Kendal's famous Quaker Tapestry will have to move to a temporary new home because of weather damage to its premises.
Repairs are being carried out to the grade two listed building after Cumbria experienced the second wettest year on record in 2012.
What looked initially like a need for minor repairs turned out to be far more serious, costing £25,000. One wall was found to be wringing wet.
An oak beam needs to be replaced as do all the plaster mouldings around the window and ceiling cornices.