Allied Carpets awarded the business to Carat without a formal pitch process.
Allied Carpets is owned by the French retail giant Tapis-Saint Maclou and has a network of 224 stores.
As well as carpets and floor coverings, Allied Carpets sells other household goods including beds.
Dino Ioannou, communications planning director at Carat, said: "Allied has ambitious plans for its business and has appointed Carat to develop creative and innovative media strategies to drive its brand."
Allied Carpets ended its 10-year relationship with Brand Connection last year to shift its UK media account into AMS Media, because the agency was planning to use "new" media outlets whereas Brand Connections favoured traditional national press.
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This article was first published on brandrepublic.com