Moisture in the ground
that can rise into porous building materials unassisted by man made
sources, (like water leaks) - a rare occurrence in properly constructed
buildings however old. Very difficult to prove its presence in a building.
Man Made Rising
Moisture added to the ground
by water leaks and poor maintenance - the usual cause of dampness
Moisture that is sucked
up via an absorbent building material - skirting board wood, plaster,
Moisture coming from outside
the building above ground - so not rising
Moisture coming from the
air in the building, so not rising or penetrating. Often associated
with Mold growth.
Pressure of below ground
moisture, becomes higher as you go deeper
Damp Proof Course
A water proof material
layer (Bitumen, slate or plastic) inside a wall designed to stop natural
rising damp from reaching the wooden floor joists, wooden skirting
boards and the wall plaster
A water repellant layer
inside a wall designed to 'control' natural rising damp from reaching
the wooden floor joists, wooden skirting boards and the wall plaster
- not as good as a Bitumen, Slate or Plastic layer.
A waterproof liquid coating
applied to walls and floors to form a complete 'tank' - in practice
virtually impossible to achieve - largely replaced by Air Gap Membranes.
Air Gap Membranes
Dimpled plastic sheets
designed to line (not Tank) a wall or floor, fixed using plastic plugs
fitted with neck seals, designed to provide a barrier between wet,
damp or salt contaminated walls and new insulation, plaster, plasterboard