Should you block an unused chimney?

A retired chimney should be sealed only at the top or bottom. This will allow air to pass through the chimney and help prevent problems caused by moisture. If your damper is near the firebox, you can use insulation to seal the chimney.

How do I block my old chimney?

If you want to seal your fireplace off for good, the easiest way to do so in a hurry is to cut out a foam insulation plug, place it at the bottom of your chimney, and caulk or weatherstrip it in place.

Should chimney pots be capped?

Those chimneys not in use should consider capping, helping to protect the chimney stack from damage where wind, rain and snow have helped them deteriorate over time.

Do unused chimneys need ventilation?

Unused chimneys not only waste a lot of heat, they also pose a potential damp problem as well as being a cause of smoking fireplaces and stoves. You should cap any unused chimneys with a flue ventilator.

Does rain come down the chimney?

Chimneys are subjected to extreme weather conditions such as rain, wind, and snow daily. Over time, these factors can cause structural breaches, leaving the chimney vulnerable to water and moisture damage. Rain can come down your chimney due to damage somewhere on its structure.

Can a blocked chimney cause damp?

Inadequate chimney stack ventilation We often get asked ‘can a blocked chimney cause damp’? The answer is yes, especially if there is little or no ventilation.

Can I block up my chimney?

There’s no problem blocking-up / plastering a redundant fire place, but you should ensure the chimney top is closed-off to water ingress plus it is best practice to vent the flue space so as to avoid condensation forming.

What is chimney flashing?

Chimney flashing is a type of roof flashing that creates a waterproof seal to protect your chimney and roof from water damage and penetration.