DPC

1. DPC(Damp Proof
Course)

2. DPC: It is a layer of waterproof material in the wall
of a building near the ground, to prevent rising
damp. It is generally applied at basement levels
which restricts the movement of moisture through
walls and floors

3. Purpose of DPC(Damp Proof Course) and Its
Effects of Dampness
 Building should remain dry or free from
moisture travelling through walls, roof and
floors.
 Dampness gives unhygienic conditions apart
from reduction in strength of structural
components
 Provision of damp proof courses prevent entry
of moisture in the building
 All Structures are founded on soils
 If the soil is pervious, moisture constantly
travels though it
 Even in the impervious soil, lot of moisture
may be present
 This moisture rise up into the wall & floor
though capillary action

4.  Ground water rise also result in moisture
entry into the building through walls
 If the wall tops are not properly protected
from rain penetration, rain will enter the
wall & travel down
 Leaking roofs will also permit water to
enter
 Heavy Showers of rain may beat against
the external faces of walls & if the walls
are not properly treated, moisture will enter
the wall causing dampness in the interior
 If balconies and chajja projections do not
have proper slope, water will accumulate
on these & will enter the walls through
their junctions
 Moisture will completely damage the
interior paints of walls
Purpose of DPC(Damp Proof Course) and Its
Effects of Dampness

5. Effects of Dampness:
 Ugly Patches on walls
 Materials Used for wall
decorations are damaged
 Stones bricks and tiles
disintegrate due to
efflorescence
 Floor Finish may be damaged
 Electrical Fittings are damaged
 Dampness leads to breeding
of mosquitoes, growth of
termites and germs carrying
diseases such as tuberculosis,
it also aggravates asthma

7.  Backfilling is the process of putting soil
back inside a trench or in a foundation
when the excavation has been completed
 The backfill process requires skills and
knowledge on the specifications, contract
requirements and understanding soil
conditions
 Backfilling is used in tasks such as
protecting foundations, landscaping, or
filling in voids in underground structures
 Every soil has unique characteristics
requiring different construction techniques
to ensure optimum performance
 Impact loading of the pipeline, shafts,
structures, and appurtenances must be
avoided during the placement of backfill
Back Filling

9.  The area surrounding the
building is usually known as the
plinth protection.
 A plinth protection usually is
done by pouring an approximate
100mm layer of plain cement
concrete along the edge of the
building.
 The main idea behind this is to
prevent water retention along
the edge of the building, thus
ensuring its longer life.
Plinth Protection