When the carpentry work for the roof of the roof annexes is completed and cleaned well, the electrician determines the electricity points on the roof according to the electricity plan for the project (if the roof is a horde), in case there are openings for air conditioning in the roof, whether central air conditioning or desert air conditioning, the air conditioning company shall identify these openings on the roof with the placement of the wooden box for these openings, noting that the air conditioning plan shall be prepared and approved in advance and in accordance with the construction and architectural plan of the project. The air-conditioning company is responsible for identifying these openings on the roof and placing the wooden box for these openings, noting that the air-conditioning plan is prepared and approved in advance and in accordance with the construction and architectural plan of the project, if there is a chimney for the kitchen or fireplace, they are also identified.

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If the air conditioning system requires the presence of air ducts inside the building, it must be ensured that there are no fallen bridges that hinder the extensions of these ducts, in the event that there are fallen bridges in the Horde roof, it is good to refer to the design office to dispense with these bridges and re-study the structural plan of the roof, because fallen bridges are a real dilemma that only becomes clear at the finishing stage.

If the air conditioning system requires air ducts inside the building "Dakt

After completing the identification of electrical points and air conditioning vents, the blacksmith proceeds with the reinforcing steel work for the roof, starting with the work of falling bridges (if the roof is normal) or on the perimeter of the building, then the main bridges of the roof are made, with the need to emphasize the contractor to adhere to all the details of the approved structural plans for the project. When there is a difference between the structural and architectural plans, the contractor must stop and refer to the design office, as well as when the air conditioning vents conflict with the structural plan, the designer or the air conditioning company is also referred to.

When the rebar bridges are completed, the horde is secured and placed on the roof according to the approved plan, after that the horde is covered with rebar, if the roof reinforcement is "slab" then the rebar work is proceeded according to the plan, with the need to emphasize the work of inverted bridges on the perimeter of the roof of the extension and on all openings for air conditioning and others, and it is recommended that it be at least 30 cm high and better 40 cm, there are those who only make inverted bridges on the perimeter of the roof of the extension and on all openings related to air conditioning and others, and it is recommended that the height of not less than 30 cm and better 40 cm. This is completely unacceptable, as the inverted bridge limits the creep of the tiles caused by weather factors when the tiles expand, in the event that the block "inverted bridge" is present, it cannot stop the creep of the tiles, but you noticeably see the appearance of cracks under the inverted bridges implemented with blocks, and this has negative effects on waterproofing works, as the creep of the tiles causes the waterproofing to tear and the result is weak points of the insulation that are a path for rainwater leaks. Also, the columns for the water tank canopy are planted, and upon completion of all reinforcing steel work for the roof, the supervising engineer comes to receive the reinforcing steel and write a report stating the approval of pouring concrete, and if there are observations, they are noted in the report and notified to the contractor to make the required modification.