At least 36 inches of clearance must be allowed between the top of a stove and an unprotected ceiling.
You must have a non-combustible hearth or flooring that extends at least 18 inches in front of the stove and 8 inches past the sides and back. If any sparks escape the stove or the flooring gets too hot, this clearance can protect against fire.
3-2-10 Rule Explained
Explained, the chimney pipe must be a minimum of three feet above the roof but also two feet taller than anything within ten feet.
NFPA requires 48" from the top of a stove to a combustible ceiling. This can be reduced by use of proper protection. Some newer stoves call for less clearance, as small as 3 feet. As always, consult the manual for newer and listed stoves.
The reduction is specified by NFPA and most codes. For example, when required clearance with no protection is 36 inches, a 3 1/2-inch-thick masonry wall with ventilated air space used as a wall protector, reduces clearance by maximum of 66 percent, to 12 inches from the combustible wall.
Air gaps and wood stoves
Sometimes they are “recommended”. Usually recommendations for distances to non-combustibles are between 5cm and 15cm. To combustible materials we are looking at far more (often 40-80cm).
The industry's solution for heat shields
PermaBASE cement boards are the industry-preferred choice. Installation-ready and easy-to-use, PermaBASE® cement boards eliminate the need for field fabrication, saving time while allowing for enhanced performance and wood-burning stove placement closer to the wall.
Ceiling Clearances
That is:Top clearance = 82 inches – height of stove ( 30 inches ) Required 52 inches from top of stove to ceiling. Uncertified Stoves require 60 inches clearance from top of stove to ceiling.
The National Fire Protection Asso- ciation (NFPA) has developed standards for clearances from walls and ceilings that are the basis for many local building codes (Table 1). All combustible materials, wood- work, unprotected walls, furniture, firewood, etc., should be no closer than 36 inches to a wood stove.
The following are general minimum clearances for ranges: 1 ½ inches to nearest adjacent sidewall above the cooktop on both sides. 30 inches between the cooktop and a cabinet. 0 inches for sides below the cooktop.
Building Regulations recommend a minimum flue height of 4.5m however the chimney must be high enough to allow for enough draught to clear the exhaust gases.
The chemicals used can release dangerous amounts of arsenic and other very toxic compounds into your home. Note: Even if you find 2x4s that aren't treated, avoid using them as firewood – they burn incredibly hot, which can be dangerous and damaging.
It stipulated that the “appliance” must be mounted 18 inches above floor level. To be sure, the height of the appliance's pedestal or legs was being factored in as part of the appliance.
Using PermaBASE Cement Board as a wall protector in between the stove and the combustible wall materials allows you to shrink that distance by 40% or down to 14".
The minimum clearance required directly above the location of the cooktop is 750 mm (30 inches) from the level of the cooktop burners or elements to framing, finishes and cabinetry.
How much space to leave around a wood burner? For non-combustible materials, the typical minimum distance or clearance required from the front and rear of the stove's external surface to surrounding walls is 150mm. This clearance requirement is for both freestanding stoves and wood burners installed within a recess.
This information can often be found on the back of the appliance, as well as in the stove manual. The distance specified will vary between different woodburners, depending on their heat output and other factors, but typical advice would be a gap of more than 400mm around your wood-burning stove.
Local building codes dictate the legal minimums for clearances to combustible materials like wood framing or panels. These mandated wood-burning stove air gaps are much more significant, usually 12 to 18 inches on the sides. Building codes don't regulate gaps for non-combustibles.
Wood frame walls covered with dry wall are considered combustible. If no wall protection is used, the common radiant-type stove or heater must be spaced out at least 36 inches from the wall. This distance may be reduced considerably if asbestos millboard and/or 28 gage sheet metal is used for wall protection.
The good news is that most modern models of Wood Stoves are able to be put closer to walls than earlier models. While older stoves needed as much as 36”, newer stoves can be put as close as 6” to combustible walls with no additional protection needed.
Standards: DUROCK Cement Board is listed by Underwriters Laboratories, Inc., for use with UL-listed solid-fuel room heaters and fire- place stoves.
You should use a stove board that is UL Certified for Safety. This means it was laboratory tested under various conditions to meet safety standards for wood-burning stoves. The decision to use Type 1 or Type 2 rated pads depends on how much heat protection you need.