An explosion of an aerosol can alerted a Swaffham Prior couple to get out of their house and call the fire service on Tuesday evening.
The extension of the house, in Cage Hill, caught fire at around 9.28pm.
Four fire engines from Burwell, Newmarket and Cambridge, supported by an incident command vehicle and supporting crew from Huntingdon, attended the incident.
Station Commander Scott Feveyear said: “The crews did a fantastic job in preventing the fire spreading to the rest of the house as the fire had started to get into the roof.
“An explosion of an aerosol can alerted the couple to the fire and they were able to get out and call the fire service.”
Crews wearing breathing apparatus extinguished the fire using two hose reels and two jets.
The cause of the fire was accidental, most likely caused by an electrical fault.
The last crew returned to the station at 1.40am.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here