Fire Rated Ductwork

Southern Ventilation Limited are often given the task of fabricating fire proof ductwork, within contracts. 

Fire Rated ductwork is manufactured in a similar manner to ordinary ventilation ductwork, from pre galvanised sheet steel, the difference being, that the ductwork is treated prior to delivery to site with a proprietary coating having intumescent and fire protective properties.

The ductwork is put together with an in tumescent tape seal, to provide a fire resistant and pressure resistant seal, which will enable the duct to be tested up to Class C pressure classification if required. The seal is manufactured for us and has been used successfully to seal the flanges in a 4-hour fire test.

When the ducts are specified to have a fire insulation a compressed rock fibre insulation is fixed on the outside of the finished ductwork installation with a calcium silicate bearer placed between the ductwork

Upon completion Southern Ventilation can issue a certificate for all items supplied and installed stating that the system conforms to the requirements of B.S. 476 part 24:1987.