# How much clearance do you need for a chimney?

Table of Contents

## How much clearance do you need for a chimney?

R1003. Any portion of a masonry chimney located in the interior of the building or within the exterior wall of the building shall have a minimum air space clearance to combustibles of 2 inches (51 mm).

## How high should a wood stove chimney be?

three feet

HOW HIGH SHOULD A CHIMNEY BE? It should extend at least three feet above the highest point where it passes through the roof. It should be two feet higher than anything within a 10-foot radius, including the roof itself, overhanging trees, adjacent buildings, etc.

## Is there a minimum height for a chimney?

The minimum chimney height recommended for minimum performance of wood burning and multi fuel appliances is 4.5 m from the top of the appliance to the top of the chimney. It is best to position the chimney, so that it goes straight up as near to the roof ridge as possible.

## How close can stove be to wall?

36 inches

At least 36 inches of clearance must be allowed between the top of a stove and an unprotected ceiling. Brick or stone provide little or no protection for a combustible wall since they are good conductors of heat.

## Can chimney be too tall?

Chimney Height Rules A chimney that’s too tall can result in the heated air cooling off by the time it reaches the top of the chimney stack. This can create a negative pressure inside of the smokestack that pushes smoke and other gases back into the home.

## How far does an outdoor fireplace need to be from the house?

10 feet

Choose the location with safety in mind. Your patio fireplace should be located at least 10 feet away from structures and flammable materials. When this is not possible, such as in the case of a patio with a wood cover or a mature tree growing nearby, you will need to take additional precautions to reduce fire risks.

## How do you cover a space behind a stove?

Fortunately, there are such things called stovetop extenders. These are made of vinyl or stainless steel and can be easily installed to fill this unsightly gap between the stove and the back wall.

## What is considered a non combustible wall?

Examples of non-combustible materials include: a. Portland cement concrete, gypsum concrete (normally used in drywall or poured gypsum floor toppings), or magnesite (magnesium oxide) concrete having aggregates of sand, gravel, expanded vermiculite, expanded or vesicular slags, diatomaceous silica, perlite, or pumice.

## How tall should a chimney be in relation to the roof?

This applies for all masonry or Class A pipe chimneys. Where it projects above the roof, the chimney should be at least 3 feet tall, and at least 2 feet higher than anything within 10 feet of it including the roof, other buildings, & trees – this is called the 10′-3′-2′ Rule.

## How tall do you have to be to put a stove on the roof?

The second photo has a red line drawn approximately where the peak of the roof intersects the stove pipe, which I determined using a bubble level. You can see the two braces holding the pipe to the roof. The standard rule is 2 feet above anything within 10 feet. That is a fire code and is for all of the US.

## How tall does a 10 foot 2 foot roof need to be?

So, if the 10-foot, 2-foot rule requires us to measure 10 feet to the nearest roofline, or structure, then we can use the rise to calculate a height requirement. Back to our example, over a run of 10 feet, the roof would rise 40 inches. Additionally, per our rule, we need to add 2 feet, or 24 inches, giving us a total height of 64 inches.

## Why do chimneys have to meet the 3-2-10 rule?

It is widely known that masonry chimneys are required to meet the 3-2-10 rule. This rule means that they must extend 3 feet above the roof penetration on the shortest side, and the top of the chimney must be 2 feet higher than any portion of the building structure within 10 feet.

This applies for all masonry or Class A pipe chimneys. Where it projects above the roof, the chimney should be at least 3 feet tall, and at least 2 feet higher than anything within 10 feet of it including the roof, other buildings, & trees – this is called the 10′-3′-2′ Rule.

So, if the 10-foot, 2-foot rule requires us to measure 10 feet to the nearest roofline, or structure, then we can use the rise to calculate a height requirement. Back to our example, over a run of 10 feet, the roof would rise 40 inches. Additionally, per our rule, we need to add 2 feet, or 24 inches, giving us a total height of 64 inches.

## Where do you measure the clearance of a chimney?

Horizontal chimney clearance distance measurements are made between the building surface (roof or nearby wall or other nearby roof surface) and the nearest facing surface of the chimney side. Above: metal chimney minimum roof clearance illustration adapted from Dura Vent installation instructions cited just below. [Click to enlarge any image]

## How tall does a stove pipe have to be above the roof?

If the pipe is farther than 10 feet from the roof peak, it must be 2 feet above the highest point of the roof within 10 feet.