Description
Colt Top All Purpose Chimney Cowl Reliable protection in changing wind and weather
The Colt Top All Purpose Chimney Cowl is a premium anti-downdraught chimney cowl designed to help improve chimney performance, reduce rain entry and discourage birds and animals from entering the chimney. Its rounded aerodynamic profile is engineered to create lift from changing wind directions, helping smoke and flue gases travel upwards rather than being pushed back into the property.
- Suitable for gas, oil and solid-fuel applications
- Fits 125mm–250mm internal diameter chimney pots
- Wind-tunnel-tested aerodynamic design
- Bolt and strap fixing kits supplied
- Helps reduce rain, bird and animal entry
- Terracotta and Buff Stone finishes available
A versatile chimney cowl for downdraught, rain and wildlife protection
Chimney downdraught can cause smoke, fumes, cold air and unpleasant odours to move back down a chimney. The Colt Top uses a rounded, aerodynamic shape to create lift as wind passes over and around the cowl. Because the profile is effective across changing wind directions, it can help stabilise chimney draw in exposed or unpredictable conditions.
The broad top also helps divert rainwater away from the flue, reducing the risk of water entering the chimney and contributing to damp patches, soot falls, staining and deterioration inside the stack. With the correct mesh configuration, the cowl can also help prevent birds and larger animals from entering the chimney.
Multi-purpose chimney protection in one proven design
The Colt Top combines anti-downdraught performance, rain protection and practical fixing options in a robust cowl suitable for a wide range of domestic chimney installations.
Helps combat downdraught
The aerodynamic rounded top encourages wind to create lift above the chimney, helping smoke and fumes move upwards.
Effective in changing wind
Its shape is designed to work regardless of the prevailing wind direction, making it suitable for exposed locations.
Protects against rain entry
The broad top helps direct rainfall away from the chimney opening and reduce moisture entering the flue.
Discourages birds and animals
When the mesh is retained for an appropriate installation, it helps deter birds and animals from entering the chimney.
Suitable for multiple fuels
Available for gas, oil and solid-fuel installations, subject to correct appliance, flue and mesh requirements.
Secure fitting options
Both bolt and strap fixing kits are supplied, giving installers flexibility when securing the cowl to the chimney pot.
Colt Top chimney cowl specifications
Check the chimney-pot measurements and selected fuel type before ordering.
- Product type
- All-purpose anti-downdraught chimney cowl
- Suitable fuel types
- Gas, oil, wood, seasoned wood, coal and suitable solid-fuel applications
- Pot internal diameter
- 125mm–250mm (approximately 5–10 inches)
- Maximum pot external diameter
- Approximately 300mm
- Overall width
- 435mm
- Overall height
- 135mm
- Fixing method
- Bolt and strap fixing kits supplied
- Available colours
- Terracotta or Buff Stone
- Approximate product weight
- 2kg
- Testing information
- Designed and tested to BS 715:1993 as stated by the manufacturer
Watch the Genuine Colt Top in Action
Start with the main Colt Top demonstration, then explore three supporting videos covering birds and animals, smoke blowback and rain entry.
See why the Colt Top is trusted for all-purpose chimney protection
This featured product video introduces the genuine Colt Top All Purpose Chimney Cowl and explains how its aerodynamic, wind-tunnel-tested form helps stabilise chimney draw while protecting the flue from changing weather conditions.
- Understand the aerodynamic anti-downdraught design
- See the broad rain-deflecting profile
- Learn how the cowl supports upward flue movement
- Review its suitability for multiple domestic fuel types
See the Colt Top solving common chimney problems
These supporting videos explain how the correct chimney cowl can help reduce animal entry, smoke blowback and rainwater entering an open chimney pot.
Select and configure the cowl for the correct fuel type
The Colt Top is offered for a broad range of fuels, but the installation must match the connected appliance, chimney system and manufacturer guidance.
Suitable applications
- Gas-fuel chimney systems where the selected cowl is approved
- Oil-fuel chimney systems with suitable flue arrangements
- Wood, seasoned wood, coal and solid-fuel installations
- Open chimney pots affected by rain or wildlife entry
- Chimneys experiencing wind-related downdraught
- Round chimney pots within the stated size range
Important installation limitations
- Do not retain the mesh for solid fuel where soot could clog it
- Do not install on an oversized pot without the correct adaptor
- Do not assume a cowl will repair a damaged or blocked chimney
- Do not use without confirming appliance and flue compatibility
- Do not work at height without suitable training and equipment
- Do not ignore recurring smoke or carbon-monoxide concerns
How the Colt Top anti-downdraught design works
The cowl is shaped to use moving air around the chimney terminal to encourage upward extraction.
Wind reaches the cowl
Airflow approaches the rounded profile from the prevailing wind direction.
Air accelerates around it
The curved shape guides moving air around and over the cowl.
Low pressure creates lift
The airflow helps create an extraction effect above the chimney opening.
Flue gases move upward
Smoke and fumes are encouraged to discharge above the chimney rather than descend.
Flexible fixing for a wide range of round chimney pots
The Colt Top is supplied with both bolt and strap fixing kits. The appropriate fixing method will depend on the shape, dimensions and condition of the chimney pot, as well as installer preference and site conditions.
Before fitting, confirm that the chimney pot is structurally sound, correctly sized and suitable for the selected fixing. The cowl should be positioned level and secured so it cannot move during high winds.
Highly rated for quality, fitting and performance
A genuine Colt Cowl with a secure fitting system
Customer feedback repeatedly highlights the robust build, straightforward installation, prompt delivery and success in reducing downdraught.
“Sturdy and high quality product that does what it says and was easy to fit.”
“A well made quality product with a bomb proof fitting system.”
“No more down draft. Worth every penny.”
Colt Top chimney cowl FAQs
Answers to common questions about sizing, fuel suitability, downdraught, rain protection and fitting.
What is the Colt Top chimney cowl designed to do?
It is designed to help reduce wind-related chimney downdraught, encourage upward flue-gas movement, divert rain away from the chimney opening and discourage birds or animals from entering where the mesh is suitable.
Is the Colt Top suitable for all fuel types?
The product is offered for gas, oil and suitable solid-fuel applications. The correct option and configuration must be selected for the connected appliance and flue system.
Should the mesh be removed for solid fuel?
Yes. The product guidance states that the mesh should be removed for solid-fuel use because soot can accumulate and potentially block the mesh openings.
What chimney-pot sizes does it fit?
It is suitable for round chimney pots with an internal diameter from approximately 125mm to 250mm. The stated maximum external diameter is approximately 300mm.
What if my chimney pot is larger than 250mm internally?
A separate adaptor plate may be required for chimney pots with an internal diameter greater than 250mm. Measure carefully and obtain advice before ordering.
Does the Colt Top stop chimney downdraught completely?
It is designed to reduce wind-induced downdraught, but no cowl can guarantee a cure for every chimney problem. Blockages, inadequate flue height, poor ventilation, appliance faults and nearby structures may also affect chimney performance.
Can it help stop smoke blowing back into the room?
Where smoke blowback is caused by wind-related downdraught, the Colt Top's aerodynamic design may help. Persistent smoke entry should always be investigated by a competent chimney or heating professional.
Does it stop rain entering the chimney?
The broad rounded top helps channel rain away from the flue opening and can substantially reduce direct rainfall entering the chimney, although wind-driven moisture cannot always be eliminated entirely.
Will it stop birds nesting in my chimney?
For compatible installations where the mesh is retained, it helps prevent birds and larger animals from entering. Mesh should not be retained for solid fuel where soot blockage could occur.
What fixings are included?
Both bolt and strap fixing kits are supplied, allowing the installer to choose the most suitable method for the chimney pot and installation conditions.
Can I fit the Colt Top myself?
The fixing system is designed to be straightforward, but installation normally involves roof access and working at height. A competent chimney professional or suitably trained installer is recommended.
What colours are available?
The Colt Top All Purpose Chimney Cowl is available in Terracotta and Buff Stone painted finishes.
Is the finish suitable for corrosive fuel deposits?
The painted finish is described as highly resistant to corrosive deposits associated with fuels such as Coalite, Furnacite and anthracite. Correct maintenance and chimney sweeping remain essential.
How often should the chimney be swept?
Sweeping frequency depends on the appliance, fuel and level of use. Follow the appliance manufacturer's guidance and the advice of a qualified chimney sweep.
Will a chimney cowl fix every smoking chimney?
No. A cowl may help where wind-related downdraught is the cause, but chimney height, room ventilation, blockage, flue condition and appliance performance must also be considered.
Do I need a carbon-monoxide alarm?
Properties using combustion appliances should have suitable carbon-monoxide alarms installed and maintained in accordance with current regulations and appliance guidance.
Choose the genuine Colt Top All Purpose Chimney Cowl
Select the correct colour and fuel type above, confirm your chimney-pot measurements and order securely online for direct UK dispatch.
admin –
Really prompt service, and high quality product
admin –
Sturdy and high quality product that does what it says and was easy to fit.
admin –
Excellent service and delivery on time.
admin –
We are just waiting for the right weather conditions to see if it has fixed our chimney down draught problems.
admin –
With a chimney diameter of 300mm an adapter plate was needed. Although the final install is secure and seems to work the plate is much larger than required.
admin –
Exactly as advertised, easy to fit, waiting for bad weather to see if it functions as advertised
admin –
A well made quality product with a bomb proof fitting system
admin –
Not had the gas fire on yet. But hopefully this unit will stop the draft.
admin –
Good quality product.
admin –
I’am very much a Belt & Braces man and I was really impressed with the dual fixings. The cowl looks to be made to a high standard and fitted easily.
admin –
We haven’t fitted at the moment but looks very good quality
admin –
A genuine Colt Cowl product (you can tell the difference)
admin –
No more down draft . Worth every penny.
admin –
fitted very quickly and looks good
Richard C. –
GREAT product very quick delivery.
Stephen Temple –
Great
Ian C. –
It looks the part,easy to fit but not had any high winds to see if the noise issue is gone
Gerry Bremner –
Excellent product and excellent service
Marie Michael –
Excellent service.
Andrew R. –
Fast excellent services
Dave Williams –
Contacted seller with a few questions and received a reply within 20 minutes which is great service compared to some suppliers who sometimes take days to reply. I was told the cowl would arrive next day which it did. I haven’t fitted the cowl yet but it looks good quality
CCP –
Hi Dave, thank you for your kind feedback
Kind regards
Paul
Chimney Cowl Products