what materials are commonly used for a damp proof course

What is a damp proof course?

The materials commonly used to check dampness can be divided into the following three categories: 1. Flexible Materials: Materials like bitumen felts (which may be hessian based or fibre/glass fibre based), plastic sheeting (polythene sheets) etc. 2. Semi-rigid Materials: Materials like mastic, asphalt, or combination of materials or layers. 3.

What are the materials used for damp proofing?

Mar 26, 2018 · Materials Used For Damp Proofing The following materials are commonly used for damp proofing: 1) Hot bitumen 2) Mastic asphalt 3) Bituminous felts 4) Metal sheets 5) Combination sheets and felts 6) Bricks 7) Stones 8) Mortar …

Which type of bricks are used as damp proof course?

May 05, 2020 · Rich Concrete is the most commonly used material in DPC. Usually, rich concrete in the proportion 1:2:4 that is painted with two relative coats of hot bitumen is used for the horizontal damp proof course. It is suitable for the portions of the building or structure that are not subjected to excessive damping.

What is the best material for DPC?

Types of Materials used for Damp Proof Course. The materials commonly used to check dampness can be divided into the following three categories: Flexible Materials: Materials like bitumen felts (which may be hessian based or fiber/glass fiber-based), plastic sheeting (polythene sheets), etc. Semi-rigid Materials: Materials like mastic, asphalt, or a combination …

What is the most commonly used material for DPC?

Rich Concrete is the most commonly used material in DPC. Usually, rich concrete in the proportion 1:2:4 that is painted with two relative coats of hot bitumen is used for the horizontal damp proof course.

Which type of cement is used for damp proof course?

Damp proofing treatment to floors This layer is known as base course and its material is well rammed. A75 to 100 mm thick layer of lean cement concrete (1:3:6 or 1:4:8) mix or lime concrete is thereafter laid over the base course.Jun 6, 2012

Which metal is used as damp-proof material?

Metal sheets of Copper, Aluminium, or Lead are used to prevent dampness, but they are costly. Sheets of these materials are used throughout the thickness of the wall. The sheets of Lead are laid over Lime Mortar and not with Cement. Mortar due to the chemical reaction of Cement over the Lead.Jul 2, 2014

How do I build a damp proof course?

0:272:00Damp Proof Course (DPC) - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe surface on which the damp-proof course is laid shall be thoroughly cleaned. And wetted beforeMoreThe surface on which the damp-proof course is laid shall be thoroughly cleaned. And wetted before starting the work cement concrete of 1 is to 1 and 1/2 is to three proportions.

What is damp proof membrane made of?

About Damp Proof Membrane Made from HDPE (High Density Polyethylene), membrane helps to prevent moisture from entering a property. It is resistant to salts and moisture, keeping an area safe from damp and condensation.

What is mortar material?

Mortar is a material used in masonry construction to fill the gaps between the bricks and blocks. Mortar is a mixture of sand, a binder such as cement or lime, and water and is applied as a paste which then sets hard.

What is a bitumen damp proof course?

A damp-proof course is a horizontal barrier built into the walls. It is typically located 150 mm above ground level.Dec 16, 2021

Which chemical is best for DPC?

Protekta DPC is a low viscosity, highly penetrating silane, silanol -siloxane solution, which has been specifically formulated to permeate into wet / dry wall. Once impregnated into a course of brickwork, DPC reacts with minerals present to form a durable polymer damp course, which permanently stops rising damp.

Where is damp proof course applied?

Damp proofing material may be like bitumen, mastic asphalt, polythene sheets, bituminous felt, metal sheets, cement concrete, etc. damp proofing course may be provided either horizontally or vertically in floors and walls. The followings process and precautions should be followed while providing DPC.

What is the specification for damp proof course?

It should be impervious. It should be strong and durable and should be capable of withstanding both dead as well as live loads without damage. It should be dimensionally stable. It should be free from deliquescent salts like sulfates, chlorides, and nitrates.Dec 10, 2016

What is the difference between damp proofing and waterproofing?

Although they are often used interchangeably, the terms damp proofing and waterproofing carry distinct meanings in foundation construction. Damp proofing refers to keeping soil moisture (dampness) out of a structure, while waterproofing means protecting a structure from both moisture and liquid water.Sep 26, 2021

What are the methods of damp proofing?

Damp proofing course may consist of flexible materials such as bitumen, mastic asphalt, bituminous felts, plastic or polythene sheets, metal sheets, cement concrete. Damp proofing course may be provided either horizontally or vertically in floors, walls etc.Feb 29, 2012

What is damp proof course?

Damp proof course (DPC) is a barrier of impervious material built into a wall or pier to prevent moisture from moving to any part of the building. Contents: [ show]

What is flexible material?

1) Flexible Materials for Damp Proof Course. The materials, which do not crack and deform their shape when subjected to loading, are called Flexible Materials.

What is damp proof course?

It is a barrier or obstruction that is primarily designed to prevent the moisture rising by the capillary action. The capillary action through which the moisture rises is known as the rising damp.

What is damp proofing?

In other words, a damp proof course can be defined as the layer of material that is used to prevent the penetration or passage of moisture inside the structure through the floors, walls or roofs. It is commonly applied at the basement level of the structure and thus prevents the passage of moisture through the floors and the walls. 1.1.

What is mastic asphalt?

The mastic asphalt mainly consists of bitumen that is mixed with the fine sand in the hot state to form an impervious mass. When the mixture is hot, the consistency is such that it allows the mixture to spread evenly to a depth of about 2.5cm to 5cm. Upon cooling, the mixture sets. However, special care must be taken while laying the mastic asphalt as the damp proof course.

What is hot laid bitumen?

The hot laid bitumen is mostly used on a bedding of cement concrete or mortar. It is usually laid in two consecutive layers at the rate of 1.75kg/m² of the area.

What is the most common material used in DPC?

Rich Concrete is the most commonly used material in DPC. Usually, rich concrete in the proportion 1:2:4 that is painted with two relative coats of hot bitumen is used for the horizontal damp proof course. It is suitable for the portions of the building or structure that are not subjected to excessive damping.

What is mortar used for?

Mortar is extensively used for the vertical damp proof courses. Usually, 2cm thick rich cement layer and sand mortar (1:3) is applied on the inner surface of the external wall. After laying the mortar, the surface is painted with hot bitumen in two coats.

What is surface treatment?

Surface treatment includes the method of laying a water repellant layer or water-resistant substance on the surface through which dampness is likely to occur . It is the most common method of damp proofing when the moisture or dampness occurs superficially.

What are some examples of damp proofing?

The examples are mastic asphalt or a combination of materials or layers. The examples are first class bricks, stones, slates, cement concrete etc. Grout consists of cement slurry and acrylic based chemicals/polymers. The choice of a material to function as an effective damp-proof course requires a judicious selection.

What is damp proofing?

The damp-proofing of a building is done by interposing layer of damp-proofing material between source of dampness and building and this layer is known as Damp-Proofing-Course (D.P.C.). The principle of damp-proofing is to provide D.P.C. horizontally or vertically without any break and throughout the thickness of wall.

Why is dampness important in a building?

Dampness in a building is the main cause of the deterioration of the building as well as for the ill-health of the occupants . The damp brickwork in the buildings is prone to fresh attack.

What is the best material for damp proofing?

It material should be dimensionally stable. Material should be reasonably cheap. The material should be free from sulfates, chlorides, and nitrates.

What is damp proof course?

and hence in buildings, a layer of water repellent material called damp proof course (DPC) is introduced, which acts as a barrier against the capillary rise of water.

How thick is lead sheet?

The lead is a flexible material . The thickness of lead sheets should be such that its weight is not less than 200 N/m 2. The lead can be dressed to complex shapes without fracture, and it possessed high resistance to sliding action. It is impervious to moisture, and it does not squeeze out under ordinary pressure.

How to make mortar for bedding?

The mortar to be used for bedding layers can be prepared by mixing 1 part of cement and 3 parts of sand by volume. A small quantity of lime is added to increase the workability.

What is lead core?

This is known as the lead core, and it is found to be economical, durable, and efficient. 6. Stones. The two courses of sound and dense stones such as granites, slates, etc. laid in cement mortar with vertical breaking joints can work as an effective damp-proofing course.