Most Indian houses are made of bricks. They come in three forms: wet bricks, mud bricks and cooked bricks. Wet bricks are only used to make mud bricks, not as a construction material.
To create a wet brick you need the Brick Mould, that you can buy from the Chief`s house or the Fort and one dirt and one sand in your inventory. You then need to right-click on a block to create a wet brick. If this Wet Brick lies in the sun, then it becomes a Mud Brick after some time.