FAQs  

Do you have a query about our installation? Read our frequently asked questions and if you still have a question, we’d love to help you.
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Can I use cellulose insulation in brick and block buildings?

Cellulose insulation can safely take up and lose high humidity levels. However, it should not get soaking wet and therefore should be separated by a gap. We have other types of insulation that are suitable for masonry construction.

Can you insulate suspended timber ground floors?

Devana has developed the unique Retrovive system for insulated suspended floors. We only need to lift a few floorboards. The process is very quick and minimises any disruption but eliminates cold draughts extremely effectively.

Can I insulate my flat roof?

This depends on the situation. We cannot fill voids if it would block the ventilation. If you get in touch with us, we are able to analyse the risk of condensation and calculate the heat benefits of adding insulation.

Can I install cellulose insulation myself?

It is possible to install cellulose fibre in lofts yourself, however, it can take a long time doing it by hand. Devana can use a blown-in system that is very quick. We also install insulation in walls and closed-in roofs where our system achieves a total fill with good density, but this type of installation should only be carried out by an approved installer.

What is a ‘blown-in’ system?

A blown-in system is a process to install insulation. It’s extremely quick and pumps the insulation into spaces to ensure that they’re well filled at the right density to work at the optimum performance.

Why is airtightness important?

All new buildings have an airtightness test in order to determine air and heat leaking through the structure. Devana’s system of blowing cellulose insulation tightly fills spaces, therefore contributes to better airtightnes, resulting in better test results and less heat leakage.

Is cellulose insulation better than other insulations?

Devana believes that cellulose insulation is a great all-round high performing insulation material. Studies have shown that the cellulose system outperforms other insulations when measuring heat required to reach temperature and heat retained over time. In comparison of U-values, PIR foams can do better in heat loss calculations; however, it has very little thermal mass to retain heat. PIR foam production is also the worst type of insulation for carbon emissions.

Does cellulose insulation cause risk of fire damage?

Using cellulose fibre insulation can reduce your risk of fire, as it is fire retardant.

Can you insulate timber floors upstairs?

We can either blow in insulation from above or below for floors, depending on the situation. Cellulose fibre insulation is great for sound and thermal performance in floors.

How thick should loft insulation be?

Current regulation requires at least 250mm of insulation in lofts. As we can blow more in, we often install 400mm in order to ensure the best performance for little extra costs.

Can cellulose fibre insulation get wet?

Cellulose fibre insulation can absorb lots of moisture without a problem as it dries out over time. If it does get really saturated, the weight of the water can compact therefore not allowing it to insulate. It is very easy to pull out and install new material if this happens.

Can cellulose insulation be dangerous?

Cellulose fibre insulation is not dangerous. It is completely friendly, work-safe, and much safer than other insulation materials.

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