advantages of cavity walls
TRANSCRIPT
ADVANTAGES OF CAVITY WALLS
PRESENTED BY :MOHD KHALID SHAIKH : 120770106114GITANGALI PANDEY : 120770106115MANAN SETH : 120770106116
SUBMITTED TO : BUILDING CONSTRUCTION DEPT.CIVIL DEPT. , 4TH SEMSOCET2014
OBJECTIVESOBJECTIVES
– Benefits of cavity walls over solid walls.Benefits of cavity walls over solid walls.– Name different components used in cavity walls Name different components used in cavity walls
and there use.and there use.
Main functions of walls
1.Strength
2.Stability
3.Weather exclusion
4.Thermal Insulation
5.Sound Insulation
6.Durability
7.Fire resistance
8.Appearance
Part of a cavity wall with the internal skin removed to expose the Insulation
CAVITY WALL:
• Cavity walls consist of two 'skins' separated by a hollow space.
• The skins are commonly masonry such as brick or concrete block.
• Masonry is an absorbent material, and therefore will slowly draw rainwater or even humidity into the wall.
• The cavity serves as a way to drain this water back out through weep holes at the base of the wall system or above windows, but is not necessarily vented
CAVITY WALL INSULATORS :
• Cavity wall insulation is used to reduce heat loss through a cavity wall by filling the air space with material that inhibits heat transfer
CAVITY WALL INSULATORS :
• The Government regards cavity wall insulation as one of the most effective energy saving measures that you can carry out to your home and as well as saving you money it helps reduce emissions of carbon dioxide, the main greenhouse gas causing climate change.
• This is because up to 35% of the heat loss from your property is through the walls.
Return corner of a cavity wall in stretcher bond including wall ties and DPC
WALL TIES :
• Wall ties ensure that the wall leafs do not Wall ties ensure that the wall leafs do not part away from each other, effectively part away from each other, effectively splitting the two leaves. The normal splitting the two leaves. The normal spacing of the ties is laid down in the spacing of the ties is laid down in the Building Regulations.Building Regulations.
Wall Ties
There are a large variety of different types of wall ties, but they all have two basic requirements of:-
1 .Tieing the outer and inner leaf of the cavity wall together.
2 .Prevent moisture passing from the outer to the inner skin of brickwork.
Cavity walls in block construction
Cavity walls in brick construction with insulation
Advantages of Cavity walls.Advantages of Cavity walls.
• The moisture cannot enter from outer wall to The moisture cannot enter from outer wall to inner wall , since there is no direct contact.inner wall , since there is no direct contact.
• Provide good insulation aganist sound.Provide good insulation aganist sound.• Protection aganist efflorescence.Protection aganist efflorescence.• Proves economical during construction.Proves economical during construction.• Load on the foundation is reduced.Load on the foundation is reduced.• Reduction of heat transfer ,since air layer Reduction of heat transfer ,since air layer
between leaves acts as non-conductor of between leaves acts as non-conductor of heat.heat.