An unknown number of fire-setting pests are at large after wasting emergency services' time in Greater Hobart on Tuesday night.
Brigades were called to three fires at Herdsmans Cove and Gagebrook, but there was no major damage.
Hobart Brigade responded to a burning home on Goulburn Street around 8:20 on Wednesday morning and found it well alight on arrival.
Police closed the road between Molle and Barrack Streets as firefighters knocked down the flames which spread to the roof.
Authorities say it's too early to say what caused it.
Meantime an egg-laying shed containing thousands of chickens went up in flames at Karoola north of Launceston early on Wednesday morning.
"Crews from Lilydale and Rocherlea were alerted to the fire at around 4.30am and arrived to find the 10 x 50 metre shed in Brown Mountain Road engulfed in flames," said Station Officer Darren Gye.
"Quick work by the fire fighters prevented a nearby shed of equal size containing more chickens from catching fire."
Investigators arrived on the scene, with no word on a cause yet.
There's also a reminder for those with woodheaters to clean their chimneys heading into winter, after crews responded to callouts at Elizabeth Town and Acton yesterday evening.
Images: the Goulburn Street fire (Rory O'Grady)