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External duct installation at height from ground floor to roof.
We install extract flues, boiler flues and ventilation ducts up façades and light wells, firmly anchored and sealed, working on ropes from the roof with no scaffolding.
5/5 · Google reviewsWhen is an external duct needed?
- Premises with no flue to the roof
- Boiler or stove without a chimney
- Old duct that is loose or rusted
- Extraction that does not draw well
What the duct installation includes
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Route survey
We define the route, diameter and outlet to suit the appliance and the RITE.
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Twin-wall ducting
Stainless or galvanised steel, insulated where the use requires it.
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Brackets and clamps
Anchored to the façade at regular intervals so the duct does not vibrate or move.
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Penetrations and joints
Wall or slab penetrations and sealed joints to prevent leaks and drips.
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Roof outlet
Finished with a cowl above the roof line, away from windows.
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Discreet finish
Powder-coated or painted duct in the façade colour, if you wish.
How we install the duct
We visit the building, measure the route from the appliance to the outlet and check the façade and roof. You then receive a detailed written quote.
Working on ropes, we fix brackets and clamps and install the duct in sections from the bottom up, sealing every joint and wall penetration. A site manager coordinates the work with the business and the residents.
We finish with the roof outlet, check the draught and airtightness, and clear all debris from the pavement and roof.
Get a quote for an external duct
Frequently asked questions
01Can a duct from a ground-floor unit be taken up to the roof without scaffolding?
Yes. We install the duct in sections, working on ropes from the roof, without taking up the pavement with structures or closing the street.
02Does the duct have to come out above the roof?
For smoke and boiler flues, usually yes, at the height and distance from windows set by regulations. During the visit we check what your case requires.
03What do you do with the old duct?
We dismantle it in sections from the ropes, lower it carefully and take it away, then make good the old fixing points on the façade.
04How much does a complete renovation cost?
There is no single price. The estimate depends on the condition and size of the home, the scope of the project, materials and work required. Tell us your idea so we can assess your specific case.
05How long does a renovation take?
It depends on the type of home, the scope of the work and the project's constraints. Once we have studied the renovation, we can give you a more accurate estimate.
06Can a home be renovated while people still live in it?
It depends on the scope, estimated duration and condition of the home. When we study the project, we will assess whether it is feasible and what precautions or alternatives should be considered.
07How can I request an estimate?
Choose what you want to renovate, tell us whether the work is partial or complete, and leave your name, phone number and email. This lets us provide initial guidance. You can also write to us directly on WhatsApp.

About us
High-quality renovations, with deadlines that are met.
We renovate flats and houses in the provinces of Barcelona and Girona with clear planning, close follow-up and attention to every detail.
- Initial visit with no obligation
- Detailed and accurate estimate
- Follow-up until the work is finished
Need a duct run up the façade?
Message us on WhatsApp or get a quote: we will study the route and explain how we would install it.