Chimney & Flue Liner Sweeping
We sweep all types of chimneys and flues with sweeping access.
Why Should I Have My Chimney Swept?
There are several important reasons to have your chimney or flue liner regularly swept when in use.
Prevention of chimney fires.
Soot is unburnt fuel. It can re-ignite given the right conditions.
When a build up of soot is heated to its ignition temperature it will create a fire that can extend the entire length of the chimney or flue liner reaching high temperatures as air is drawn in at an increasing rate from the fire opening or stove.
This is an obvious fire risk to the property and can seriously damage the masonry of the chimney or the steel of a liner, making them unsafe for further use.Typical chimney fire outside view
View from below of a chimney fire in action, the soot has ignited (high temperatures can be reached)
Diagram of how a chimney fire starts
Prevention of blockages
Blockages can be caused by soot building up or falling in a place along the flue length where it may hinder the flow of the flue gases. Or obstructions within the flue caused by bird nests, wasp nests and even bees nests. Brick or other masonry may have been displaced causing an obstruction to the flow of flue gases.
This may be indicated by difficulty in lighting or keeping the fire alight and/or smoke flowing into the room where the fireplace is situated. In the case of birds nests you may see bird activity at your chimney pot or twigs in your fireplace. (see cowls & guards)
Blockages can happen suddenly as in the case of a soot fall blocking the flue whilst the fire is alight, sending dangerous gases and heat into the property.Chimney blocked by soot build up
Stove stainless steel flue liner blocked by soot
Birds nest blocking chimney flue
Prevention of corrosion
Soot contains sulphur.
Whilst the soot is dry it has a limited corrosive effect.
However when soot is moist or wet usually caused by condensation forming inside the flue or rain ingress (see chimney cowls & bird guards) a weak sulphuric acid is created and over time this will corrode cement, brick and stainless steel (stainless steel liners sometimes only several years) to a point where the flue fails to operate in a safe manner.Corroded masonry chimney
Stove stainless steel flue liner corroded
Chimneys can be brick masonry with or without a cement interior coating, clay preformed sections, precast concrete chimney systems, flexible stainless steel liners or solid stainless steel twin wall chimney systems.Unlined brick masonry chimney
The internal cement coating has either worn away or was not included in the construction
Clay preformed sectional chimney
Modern flexible stainless steel flue liner
Sweeping Open Fires
Usually seviced by a brick masonry or precast clay/cement chimney ranging from 8" up to 24" diameter depending on the age of the building and the requirements of the open fireplace. Modern house chimneys are normally constructed with a precast chimney system of clay or concrete.
Open Fires Sweeping Methods
Open fires are swept using either traditional brushes that come in a variety of diameters and stiffness to match the requirements of the chimney flue being swept or are power swept using specially designed rods and sweep heads to suit the chimney being cleaned.Standard professional sweeping brush used for masonry brick and clay/cement precast chimneys
Large power sweeping head used for masonry brick and clay/cement precast chimneys
Sweeping Stoves & Log Burners
Stoves can be fitted to a masonry chimney or precast chimney system if the chimney is in good condition (requires a smoke pressure test and full inspection) and the stove manufacturer indicates it is allowed. The internal diameter of the chimney can be larger than the recommended stove flue size causing a slowing and cooling of the flue gases which in turn can lead to poor flue draft and substantial increases in deposits (soot & tar), in these instances it is best to have a stainless steel flue liner installed within the chimney.
Stoves/Log Burners Sweeping Methods
Power sweeping is the new technology in cleaning stainless steel flues. Specially designed rods and sweep heads by "Rodtech" are inserted into the flue until the top is reached. The rods and head are then spun up to speed using a clutched cordless drill and steadily drawn down the flue pipe, the strands act like a gentle wip removing deposits as they rotate downwards. A powerful fully filtered vacuum attached at the stove end ensures all particulates are safely captured and stored for later disposal.Professional power sweeping head being inserted into an Aga stoves flue pipe
Stainless steel flue liner power sweeping heads for various liner diameters
Power sweeping rods are designed with smooth edges so as to not harm your liner in any way
The removal of soot and other obstructions will help prevent dangerous chimney fires, ensuring compliance with your buildings insurance terms & conditions. We provide you with a dated certificate of sweeping as required by your buildings insurance.
- Open Fires
- Wood & Coal Burning Stoves
- Rayburns, Parkrays & Agas
- Gas Flues
- And all other types of flue where provision has been made for sweeping
We know how your fire works
HETAS registered installers are trained and approved to UKAS standards and can self certify that their work complies with the relevant building regulations.
You can rely on courteous and expert cleaning, repairs and installations, carried out in accordance with national regulations and to the very highest of safety standards, ensuring that no hazardous gases escape into your home and no potentially dangerous soot build-ups are overlooked.
If you would like any further information about any of our services, please feel free to give us a call. We will be happy to offer you advice over the phone and a free quotation.