You will have the full **list of materials to build a 12×12 room**, and the breakdown of the different construction activities.

Next we will see the step by step, to know how much material you need to build a 12 by 12 room.

## List of Materials to Build a Room of 4 × 4 Meters and 2.40m Under Roof

**The lists of materials you need to build a room** are calculated separately, and at the end, a list of summary materials is offered.

### How many square meters does a 4×4 room have?

A 12 by 12 feet room can have between 145 and 150 square feet of net area, depending on the layout of the walls and columns and the thickness of the walls (thickness of blocks and plaster).

12x12ft room, staking out walls to axis | 159 sq ft |

12x12ft room, staking out interior face walls | 172 sq ft |

12x12ft room, staking out walls on the outside | 147 sq ft |

### How much Material do I need to Build a 12×12 ft Room with h=7′ 10” (Formwork)

Formwork Summary | U/M | Qty. |

Wood on a 1×8” board | m³ | 0.74 |

Wood in a 1×2” piece | m³ | 0.16 |

Wood in a 2×2” piece | m³ | 0.02 |

Wood in a 3×2” piece | m³ | 0.06 |

Wood in a 4×3” piece | m³ | 0.14 |

Wood in a 4×4” piece | m³ | 0.6 |

2 1/2” lace | kg | 9.98 |

3 1/2” lace | kg | 1.26 |

### How much Material is required to Build a 12×12 Room h=7′ 10” (Cement, Sand, Stone, Walls, Concrete)

**How Much Cement is Needed for a 12×12 feet Room**

Cement for 12×12 Room | U/M | Qty. | Bags |

Structural Cement (Concrete) | kg | 2135 | 85.4 bags of 25kg |

Masonry Cement | kg | 789 | 31.5 bags of 25kg |

Glue cement (Floors) | kg | 56.8 | 5.7 bags of 10kg |

White cement (Floor joints) | kg | 59 | 5.9 bags of 10kg |

**How many Cement Bags Required for 12×12 feet Room?**

**To build a 12×12 room, you need 117 25kg bags of gray cement.**

Aggregates and Masonry Summary | U/M | Qty. |

Marble dust | m³ | 0.30 |

Hydrate of lime | kg | 342 |

River sand | m³ | 0.37 |

Artificial sand | m³ | 6.68 |

Stone | m³ | 0.81 |

Gravel | m³ | 3.26 |

Ragstone (in running shoe) | m³ | 1.30 |

Water | liters | 1069 |

16”x8”x6” cement blocks | un. | 394 |

Ceramic tile | sqm | 15.0 |

**How many Bricks are required for a 12×12 Room**

In case of building with bricks, you should know how many hollow bricks you need to make a 12×12 room: **1820 bricks of 250x125x65mm (common 10”x6”x3” brick) are needed.**

If you need help, use this **BRICKS PER SQUARE METER CALCULATOR**.

### How much Material do I need to Build a 12×12 Room h=7′ 10” (Steel bar, Rods)

Steel Bar | U/M | Qty . |

3/8” rods | kg | 150 |

1/2” rods | kg | 211 |

5/8” rods | kg | 149 |

Tie Wire no.18 | kg | 4.9 |

### How much Material do I need to Build a 12×12 Room h=7′ 10” (Waterproof Foundations)

Waterproof Summary | U/M | Qty . |

Waterproof in Foundations | sqm | 10 |

### How much Material do I need to Build a 12 by 12 Room (False Ceiling)

False Ceiling Summary | U/M | Qty . |

Aluminum angles | ft | 48 |

Aluminum tee | ft | 166 |

2’x2′ false ceiling panel | un. | 49 |

1″ Reinforced Nails for Concrete | un. | 19 |

#16 Galvanized Smooth Wire | kg | 2.76 |

Pistol Pins | un. | 24 |

Gun capsule | un. | 24 |

### How much Material required to Build a 12×12 Room (**Electrical Installations**)

Electrical Installations Summary | U/M | Qty. |

Wire no.12 | ft | 115 |

Wire no.14 | ft | 100 |

Three way dampers | un. | 2 |

Simple contacts | un. | 3 |

Connection boxes | un. | 5 |

1/2” plastic pipe | ft | 82 |

### How much Material do I need to Build a 4×4 meter Room ( **Doors and Windows** )

Doors and Windows Summary | U/M | Qty. |

32”x80” door | un. | 1 |

48”x48” window | un. | 1 |

Do you need window ideas to place in your room? Here you can see some **MODERN WINDOW TYPES** and their characteristics.

### How much Material do I need to Build a 4x4m Room h=2.40m (**Paint**)

Abstract Painting | U/M | Qty. |

Interior vinyl paint 3 layers | liters | 2.5 |

Exterior vinyl paint 3 layers | liters | 2.5 |

4” Cell broaches | un. | 1 |

3” Cell broaches | un. | 1 |

Below are the graphic views of the 12×12 feet bedroom in 2D and 3D with measurements, so you can see and know at all times, the type of bedroom in which the calculation of materials is carried out.

**What Size Bed Fits in a 12×12 Room**

To find out, **WHAT SIZE BED FITS IN A 12×12 ROOM**, you can see these 4×4 meters plans with furniture and dimensions.

### Breakdown of the Material Calculation to Build a 12×12 ft Room

Let’s analyze this first example to find out how to calculate the materials for a 4x4m room and 2.40 meters under roof.

The sample views and the 2d and 3d model are presented, with isolated foundations (variant 1) and strip foundations (variant 2) and the entire concrete super-structure.

**Foundation Materials (with Isolated Footings)**

To build the isolated foundations the following is needed:

Foundation | Base | Volume | Qty |

Isolated foundation | 35”x35” | 0.99m³ | 4u |

Total | – | 0.99m³ | 4u |

**Materials for the Foundation (Beams) of a 12×12 Room**

For the foundation beams with 250 Kg/cm2 (m25) concrete, the following quantities of materials are used:

Foundation Beams | Section | Qty | Lengths | Volume |

Foundation beams | 8”×12” | 4u | 50 ft | 0.92m³ |

Total | – | 4u | 50 ft | 0.92m³ |

**0.19m3**of wood on a 1×8” board**0.06m3**of wood in a 1×2” piece**0.02m3**of wood in a 3×2” piece**0.14m3**of wood in a 4×3” piece**2.85kg**of 2 1/2” lace**0.53kg**of 3 1/2” lace**395kg**of structural cement**0.65m3**of sand**0.65m3**of gravel**195 liters**of water**45kg**of 3/8′ steel bar**37.5kg**of 1/2″ steel bar**61.4kg**of 5/8″ steel bar**1.4kg**of tie wire no.18

**Foundation Materials (with Strip Footings)**

With this foundation variant, it is not necessary to build reinforced concrete columns. However, you can make **CATALAN COLUMNS**, where the corner blocks are solid and reinforced with steel rods.

In general, the strip foundation can work better than the isolated foundation, for stable and flat terrain. If you can choose, this would be a good choice.

Strip foundation | Section | Qty | Lengths | Volume |

Cyclopean foundation | 16”×24” | 4u | 50 ft | 3.70m³ |

Brace footings | 8”×10” | 4u | 50 ft | 0.77m³ |

For the construction of **cyclopean foundations**, with 150kg/cm² (m15) concrete, the following amounts of materials are needed:

**770kg**of masonry cement.**1.91m3**of river sand.**1.99m3**of stone.**1.1m3**of small ragstones (3” to 6” stones).**385 liters**of water.**15kg**of 1/2” steel bars (protruding bars).

**Materials to Build a 4×4 meter Room (continuous footings)**

For the **continuous footings beams with** 250 Kg/cm2 (m25) concrete, which rest on the cyclopean, the following amounts of materials are used:

**0.12m3**of wood on a 1×8” board.**0.04m3**of wood in a 1×2” piece.**0.02m3**of wood in a 2×2” piece.**1.64kg**of 2 1/2” lace.**308kg**of structural cement.**0.52m3**of sand.**0.59m3**of gravel.**161 liters**of water.**37kg**of 3/8” steel bars (stirrups)**26.5kg**of 3/8” steel bars.**0.6 kg**of tie wire no.18.

Making a **comparison of the costs** of some materials, between the construction of the room with isolated foundations, and with continuous foundations, we have the following result, which can be useful to make better decisions.

**Column Materials**

For the 250 Kg/cm2 concrete columns, the following amounts of materials are used:

Columns | Qty | Volume | Section | Height |

Concrete columns | 4u | 0.27m³ | 6”×8” | 7′ 4” |

Total | 4u | 0.27m³ | – | – |

**0.10m3**of wood on a 1×8” board.**0.02m3**of wood in a 1×2” piece.**0.02m3**of wood in a 3×2” piece.**2.00kg**of 2 1/2” lace.**116kg**of structural cement.**0.19m3**of sand.**0.19m3**of gravel.**57 liters**of water.**15.8kg**of 3/8″ steel bars.**37.5kg**of 1/2″ steel bars.**0.6kg**of tie wire no.18.

**Roof Beams (Walls)**

For the beams or enclosures with 250 Kg/cm2 (m25) concrete, the following materials are required:

Enclosures | Section | Qty | Lengths | Volume |

Lintel | 6”×4” | 1u | 4 ft | 0.02m³ |

Beams | 6”×8” | 4u | 50 ft | 0.44m³ |

Total | – | 5u | 54 ft | 0.46m³ |

**0.12m3**of wood on a 1×8” board.**0.03m3**of wood in a 1×2” piece.**0.02m3**of wood in a 3×2” piece.**1.32kg**of 2 1/2” lace.**0.73kg**of 3 1/2” lace.**198kg**of structural cement.**0.32m3**of sand.**0.32m3**of gravel**102 liters**of water.**77.8kg**of 3/8″ steel bars.**0.7kg**of wire no.18 (to tie).

**Cinder Block Wall Materials**

Walls | Width | Area | Length | Qty |

16”x8”x6” Block walls | 6” | 340 sq ft | 50 ft | 4u |

Total | – | 340 sq ft | 50 ft | 4u |

For the placement of **CINDER BLOCKS** you will need:

**394u**of 16”x8”x6” blocks.**218kg**of masonry cement.**120kg**of Lime hydrate.**0.82m3**of sand.

In the calculation, the openings have been discounted.

If you definitely use bricks, you can see all the **WAYS TO PLACE BRICKS IN WALLS** and their characteristics.

**Finishing in Walls, Columns and Beams**

For the finishing of walls (60m²), with backsplash, plaster and stucco, you will need:

**426kg**of masonry cement.**45kg**of white cement.**0.30m3**of marble dust.**222kg**of lime hydrate.**1.95m3**of sand.

**Roofing Materials**

For the construction of the reinforced concrete roof slab with a strength of 250kg/cm² (m25 concrete), the following are needed:

Floors and Slabs | Thickness | Volume | Area |

Reinforced concrete cover | 6” | 2.40m³ | 172 sq ft |

Total | – | 2.40m³ | 172 sq ft |

**0.22m3**of wood on a 1×8” board.**0.01m3**of wood in a 1×2” piece.**0.60m3**of wood in a 4×4” piece.**2.34kg**of 2 1/2” lace.**1030kg**of structural cement.**1.69m3**of sand.**1.69m3**of gravel.**505 liters**of water.**136kg**of 1/2″ steel bars.**1.2kg**of wire no.18 (to tie).

You can also see **HOW MANY RODS ARE NEEDED FOR A SLAB** of any size.

**Floor Materials**

For the construction of the ceramic floor, with a 40mm mortar pre-floor, the following are needed:

Floors and Slabs | Qty | Area |

600x600mm ceramic floor | 1u | 153 sq ft |

Total | 1u | 153 sq ft |

**145 kg**of masonry cement.**161 sq ft**of ceramic slab.**14 kg**of white cement.**56.8 kg**of adhesive cement.**0.37 m3**of river sand.**0.34 m3**of artificial sand.**0.41 m3**of gravel.

**How much Material do I need to Build a 12×12 ft Room with Ceramic Tile?**

Cement | Sand | Hydrate lime | Cem. in Joints |

8.30 bags of 25kg | 0.4 m³ | 29.4kg | 21kg |

*Losses are included.*

To know the amount of materials to make a 4×4 meters floor, you can review this page with information on **HOW MUCH CEMENT YOU NEED PER SQM OF FLOORING**, depending on the type of floor.

Remember that each **HOUSE DESIGN** and each construction project have their own characteristics, which must be analyzed specifically.

This applies to conditions of land, if it is an extension, if it is planned to build on the second level later, among many other variables to consider.

If you have doubts, write it in the comments. See other **MATERIAL CALCULATIONS**.