Select the Plasters second;
Plasters are used to joint the wall sections together.
NOTE You will need a plaster between each wall section in a straight line and a corner plaster at building corners.
Plasters come in;
Single storey - coming soon
Double storey
Single upper storey - coming soon
Plasters come with full width or half width friezes to match wall sizes.
Note you use the frieze to cap each wall section where it meets the roof.
For corner Plasters see here