Plysolene Limited

PIB APPLICATION ADVICE [continued]
Any air leak leads to a build-up of moist air within the insulation material that becomes wet as the air cools and condensation occurs. Over a period of time this can lead to a complete failure of the lagging. The best solution is to eliminate all air leaks, but if this is not possible, very small ventilation holes in the underside of the ductwork can prevent the build-up of moist air within the insulation.

Plysolene PIB is a flexible thermoplastic elastomeric sheet and will never give a flat rigid appearance. Consequently, the top of any ductwork which is close to horizontal should be built-up to give rain a good run off, and the PIB and insulation material should be well supported to prevent puddling. For very large ductwork and any installation where there are numerous large flat areas, where a flatter finish is required, use either 1.0mm or 1.2mm sheeting.