Vernacular Design
A Vernacular structure is one that built in the style of the time. In the case of the 14th and 15th centuries the construction is likely to be of timber frame in England. In modern day a Vernacular building is more likely to be of bricks and mortar.
According to the Wikipedia page:
Munt Cottage, Belchamp Walter is an example of Vernacular dwelling in England from the 14th to the 20th centuries.
The image above shows Munt Cottage in the process of re-thatching. Unlike the image below the thatch was not all removed prior to the installation of the new thatch.