Frequently Asked Questions

The most effective chimney pot to prevent rain entering is the H pot or alternatively, the Decorative Fuel Effect pot.

Due to the extremely large number of different types of gas fire available, we would recommend that the appliance manufacturer is contacted, to confirm which type of pot/terminal would be suitable for use with their appliance.

DFE

Any open pot is suitable for solid fuel.

This pot can be used for more than one type of fire. It can be used on a living flame or solid fuel.

There is no suitable insert to go on top of a crowned pot.

Flue vent, bonnet hood and mushroom hoods may only be used for redundant flues.

Fitting a flue vent will prevent the ingress of rain and birds and allow the flue to ‘breathe’. A flue may be totally sealed by the fitting of a blanked off pot

Builders Merchants or Roofing Merchants.

This pot does not give enough free air space.

Occasionally we can manufacturer special pots.

The best chimney pots to use to reduce downdraught are the H pot, Louvre pot and the Vortex pot.

Pots with multiple vents in the wall of the chimney pot can improve the operation of the fire by allowing smoke and flue gases to be drawn up the chimney faster. Select Sankey Pots and Vortex Pots. Bishop, Windguard and 3-bowl pots also provide extra ‘draw’ for fire efficiency

H-Pot

We generally deliver within 4 working days.

Flue liners should be laid with the socket of each section uppermost. This ensures that condensates and rainwater are not able to leak out from the flue into the surrounding masonry.

The joints between the liners must be made with flue liner jointing compound, or a fireproof mortar.

The cartridge contains sufficient cement to seal approximately four joints, based upon 225mm diameter flue liners.

For open fires with a standard fire opening up to 500mm wide by 550mm high the minimum required flue is 200mm diameter or a square flue having the same cross-sectional area and a minimum dimension of not less than 175mm. For fireplace openings greater than 500mm x 550mm, the flue liner size is based on a nominal cross-sectional area equal to 15% of the total face area of the fireplace opening.

The void could be filled with a weak insulating concrete such as mixtures of: one part Portland cement to 6 parts vermiculite; or one part Portland cement to 10 parts perlite.

Both the regulations and standards recommend that bends in the chimney be avoided as a straight vertical chimney performs better. If bends are necessary there must be no more than four in the length of the flue.

Where bends are used they should be angled at no more than 45°C to the vertical.

The fire clay we sell (Y137) has no cement content and becomes solid only when it is subjected to the heat of a fire. In using fireclay, the very minimum amount of water should be used to make the clay workable and heat should be introduced to it gradually to avoid cracking. We would not recommend using fireclay in any domestic heating application, such as jointing firebricks, due to the material being heat setting, and it would be virtually impossible in a domestic heating application to reach the required temperature for optimal performance.

No, fireclay must be mixed with water and is purely used to bond firebricks together.