# What size header do I need for 8′, 10′ 12′ 14′, and 16′ garage door

If you are planning to construct a garage then what size header do I need for a garage door and what should be rough opening for a garage door these two questions always come to your mind. Because a rough opening and perfect header size for the garage door are very important for any garage. In my previous article, I explained about rough opening for a garage door. In this article Im going to explain to you what size header do you need for a garage door.

Generally, the header is a horizontal beam that is placed on two walls. The header is made up of timber and Laminated veneer lumber (LVL). The header of a door is very important because the header carries the load of the above structure and transfers it into the walls. And the wall transfers all load in the foundation by using plinth beam.

## What size header do I need for a garage door?

The standard size of the header for a garage door is 9 inches longer than the door and the depth of the header (LVL beam) should be at least for a garage door is 8 inches. and the thickness of a garage door minimum should be 4 inches. This size of the header is only valid for garage doors because a garage door is larger than any door.

### What size header do I need for the 8′ garage door?

If talking about 8 feet of garage door that means the garage door width is 8 feet. For 8 feet wide garage door you will need 8 feet 9 inches long, 4 inches wide, and 8 inches depth header. Which make up of timber or laminated veneer lumber. The garage door is wider than the normal door. So the width and depth of the garage header should not be less than the standard size.

### What size header do I need for 9′ garage door

If talking about 9 feet of garage door that means the garage door width is 9 feet. For 9 feet wide garage door you will need 9 feet 9 inches long, 4 inches wide, and 10 inches depth header. Which make up of timber or laminated veneer lumber. The garage door is wider than the normal door. So the width and depth of the garage header should not be less than the standard size.

### What size header do I need for 10′ garage door

According to the thumb rule and general guidelines, for 10 feet wide garage door, you will need 10 feet 9 inches long, 4 inches wide, and 10 inches depth header. Which make up of timber or laminated veneer lumber.

### What size header do I need for 12′ garage door?

According to the thumb rule and general guidelines, for 12 feet wide garage door, you will need minimum 9 inch extra long header like 12 feet 9 inches. But for 12 feet garage door i will suggest you should use 12 inches extra long header like 13 feet. Header depth should be at least 12 inches, and header width should be 4 inches for 12 feet garage door.

### What size header do I need for 14′ garage door?

According to the thumb rule and general guidelines, for 14 feet wide garage door, you will need minimum 12 inch extra long header like 15 feet. Header depth should be at least 14 inches, and header width should be 3 inches but i will suggest you should use 4 inches wide header for 14 feet garage door.

### What size header do I need for 16′ garage door?

According to the thumb rule and general guidelines, for 16 feet wide garage door, you will need minimum 18 inch extra long header like 17.6 feet. Header depth should be at least 12 inches, and header width should be 5.25 inches for 16 feet garage door.

### What size header do I need for 18′ garage door?

According to the thumb rule and general guidelines, for 16 feet wide garage door, you will need minimum 18 inch extra long header like 17.6 feet. But i will suggest you should use 2 feet extra long header like 20 feet. Header depth should be at least 12 inches, and header width should be 5.25 inches for 18 feet garage door.

### What size header do I need for 20′ garage door?

According to the thumb rule and general guidelines, for 16 feet wide garage door, you will need minimum 24 inch extra long header like 22 feet. But i will suggest you should use 3 feet extra long header like 23 feet. Header depth should be at least 14 inches, and header width should be at least 5.25 inches for 20 feet garage door.