Greater Manchester Fire and Rescue Service are using a tactic to let the fire burn out in a controlled way.
Andrew Heywood told ITV Granada Reports: "It's large quantities of flammable material, paper, plastic that's been shredded and compacted...So there is a massive fireload in that building and it will continue to burn for days".
More top news
Wintry mix of showers continues today, slowly easing. Less cold this weekend but showers or rain never too far away.
The first man convicted of murder on the basis of DNA evidence should be moved to an open prison, the Parole Board has recommended.
A man who was due to be sentenced for beating his pet dog released from prison by mistake. WARNING: Contains video you may find upsetting