What is a chimney cowl?

Chimney cowls are clever metal ventilators installed above your chimney pot. They work to prevent chilly down drafts. They also stop smoke from being blown back into your living space. Chimney cowls aren’t a requirement, so adding one is completely optional.

What is the difference between a chimney cowl and a chimney cap?

**A cap** usually sits on the pot as a cover with mesh. Meanwhile, **a cowl** often has a more specific aerodynamic or fuel-type design. Both help protect from rain, down-draught and birds, but an [experienced installer](https://www.checkatrade.com/blog/chimney-cowl-fitters-near-me/) can advise which fixture suits your chimney best.

What factors affect the cost of chimney cowl installation?

The [amount you pay for a chimney cowl installation](https://www.checkatrade.com/blog/cost-guides/chimney-cap-installation-cost/) will depend on a few factors including: - **Size of chimney** - Larger chimneys will need larger cowls - **Type of cap or cowl** - **Quality of cap or cowl** - **Accessibility** - If your chimney is difficult to access, this may increase the cost of labour - **Scaffolding** - If [scaffolding ](https://www.checkatrade.com/blog/cost-guides/cost-scaffolding/)is needed to fit your chimney cowl, this will push up the cost of installation

How long does a chimney cowl last?

A quality stainless steel or aluminium cowl fitted and maintained properly should last many years. That said, weather exposure, corrosion, and roof movement can all affect the lifespan.

Do chimney cowls come with a warranty?

Many cowls and accessories often come with a standard manufacturer’s warranty of around **two years**. Your installer will be able to tell you if your new chimney cowl is covered by a warranty, and for how long.

Will fitting a cowl require me to update my chimney liner or flue?

You don’t always need to update your chimney liner or flue when fitting a cowl. However, if the fitter discovers your liner is cracked or blocked, you may need additional work.

When is the best time to fit a chimney cowl?

As soon as you notice issues like **rain ingress, downdrafts, bird nests or odours** you'll want a fitter round to take a look. It’s often easier to schedule in chimney cowl installation in the milder months, but many fitters will carry out work year-round.

Can I install the chimney cowl myself?

If you’re considering fitting a chimney cowl yourself, first ask yourself whether it’s safe for you to climb onto your roof. This is a risky job. If you struggle with mobility, or don't have the right safety equipment for working at height, we’d recommend hiring an[ experienced chimney cowl fitter](https://www.checkatrade.com/blog/chimney-cowl-fitters-near-me/). It will save you alot of time, energy and worry.

How to find the best chimney cowl fitters in [location]?

To help you find checked and reviewed chimney cowl fitters in [location], consider these tips: - Check online reviews to determine their reputation and quality of work - Verify their public liability insurance, so you know they’re covered against any potential accidents or damages - [Get multiple quotes](https://www.checkatrade.com/post-a-job) from at least three tradespeople so you can compare prices and services - Use Checkatrade and **hire one of our approved members that have undergone up to 12 checks** so that you can hire with confidence

chimney cap installation in Thornbury (50)

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Hastings Roofers
9.96
(9 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Chimneys Repair
Roof Lights Repair
Dry Verge Repair
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Home Guard Roofing
9.90
(13 reviews)
Operates in Thornbury
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Roofer
Chimney Cowlings Installation
Chimneys Installation
Felt Roofing Installation
Polycarbonate Roofing Repair
Call
Global Roofing and Property Maintenance
9.55
(151 reviews)
Operates in Thornbury
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Roofer
Chimney Cowlings Installation
Roof Lights Repair
Flat Roofing Installation
Roof Lights Installation
Call
FSG Roofing
10.00
(77 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Polycarbonate Roofing Repair
Polycarbonate Roofing Installation
Felt Roofing Repair
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Home Guard Roofing
9.90
(13 reviews)
Operates in Thornbury
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Roofer
Chimney Cowlings Installation
Fibre Glass Roofing Repair
Hot Melt Roofing Repair
Fibre Glass Roofing Installation
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HW Roofing
9.83
(21 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Slate / Tiled Roofing Installation
Felt Roofing Installation
Chimney Cowlings Repair
Call
KC Roofing Specialists
8.81
(51 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Ridged Tiles Installation
Asphalt Roofing Repair
Roofing Repairs
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J & R Roofing Services
9.80
(38 reviews)
Operates in Thornbury
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Roofer
Chimney Cowlings Installation
Warm Roof Construction
Sealoflex Roofing Installation
Fibre Glass Roofing Repair
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Total Roof Care
9.97
(36 reviews)
Operates in Thornbury
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Roofer
Chimney Cowlings Installation
Dormer / Roof Windows
Hot Melt Roofing Installation
Leadworks Repair
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Hastings Roofers
9.96
(9 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Roofing Repairs
Slate / Tiled Roofing Installation
Flat Roofing Repair
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Brunel Roofing and Property Services Ltd
10.00
(350 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Polycarbonate Roofing Installation
Hot Melt Roofing Repair
Slate Roof Installation
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Pinewood Building
9.89
(60 reviews)
Operates in Thornbury
Services & skills
Roofer
Chimney Cowlings Installation
Balcony Roofing Repair
Balcony Roofing Installation
Dry Ridge Repair
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Top rated chimney cap installations in Thornbury

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Our chimney cap installations in Thornbury are rated an average of 10 out of 10 based on a sample of 201 reviews from customers like you*

*This review aggregate is based on real customer reviews from a randomly selected postcode in this area

Find Chimney Cowling Installation in Thornbury

Is your chimney letting in downdrafts or rain? Fitting a chimney cowl is the answer. A cowl sits on top of your chimney pot to:

Keep out rain
Limit cold drafts escaping into your home
Stop backflow of smoke
Help with ventilation

Read on for everything you need to know about chimney cowling installation covering Thornbury – including costs and hiring tips.

Rather we do the searching for you? Try our quick request a quote feature and we’ll put you in touch with chimney cowling installation services covering your local area.

What does chimney cowl installation involve?

Hire an experienced fitter and they'll take the following steps to fit a chimney cowl:

Working at height (sometimes with scaffolding), your installer checks that the flue is suitable and the top is clear of debris
A suitable cowl is selected (size, fuel type, and finish are all considerations)
Cowl is fitted either by slipping into the flue or fixing with straps and adhesive (depending on the manufacturer guidelines)
The fit-out is checked for safe mounting and correct ventilation

How much does it cost to install a chimney cowl?

Expect to pay between £214 and £859 , with an average cost of £445.

For more chimney cowl prices and information, visit our chimney cap installation cost guide.

Do you need scaffolding to fit a chimney cowl?

You don’t always need scaffolding. For many single-storey or easily accessible roofs, a ladder and roof-access method might do the trick.

However, for taller properties or difficult to reach roofs, scaffolding is needed.

Tip: Make sure to ask your fitter ahead of time whether scaffolding is needed and whether the costs will be included in their quote.

Who will fit a chimney cowl?

Roofers and qualified chimney sweeps can help with a chimney cowling installation.

Hire using Checkatrade’s free directory and you’ll know your fitters will have the right experience.

Will a chimney cowl stop rain entering my flue?

Yes – one of the main perks of fitting a cowl is that it helps prevent rain and debris entering the chimney, which can lead to damp and odours.

Why use Checkatrade?

Fully checked installers covering your local area
Insurance always listed
Easy to compare multiple profiles
Handy reviews from local customers
Covered by the Checkatrade Guarantee (T&Cs apply)

Looking for more tradespeople in Thornbury?

Find Checkatrade reviewed Tradespeople, get a quote today, discover related services in Thornbury and check out our latest home improvement guides.

chimney cap installation in Thornbury (50)

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Hastings Roofers

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Home Guard Roofing

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Global Roofing and Property Maintenance

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FSG Roofing

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Home Guard Roofing

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HW Roofing

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KC Roofing Specialists

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J & R Roofing Services

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Total Roof Care

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Hastings Roofers

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Brunel Roofing and Property Services Ltd

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Pinewood Building

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Find Chimney Cowling Installation in Thornbury

What does chimney cowl installation involve?

How much does it cost to install a chimney cowl?

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