPS boards, although the friable surface can make bonding difficult. For this reason, EPS insulation should be covered to protect it from UV light if it is to be stored in the open for extended periods.

Is DecoTrim® durable?

Yes. Because DecoTrim® is an inert, organic material, it will not rot and is highly resistant to mildew. It also provides no nutritional value to ants or rodents. To prevent damage to DecoTrim® by pests and insects seeking to gain access to the other materials in buildings which provide a food source, DecoTrim® may be coated with a thin cement slurry. Provided DecoTrim® does not suffer mechanical damage or failure of any fittings that may be used, it should have a life equal to that of the building in which it is installed.

Is DecoTrim® subject to New Zealand Standards?

Yes. Manufacturers when stating the class of EPS and therefore its physical characteristics are required to manufacture to AS1366 Part 3 (1992). As such, the properties of DecoTrim® required for a particular application are guaranteed.