1) Salzman considered that these were not wooden tiles or shingles, but boards which were laid across the roof in readiness for thatching, or perhaps tiling, but the evidence is not conclusive.
1327 cum c thakebordes ad fabricam, York
1354-5 in ccc de thakbord emp. pro stauro ecclesić, Ripon
1377 de nouo cooperient de unica plita de Thakborde, York
1479 solutum pro cc de le thakburds pro tegulacione eiusdem domus, York.