Category Archives: closure plates

How To Install A Register Plate

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1. Fitting a wood burning stove does not require a professional to do the installation, but it is recommended by us at ChimFit. All work must however comply with part J of the building regulations.

2. This is a simple guide from ChimFit on how to install a stainless steel register plate, other heating appliances and flue manufacturers may have different instructions for their products and so, if in doubt, read their instructions where possible.

Install a steel frame to hold the chimney register plate. The register plate’s purpose is to stop loose objects falling from inside the chimney into the fireplace and helps keep the wood burning stove clean as well. Another benefit is that it keeps the flue insulation in place. It closes off the chimney stack and stops any smoke getting back into the room. The register plate must be be made of a non-flammable material and fit round the wood burning stoves flue pipe while blocking off the opening to the chimney stack.

Some people use fire proof board for register plates because it is easy to cut to measure, very light and easy to position. Many people prefer however to buy a pre-cut steel register plate with access panels. Which once again Chimfit can recommend a retailer for; this is useful in case of a requirement to get access to the chimney for cleaning and other needs.

Register plates can be bought from a supplier that Chimfit can recommend. You will need to install a frame or some other means of holding the register plate in place however. The next step is fitting the stove pipe to the top of the wood burning stove. Having measured the distance from the top of the stove (inside of the flue outlet) to a point at least 1 cm above the top of the register plate frame, you can cut the flue liner and the wood burner stove pipe to length.
An adapter is used to join the top of the flue pipe to the bottom of the flexible flue. Sit the flexible liner into the adapter and make sure it is located centrally. Tighten the adapter to hold the liner in position and to secure the adapter to the liner.

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The register plate can now be fitted into the steel frame. The offcut of the stove pipe can be used as a template by drawing a line round it. This circle can be cut out using a jig saw for example. This is done for the two parts of the plate surrounding the stove pipe and straight lengths are fitted to fill any gaps. Fire cement can be bought from Chimfits recommended retailers. Seal the joints and gaps of the register plate with some fire mastic.

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Register Plate or Closure Plate?





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A closure plate and a register plate are two different items used for the installation of stoves. A closure plate is used when you have a chimney liner (flexible) the closure plate closes the chimney to be cosmetic, this stops old soot dirt and moisture dropping on the stove and to stop heat disappearing up into the chimney. If the closure plate developed a fault, smoke could NOT enter the room. A closure plate can be made of any non-combustible material. A register plate is used when there is no chimney liner and acts as a barrier to the smoke and fumes in the chimney – it must make a sturdy seal between the room and the chimney and it MUST be made of galvanised or stainless steel (or other non-rusting metal) at least 2mm thick.

A register plate would usually have access doors to allow the sweep to access any chamber above it to remove fallen soot.

Why do closure plates need to be made of metal? That is because if a register plate failed then smoke could enter the room where the stove is burning. (e.g.) if a brick fell from inside of the chimney.

It is uncommon these days that liner are not fitted (although stove flue pipes might be connected directly to pot lined chimneys) and therefore register plates are less common on new installs. Modern wood burners are highly efficient and this means that LESS heat goes up the chimney. It is the heat that gives the draft (hot air rises and the hotter then the faster it rises).

The more efficient the wood burning stove the less heat is wasted up the chimney and the more likely that a liner, will be what the stove requires to function correctly.