The wooden frame has an important advantage: it can be restored at any time of his life. Restoration work is comparable to a renovation. The goal of the restoration is to renew the coating that over the years has inevitably lost the original appearance, but it has not yet been damaged beyond repair (no cracks or broken). So it is necessary to prevent the coating completely lose the properties of wood protection, as the barrier from UV radiation or sealing water, as this would cause a rapid deterioration of the manufacture with blistering paint and disrepair of the wood.