Do you need the services of a demolition company in lagos or anywhere in nigeria? Do you want to lease equipment used for building demolition? Call us today 08061164526!

Demolition is the tearing-down of buildings and other structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for re-use.


For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, Cranes, Excavators or Bulldozers.

Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods.

Newer methods may use rotational hydraulic shears and silenced rock-breakers attached to excavators to cut or break through wood, steel, and concrete. The use of shears is especially common when flame cutting would be dangerous.


Things needed for demolition

1.....Experienced demolition company
2.....Explosives
3.....Blasting caps
4.....Cord
5.....Fuse
6.....Evacuation plan
7.....Designated emergency area
8.....First aid kit
9.....Fire extinguishers
10...Sledge hammer
11....Steel cutters

Site preparation:

Before a demoliton is done you must
Advise utility providers about the demolition and request that all services be turned off, including water. If electricity and water are needed for demolishing the building they should be moved to another location until the job is completed.

Survey the premises for anything considered hazardous, flammable or potentially explosive and safely remove it from the site. If asbestos is found, follow proper disposal procedures. Clear the structure of any debris.

Assemble the necessary safety equipment, including respirators, face masks, safety goggles and ear plugs.

Set up a make-shift emergency area that is equipped to handle minor injuries. Personnel certified in first aid training or a member of the American Red Cross should be stationed on site, along with a first aid kit.

Establish a fire plan that includes procedures for exiting the building in case of an emergency.

Clear all access ways, especially those leading to fire hydrants.

Notify the public when the building will be demolished and ensure their safety by setting up barricades around the site.

Demolition Methods
Demolition methods can vary depending on the area where it will be held on, the building material, the purpose of the demolition and the way that debris is going to be disposed.

1..Implosion:
Implosion is a violent bursting inward that allows the sequential elimination of structure supports. Enough explosives are used to eliminate the critical vertical structural supports. The placement of the charges and the sequential detonation timing is if vital importance, allowing the collapse of the building induced by the weight of the structure. Implosion demolition methods are used in urban areas and often involve large structures.

For a successful demolition a complete set of structural blueprints must be analyzed to study the main component of such building. Also another important step is to have the blaster crew complete an assessment of the structure of the buildings to identify other areas that need to be blasted, in addition to the ones identify on the blueprints. As a final step is important to decide the type of explosives to use, where to position them in the building and how to time their detonations.

2..High reach arm

https://www.youtube.com/watch?v=JCZdk65iePU
High reach arm is another traditional method of demolition. The threshold for defining a high reach demolition is when it reaches a height of more than 20 meters.

This method is usually formed by a base machine (excavator, tank, engine, counterweights), a demolition arm consisting of three sections or by a telescopic boom and a primary tool attached to the base machine (crushers, shears, hammers).

High reach demolition machines can be equipped with different tools to make them suitable for executing demolitions of structures. This method is used on reinforced concrete, masonry, steel and mixed material structures.

The machines used in this type of demolition are not the only machines used in the process; there must be additional components used for secondary operations such as crunching of material. Several factors control the method like the height of the structure being demolished, site conditions and structure shape.


3...Crane and ball

One of the oldest and most commonly used methods for building demolition, the ball and crane use a wrecking ball weighing up to 13,500 pounds to demolish concrete and masonry structures. During the process, the ball is either dropped onto or swung into the structure that is to be demolished. The ball and crane, however, is unsuitable for all demolition applications. Some limitations:

Additional work removing rebar in concrete structures is needed.
Only highly skilled and experienced crane operators should be used on ball and crane demolition

Smoothness in controlling the swing of the ball is CRITICAL since missing the target may tip or overload the crane.
The size of the building that can be demolished with this method is limited by crane size and working room, including proximity to power lines.
This form of demolition creates a great deal of dust, vibrations and noise.

4...Selective demolition

Also known as strip-out, this process is very popular right now. As recycling and salvaging of material are very attractive to builders during these days, allowing them to re-use material or recycle it. Selective interior / exterior demolition or recycle of wood, brick, metals and concrete are all recycled for future use in new structures blending the old with the new. This demolition process is not limited to removal of interior equipment, walls, floor, ceilings and exterior components. The main purpose of this method is to recover the maximum amount of primarily reusable and secondary recyclable material in a safe and cost-effective procedure. Although it is a labor intensive process and can be very difficult to achieve in a timely and economical manner for light framed buildings.

The different type of demolition method mention above like every other method has its effectiveness,limitations,advantages,disadvantages and conditions for it to be the best choice for company as a method of demolishing building.

Factors responsible for the choice of demolition method used

1. Type or nature of building
2. The area the building is located
3. The proxymity between the building and other buildings around
4. Environmental laws
5. Technology available
And lots more.
In nigeria the method that is used regularly is high reach arm.

An hydraulic breaker excavator

These machine is use for breaking of concrete,rocks etc
Ideal for breaking of any concrete part of a building:concrete floor etc

See picture below

Motor crane

Motor crane: another equipment of high importance when demolishing building more than two stories.

Motor crane has a telescopic boom that extends to certain height in meters.it is use basically to help hold certain part of the building from falling.

current demolition project we submitted quote for and demolition plan.building is in Victoria island behind eko hotel

Describtion of build-two block of well constructed building
with concrete exterior wall,marble,terrazo floor,slab roof, and pile foundation.

Block A: dimension

Block B: dimension



proposed demolition plan

More list: https://www.safeandsanitaryhomes.org/house-demolition-guide/