Does Metal Ductwork Need to Be Insulated?

Metal ducting is ideal for ventilation systems set up in hotter environments, an example being a cooker hood. Metal ducting is also a popular choice for spaces and environments with air rich in certain compounds that could be hazardous or damaging to standard choices.

HVAC experts and engineers typically choose to rely on stainless steel for aggressive environments, where corrosion is highly likely.

We provide round ductwork fittings and accessories in a large range of diameters to suit all purposes including HVAC systems and extractor fans. Our metal ductwork is manufactured from high-quality galvanised Aluminium.  

The benefits of metal ducting are as follows:

• It can be used in rooms that have appliances that emit a lot of heat
• High-quality galvanised aluminium ensures long-lasting function
• Ideal for industrial environments
• Can be insulated.

Does metal ductwork need to be insulated?

Yes, in most cases metal ductwork should be insulated.

The naturally hot and dry climate within a duct naturally makes it difficult for mould to thrive if a duct becomes unsealed. If there is a dramatic change in the duct’s environment that causes humidity, mould can grow within it.

To prevent this possibility, you must make sure your ducting is sealed securely and free from any cracks or holes that compromise its efficiency. You must also make sure the area the ducts are installed is free from free-flowing water or leaks.

One of the most effective options to help your ducting maintain a mould-free environment is by applying duct wrap insulation. As the UK’s leading provider of ducting, it is only natural that we also offer duct wrap insulation.

Our Duct wrap insulation helps to control condensation build-up and heat loss. In cooler areas of the property such as roof cavities and lofts up to 30% of the heat can be lost, resulting in increased heating bills.

Our fire-rated duct wrap is manufactured from 25mm or 50mm thick Rockwool/ fibreglass and is 1.2m in Width x 13.5m per roll. It can be used on internal and exterior applications when used with an appropriate weatherproofing jacket.

You must make sure your ducting is sealed securely and free from any cracks or holes that compromise its efficiency. You must also make sure the area the ducts are installed is free from free-flowing water or leaks.

What happens to a duct if it grows mould?

If ducting has mould growing within it, it presents a dangerous health hazard as the spores can spread amongst the whole ventilation system and the dwelling it operates in. As a result, you may have to completely replace the venting system/ ductwork depending on the severity.

Does all ducting have to be insulated

Ducting should be insulated at its joints to avoid any leakage as standard. Ducting throughout the house does not have to be insulated unless it is in an unconditioned room, such as a basement.

Having insulated ducting in unconditioned areas avoids condensation. Aside from the insulation we offer, there is some ducting that comes pre-insulated.

Are Metal ducts the best?