Existing roof of the proposed building is a flat reinforced concrete slab, detailed structural assessment of the slab is recommended and retrofitting must be done if required to enhance structural safety. 

According to "Berlin Climate report" the temperature in Berlin can fall up to -2.5 degree Celsius in winter and can rise up to 25 degree Celsius in summer. To offer comfort to the building residents and to conservate energy, it is recommended to provide high performance thermal insulation above RCC slab. The thermal insulation will increase thermal resistance of RCC slab to a greater extent and result in energy savings.

The cross section image as shown is the recommended thermal insulation system for the proposed project flat roof.  The 180 mm flat roof  (1) is  covered by a 3mm vapor barrier (2) to prevent moisture. On top of which is 60 mm Rigid mineral wool boards (3) are placed which provide core insulation, the insulation is put in place by nails (4) into RCC slab. A protective layer  (5) of 20 mm is provided enhances durability, while the weather-resistant surface (6) of 3mm thickness, shields the over all insulation from environmental elements. This layered design ensures excellent thermal performance and moisture control.

The internal finishes of the proposed building are designed to offer sustainability and low maintenance costs, contributing to a green and cost-effective living environment.

it is recommended to used carpet flooring for rooms and wooden tiles for lobby as they offer soft surface. the proposed building is a multi story residential building and will house more then 200 people, carpet flooring in rooms and wooden tiles in  lobby will reduce noise pollution, more over they are easy to clean and cheap to replace and are also easy to recycle. 

 For kitchen and washroom flooring, ceramic and porcelain tiles are recommended as they are easy to clean and can withstand physical impact up to greater extent and are widely available in different color, texture and size.

As proposed internal wall are soft partition wall thus it is recommended to use plaster board as finishing material as they offer sound insulation, moreover to create contrast in internal design eco friendly  water proof wall paper shall be used. wall papers cheap widely available, easy to install and support easy cleaning thus reduce maintenance cost.

Partitions walls of washroom and kitchen shall be furnished with pvc panels to prevent water seepage into  walls; 

Existing Mechanical services are outdated and  are in poor condition, it recommended to replace all existing services to provide comfort, safety and energy efficiency to consumers. Provision of advanced mechanical systems in the proposed project will greatly enhance living experience by optimizing heating, ventilation, air conditioning  and protection against fire hazard along with efficient plumbing systems. 

Following are the proposed Mechanical systems for the proposed project.

1. Smart HVAC systems.:

Such modern systems with smart thermostats and zoning capabilities allows for precise temperature control and energy savings by learning residents' schedules and preferences, adjusting heating and cooling automatically to maximize comfort and efficiency.

2. Energy Recovery Ventilation (EVR):

Insufficient ventilation can lead to the growth of mould and interior air pollution, raise the possibility of airborne infection transmission.(The Building Regulations, L2A, 2010). With airtight construction a building needs ventilation to provide fresh air to occupants, REHVA states that chances of spreading of the SARS-CoV-2 virus increases by recirculating internal building air the( Federation of European Heating, Ventilation and Air Conditioning Associations).

An EVR system is the only ventilation system capable of providing a building with 100% safe fresh air (also known as "hygiene ventilation") while preventing heat loss. A modern EVR system may reduce the need for heating by around 30% while also significantly improving the quality of air indoors. 

3. Tankless Water Heaters: 

tankless water heaters provide hot water on demand, reducing energy consumption and ensuring a continuous supply of hot water. 

4. Low-Flow Plumbing Fixtures,  Advanced Fire Protection Systems, Radiant Floor Heating and Solar Water Heating are some mechanical systems recommended to use for the proposed project. 

• German Buildings Energy Act (Gebäudeenergiegesetz, GEG), contains information on the building and its heating, as well as on the property's energy performance indicators.

• Existing plumbing system is out dated and is in poor condition, it is recommended to use efficient plumbing systems in proposed project for ensuring a smooth flow of water and waste, optimizing water usage, and minimizing the risk of leaks or pipe bursts.  Such leaks can lead to further rise of ground water table, resulting in structural problems. 

Following are recommended plumbing system for the proposed project. 

1. Installation of high Efficiency fixtures and appliances such as  Low flow toilets, Water saving faucets and efficient shower heads.

2. Smart Plumbing Systems such as  Sensor Technology,  Automated Controls and  Real time monitoring.

3. Water Recirculation Systems including Continuous hot water,  Reduce Waiting Time, Energy and  conservate water.

4. Eco Friendly Plumbing Materials and Grey water recycling systems  will reduce usage of potable water for flushing.  

such systems will ensure and eco friendly and energy efficient plumbing system.