Eldfast Ceramic Chimney Flue Re-lining compared with concrete in-situ lining by The Open Fire Centre, Oldham, Lancashire

From The Open Fire Centre - Oldham, Lancashire
Call direct on 0161 633 0929

$ELDFAST is a wholly ceramic material composed of two elements: a refractory ceramic aggregate in powder form and a resin bonding agent that together create a "slurry" with adhesive properties when applied under pressure.$

ELDFAST is a wholly ceramic material composed of two elements: a refractory ceramic aggregate in powder form and a resin bonding agent that together create a "slurry" with adhesive properties when applied under pressure.

Traditionally, only materials containing water, lime / clay mortar or cement have been available to re - parge a flue internally, these materials are now known to be prone to acid attack and deterioration.


Eldfast Lining 4mm thick		Concrete Lining restricts flue

Preserves Cross - Sectional Area:

Eldfast is an in - situ applied Flue lining, drawn up through the flue by means of a "plug", leaving a 4 mm nominal thickness of material on the flue face.
Systems employing an inflatable "sausage" inevitably drastically reduce the area of the flue.

Eldfast will follow the contours of the flue (although some rounding of corners is likely), rather than drastically reduce the free area.

Follows Chimney Contours

As shown left and above left, Eldfast will follow the contours of the flue (although some rounding of corners is likely), rather than drastically reduce the free area.
This is of particular benefit when wishing to retain future usefulness of the fireplace for open fires (requiring a minimum 8 inch / 200mm cross sectional area) or when dealing with smaller flues such as pre-cast flues

Comparison with in-situ concrete lining:

Concrete re-lining, carried out by, for example Thermocrete and Cico, employing inflatable tubular formers have been around for many years and performs well. Eldfast, however, has a number of significant benefits:
The Eldfast former replicates the original shape of the flue rather than creating a tubular shape.
The wall thickness at approximately 4mm is much less than the concrete liner.
Both these result in much less loss of capacity.
There is no need to break into the flue to align the former so no damage to walls.
The ceramic material does not use water so no damp walls.
The ceramic lining material actually cures, vitrifies, and strengthens with high temperatures.

Minimal Disturbance to Decor

Eldfast is designed to be installed without the need to break into the flue externally, this is due to the "plug drawn" method of installation.
Usually in - situ systems require brickwork to be removed at regular intervals to centralise " formers" and enable lining around bends in the flue.

Increases Updraught

Due to the ceramic nature of the Eldfast, a chimney will gain advantageous properties following re-lining:
The refactory aggregate acts as an insulator, keeping the temperature of the gasses passing through at a higher level and therefore reducing the likelihood of harmful condensation within the flue.

Also as the material fills over jointing and missing parging within the flue providing a gastight surface, dramaticaly improving updraught as a consequence of its smoother gas passage.

Approvals:

Approved by Hetas

Specified by NHBC

Exceeds current and planned European specifications.

Temperature Impervious

Results achieved under practical test conditions demomstrated that the ceramic product showed no signs of deterioration at temperatures approaching 2000 degrees centigrade; instead, it would vitrify and become stronger / harder.
A chimney fire may generate 1100 degrees centigrade. Eldfast flue lining is guaranteed to withstand it.