Most Tudor houses were made out of timber (wood), like oak and occasionally elm.
In Victorian times they covered all wood with tar, but the Tudors left them bare.
Tudors also used wattle which they would weave into screens, the screens would then have daub (a mixture of clay, sand and dung ) smeared all over it. Once this had dried they might paint it. These would act as walls.
Rich Tudor Houses -
The rich mostly lived in country mansions, that were built out of Tudor stone and glass windows.
Only very rich people could afford glass because it was so rare, but Hardwick Hall in Derbyshire was laughed at the time for being 'more glass than walls'.
Most Tudor houses are still standing today and some are now open for the public to see.