Some useful tips to repair the damage to the brick wall

This article throws light on brick wall damage due to frost & water along with cracking, spalling & white or coloured mineral salt deposits that is called effloresence.

One can get details about the types of damages to structural brick walls as well as how to identify & assess movement and cracks in brick walls together with brick wall bowing or bulging and cracking failures.

Water & Frost Damaged, Broken Bulging Brick Walls: Frost damage to the brick wall happens because of roof spillage that passes through the building wall. Water penetrates the space behind the facing wythe of bricks on the wall and it leads to continuous frost-push and risk of falling of at least the exterior parts of the wall.

Cracked Bricks in Strutural Building Walls

If there are cracked bricks in the exterior walls, leaks occur at the abutment of balcony as well as to the building structure.

Efflorescence: white, yellow, brown deposits on brick walls, chimneys, foundations

Efflorescence is the white mineral deposits on a structural brick wall caused by water.

The task is very difficult to control roof runoff to retain water from flowing over building walls particularly on bigger, taller buildings where entry to sustain the gutter system is not possible.

Spalling Brick Building Walls: The brick spalling occurs owning to roof spillage and rain splash-up against the foundation wall. The frost spalling create damage to the brick wall, particularly around the building windows.

The brick surface gets damaged (surface spalling and loss of the hard glazed finish) because of weathering, water and salt exposure that results in producing more severe frost damage that involve cracking and frost "pop out" of sections of individual bricks or entire brick portions of the structure.

Water & Frost Damaged Brick Foundation Walls, Loose Bricks

There may be rigorous water and frost damage to the corner of a brick building, perhaps from roof spillage at the end of a gutter that was periodically chocked.

To settle these bricks against further movement and probably more serious foundation damage, a mason should be employed to repair the corner with a combination of reconstruction of the most-loose (or missing) bricks, and tuck pointing the leftover open mortar joints.



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Published By
Rajib Dey
www.constructioncost.co
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Some useful guidelines for constructing parapet wall

Parapet wall stands for a protection wall that can resist the collapsing from terrace to ground. Different types of parapet walls are found which range from brick wall masonry parapet wall, wooden handrail, iron grill etc.

Size of parapet wall:

1. Thickness of parapet wall should be minimum 9''. (full brick parapet wall)
2. Half brick parapet wall is not recommended for use.
3. Height of the parapet should be minimum 3'0''.

Once the centering and shuttering from roof slab bottom is detached, some deflection may happen at mid span of roof slab (positive bending moment). Similar thing will happen at support like negative bending moment.

With a view to prevent negative bending moment at support, huge amount of loads are required as downwards. In case of constructing the parapet wall as half brick wall, the roof can’t be prevented from uplifting. If the parapet wall is constructed as minimum 9'' thickness and minimum 3'0'' height, the roof slab can be prevented from uplifting. Therefore, different types of cracks at bottom of ceiling will be captured. To get rid of uplifting of roof, the centering & shuttering should be eliminated once the entire full brick parapet wall is constructed.

If the first floor is extended in future, the existing parapet wall should not be dismantled in case the wall is constructed as 9'' thick.

Assume, the parapet wall is constructed as half brick wall, now it is required to demolish the current parapet wall up to roof and make it as 9'', therefore, extra money will be incurred up to sill level of first floor.

While erecting half brick parapet wall, brick pillars should be arranged at regular interval ( 5 to 6 feet). Inner surface of parapet wall does not include flat surface since lots of offset will be created. Therefore, some problems will arise in waterline and sanitary plumping works.

Water from pump and discharge from water tank will be influenced with various offset produced with half brick parapet wall.

No tie exists for half brick parapet wall. As a result, wind pressure may provide some effects. Sliding of parapet wall may also happen.

If the column height is terminated for the height of the parapet wall (3 feet), it is required to dismantle for overlapping in future first floor construction. Adjacent Brick parapet wall will also be affected. If the height of parapet wall remains 3 feet, the column height should be increased for extra height for future overlapping. Then the column and parapet wall will be protected from over damaged.

Conclusion:
It is recommended to construct full brick parapet wall for minimum height of 3 feet devoid of half brick parapet wall.
There should be some provision for column for future overlapping.



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Published By
Rajib Dey
www.constructioncost.co
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Some useful construction tips for installing brick cladding toward a drainage cavity wall

This construction video will highlight step by step processes to set up brick cladding for a drainage cavity wall.

Brick cladding refers to an outer facing in support of a structure that is formed with brick. Cladding generally contains the outer coating of a building, the layer of a structure that safeguards the inward. Brick cladding is developed for the purpose of shedding and preventing water to stop the flow of water to the internal framing of the building. This resists the possibility of damage to the framing due to mold and mildew. It also keeps water away from entering the inside of the structure, maintaining the interior dry.

Cladding is also useful for consuming some impacts, and to offer some insulation. The various layers of a building are formed partly to trap air and maintain temperature unchanging by making an insulating block. If the layers of insulation are increased, the requirement for managing climate will be decreased as the climate control is developed with the structure. Impacts like high winds and collisions with object can also be consumed partly through the cladding that in turns safeguards the structural elements of a building.

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Published By

Rajib Dey

www.constructioncost.co

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