If you are thinking of building a house, then one thing that matters a lot in any house or building is the doors of that house, in such a situation it is necessary that what should be the rough opening of the door.

Determining the right size **rough opening** for any size door is quite easy. To find out the correct size rough opening, all you need to do is add 2″ to the width and 2-1/2″ to the length of the door frame size, and the size you get is the correct size rough opening for your door.

Since the door has to be jammed with the column. So always remember that the rough opening should always be 2″ more than the width of the door, and the rough opening should be 2-1/2″ more than the length of the door.

## What is Rough Opening

Apart from the size of any standard size door, the size which is increased by increasing the size of the door, that entire size is called a rough opening. The rough opening has an extra 2″ in width and 2-1/2″ in length plus the size of the door. So that the door frame can be easily fitted and the door can be opened easily.

Rough opening is essential for all types of doors whether it is the folding door, sliding door, or pocket door. Yes, there may be slight variations in the standard size of rough openings for different door types. But this change will not be so significant that we have to discuss it separately.

### Standard door Rough Opening

If you want to know about Standard **Door Rough Opening**, then read this article till the last. You can also find the standard rough opening of your door size, for this, you just have to add 2 inches to the width of your door and 2.5 inches to the length, now the size in front of you is the standard size rough opening for your door. Is. Let’s understand it with an example. Suppose your door size is 36″ × 80″ then the standard rough opening of your door will be.

= (36+2) × (80+2.5)

= 38″ × 82.5″

So, the **Standard rough opening** is 38″ × 82.5″ for your door.

### Rough opening for 24″, 28″, 30″ 32″ 34″, and 36″ Door

The height of the door varies in different countries of the world. But the width of the door is the same so in this article, we will take the height of the door as 80″ for further calculations.

**Rough opening for 24 inch Door**

The door size is 24″ × 80″, where 24″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 24″ Door** = (Width + 2) × (height + 2.5)

= (24 + 2) × (80 + 2.5)

= 26″ × 82.5″.

For a 24″ door rough opening is 26″ × 82.5″.

**Rough opening for 28 inch Door**

The door size is 28″ × 80″, where 28″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 28″ Door** = (Width + 2) × (height + 2.5)

= (28 + 2) × (80 + 2.5)

= 30″ × 82.5″.

For a 28″ door rough opening is 30″ × 82.5″.

**Rough opening for 30 inch Door**

The door size is 30″ × 80″, where 30″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 30″ Door** = (Width + 2) × (height + 2.5)

= (30 + 2) × (80 + 2.5)

= 32″ × 82.5″.

For a 30″ door rough opening is 32″ × 82.5″.

**Rough opening for 32 inch Door**

The door size is 32″ × 80″, where 32″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 32″ Door** = (Width + 2) × (height + 2.5)

= (32″ + 2″) × (80″ + 2.5)

= 34″ × 82.5″.

For a 32″ door rough opening is 34″ × 82.5″.

**Rough opening for 34 inch Door**

The door size is 34″ × 80″, where 36″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 34″ Door** = (Width + 2) × (height + 2.5)

= (34 + 2) × (80 + 2.5)

= 36″ × 82.5″.

For a 34″ door rough opening is 36″ × 82.5″.

**Rough opening for 36 inch Door**

The door size is 36″ × 80″, where 36″ is the width of the door and 80″ is the height of the door.

According to the rule, we have to add 2 inches in width and 2.5 inches in height to the door.

So, the **rough opening for a 36″ Door** = (Width + 2) × (height + 2.5)

= (36 + 2) × (80 + 2.5)

= 38″ × 82.5″.

For a 36″ door rough opening is 38″ × 82.5″.

### Door rough opening chart

Door Size | Rough opening |
---|---|

24″ × 80″ | 26″ × 82.5″ |

28″ × 80″ | 30″ × 82.5″ |

30″ × 80″ | 32″ × 82.5″ |

32″ × 80″ | 34″ × 82.5″ |

34″ × 80″ | 36″ × 82.5″ |

36″ × 80″ | 38″ × 82.5″ |

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#### Conclusion:

In this article, we learned what should be **rough opening for doors** of different sizes and **what is rough opening** and w**hat is the importance of a rough opening**.

##### FAQ

**What is rough opening for 32 inch door?**

For 32 inch door rough opening should be 2 inches extra wide from the actual door width and 2.5 inches extra tall from the actual height of the door.

**What is the rough opening for a 30″ door?**

For 30 inch door rough opening should be 2 inches extra wide from the actual door width and 2.5 inches extra tall from the actual height of the door. standard rough opening for 30 doors is 32″ × 82.5″.