The Houseboats / kettuvallams of Kerala are giant country crafts, measuring up to 80 feet in length. The Kerala houseboats that cruise the backwater of Kerala ... Kettuvalloms or Houseboats (Riceboats) are country boats that were used in the early days for the transport of goods from the isolated interior villages to the towns. With the advent of roads, bridges and ferry services, gradually the kettuvalloms went off the scene. Now these kettuvalloms are back again as a major tourist attraction. A house boat is about 67 to 100 feet in length and has a width of around 18 feet to in the middle. The materials that go into the making are all local and Eco friendly bamboo poles, coconut fiber ropes, bamboo mats, coir carpets etc. The main wood used is "Anjili".