A selection of our most frequently asked questions & answers, however if you can’t find what you are looking for or would like further information then please call us on 01768 485050 or submit a request on our enquiry form.
How can I buy natural insulation?
Our natural and recycled insulation products can be ordered online with the exception of Steico Rigid Wood Fibre Insulation. Please contact us for details of how to order these products.
Phone: 01768 485050
Can I use my loft area for storage after insulating?
We would recommend installing loft legs over the joists and boarding on top of the loft leg. This ensures that you have an effective depth of insulation. Boarding directly onto joists will significantly reduce the thickness of insulation and therefore the overall performance. Find out more about loft legs
How do you maintain ventilation at the eaves?
The simplest thing to do is not to push the insulation tight against the roofing felt at the eaves level. In addition insert eaves ventilation trays to maintain the ventilation opening.
Are any of your products suitable for pitched rafters of a roof?
Yes. Thermafleece and Steico insulation are suitable in all roof applications. Please contact us for further details or see our roof applications guidance.
Should you insulate between joists or over?
You should insulate between joists and over joists wherever possible. Run the layer over the joists cross-ways to make sure no air gaps run through the insulation from the ceiling level.
How do I reduce noise from downstairs?
A number of measures are required to reduce noise from downstairs one of which is to install an absorbent insulation between the joists. Insulation such as Thermafleece can be used as an effective absorbent material. For depths of 100mm or greater Thermafleece CosyWool can be used. For depths of less than 100mm Thermafleece UltraWool will give the best performance.
What product can I use to achieve a 1 hour fire rated floor?
We sell products rather than specific systems, all of which are fire tested. Because a 1 hour fire rated floor is a system of products, you should consult the floor system supplier.
How do I reduce noise from next door?
To reduce noise from next door can be a very complex problem to solve. Specialist acoustic consultants can help. Natural fibre insulation such as Thermafleece can be used as part of noise reducing measures in a building.
Can you use natural fibre insulation with electrical wires and cables?
As with all insulation, electrical cables should be sufficiently rated if they are passing within insulation.
What is the lifespan of natural fibre insulations?
Natural fibre insulations that contains a binder such as Thermafleece will last the lifespan of the building.
How do natural insulations compare to other insulation materials?
Unlike man-made fibres, natural fibres are breathable meaning they can bind and release moisture and still be dry. This is a very important property when it comes to insulation because heat and moisture are very closely linked. Natural fibre insulation is better at absorbing heat which helps reduce summertime over-heating. They also provide excellent acoustic performance.
What is natural fibre insulation?
Natural fibre insulation uses the breathability and natural insulating properties of natural fibres. Therefore creating safe effective and sustainable insulation for your building. Natural fibres commonly used for insulation include, sheep’s wool, hemp and wood fibres.
Do interior walls need insulation?
You can use insulation in interior walls to prevent heat being lost into adjoining rooms. Insulating internal walls will also reduce the amount of noise moving from one room to another.
Can you add insulation to existing walls?
Yes you can add insulation to existing walls. However care must be taken to ensure that moisture doesn’t enter and become trapped within the insulation and wall. Please contact us for further advice.
Can insulation save me money?
Insulation can save you money as it prevents heat loss. Which in turn reduces the amount of energy used to heat your home. Finally reducing the amount it costs to heat your home. Insulation does many other things such as preventing your home from getting too hot in the summer and helps reduce the impact of sound. Breathable insulation such as Thermafleece can also help regulate humidity levels within the building fabric.
What is the best loft insulation material?
Certainly the best loft insulation for all round performance and true breathability; we would recommend Thermafleece British sheep’s wool insulation. However a cost effective alternative to traditional insulation (with a well ventilated roof); we would recommend SupaSoft recycled plastic bottle insulation.
What type of insulation is suitable for vegans?
SupaSoft Insulation, NatraHemp and Steico wood fibre products are suitable insulation for vegans.
SupaSoft Insulation is made from recycled plastic bottles, so SupaSoft doesn’t just save you money and cut carbon emissions but also helps reduce harmful plastic from entering the food chain.
NatraHemp is medium density insulation rich in home-grown hemp fibres. A safe, efficient and durable alternative when plant fibre is the preferred choice.
Steicoflex is a flexible insulation slab made from forest thinnings and saw mill residues. It is a high density product with good acoustic properties.
What does insulation do?
Thermafleece sheep’s wool insulation is multifunctional
- Reduces Heat Loss
- Improves acoustics
- Helps balance moisture and humidity
- Reduces summertime overheating
- Improves indoor air quality
- Impacts sustainability
- Determines fire behaviour
- Influences buildability
What is the delivery process?
All Natural Insulations delivery process information is available on our Delivery Page. However if you have further questions or have an order to place please contact the office on 01768 485050. We will be happy to help.
Why Should I use a Natural Insulation?
Why Natural Insulation:
- Are more thermally efficient than mineral fibre
- Use less energy and emit less CO2 in manufacture than mineral fibre (particularly Thermofloc)
- Are safer to handle than mineral fibre
- Have the ability to absorb and desorb moisture without losing their efficiency
- They can store CO2 during growth (hemp)
- Help UK farmers find a market for their sheep wool (Thermafleece)
- At the end of their (long) life compost or incinerate for energy use
- Thermofloc makes use of recycled newsprint
Can I lay natural or recycled insulation on top of existing mineral wool insulation in my loft?
All our insulations can be laid on top of existing insulation, even Thermofloc, which is a loose insulation made from recycled paper.
Do I need to insulate my loft hatch?
Yes, something like 5% of heat is lost through your loft hatch, so it should be insulated.
I want to insulate a sloping roof. Are your natural and recycled insulation suitable?
Yes, all our insulations are suitable but with an existing roof you must leave a 50mm air gap between the roof tiles and the back of the insulation.
Can natural and recycled insulations be cut easily?
Thermafleece and SupaSoft insulations can be cut using a straight edge and a Stanley knife, an insulation cutting knife or simply torn apart.
For more accurate cutting, tightly compress or clamp the insulation between two pieces of solid 15mm board. Overhangwhere you want to cut keeping the two board edges aligned. Saw cut the edge using an insulation cutting knife or another sharp, scalloped edged knife and keep the blade firm and square against both board edges throughout. Trim any fine remaining fibres with large scissors or shears.
Are any of your insulations suitable for cavity walls?
No, there is too much moisture in the cavity for a natural insulation.
Can I get a government grant for home insulation?
Whether you can get a government grant for home insulation depends on your local authority. Each local authority has its own independent scheme (or not as the case may be), and the only way to find out is to ask. You could also follow our link to the Energy Saving Trust (www.est.org.uk) which can can give you an idea of which grants you may be eligible for if you type in your postcode.
Sheeps wool insulation FAQs
How is thermafleece sheep’s wool insulation made?
Do you want to know how thermafleece sheep’s wool insulation is made? Take a look at The Campaign for Wool video. It will show you the thermafleece production process from start to finish.
Can I use thermafleece insulation in cavity walls?
Thermafleece insulation can’t be used as insulation in cavity walls of brick and block or block and block. It can be used within timber frame walls or within a frame on the inside of a solid wall.
What are the environmental benefits of sheep’s wool insulation?
The environmental benefits of sheep’s wool insulation are many. At Thermafleece we use the coarse coloured wool from hardy hill sheep which would otherwise go to waste to make our thermafleece sheep’s wool insulation. All our wool is British and we manufacture in Yorkshire, the home of British Wool.
Each kg of natural fibre locks up about 2 kg of carbon dioxide which helps remove CO2 from the atmosphere. Furthermore, once installed in your property Thermafleece will last the life of the building significantly reducing the impacts of replacement and repair.
Thermafleece is breathable, allowing a healthy moisture balance which helps protect the building fabric and health. It helps your building stay warm in colder months, helping to reduce energy bills whilst the higher thermal mass buffers the heat to reduce overheating in summertime. It is very effective at lowering sound levels within the building and is itch free, safe and easy to install.
For further information contact us on 01768 485050 or email firstname.lastname@example.org
What is the density of Thermafleece?
The density of Thermafleece varies from 18kg/m3 to 32kg/m3 depending on the product. To clarify refer to product fact sheets for details – available to download from our product information pages.
What is the best acoustic insulation?
Sheep’s wool is the best acoustic insulation. Because of their irregular surface, shape and density, natural fibres such as sheep’s wool are very effective at disrupting sound. That’s one of the reasons why sheep’s wool insulation can provide acoustic performance comparable to the best mineral fibre products.
How does the thermal performance of Thermafleece compare to other insulation?
Thermal performance of Thermafleece CosyWool is approximately 10% more thermally efficient than low density glass fibre insulation. Thermafleece UltraWool is more than 20% efficient
How does Thermafleece react to fire?
Thermafleece will not contribute towards the developmental stages of fire. Thermafleece sheep’s wool insulation complies with British Standard BS 5803-4 for flammability and resistance to smouldering.
Why does Thermafleece need a synthetic binder?
To ensure that the insulation maintains its shape throughout its service life Thermafleece uses a synthetic binder. There are no natural materials available that can do this. Consequently every effort has been taken to ensure that the virgin polyester content is kept to a minimum.
Do I need protective clothing to install sheep’s wool insulation?
All the insulation we supply is completely safe to handle. However, because lofts are inherently dusty places, we would always recommend using protective equipment when working in a loft.
Recycled insulation FAQs
How many plastic bottles does it take to insulate a loft?
It takes an average of 10,000 waste plastic bottles to produce enough SupaSoft to insulate a typical loft. That’s 10,000 plastic bottles that would otherwise have been buried in landfill, incinerated or left to litter the environment.
‘Let’s stop using things once and start dealing with the legacy we have created. SupaSoft Insulation provides a long term use for waste plastics that helps reduce home energy at the same time’ – Eden Renewable Innovations Ltd
Is recycled plastic insulation suitable for campervan conversions?
Yes, SupaSoft is an insulation suitable for campervan conversions. Place between the campervan panels or simply lay on top of existing van insulation to improve overall insulation performance. SupaSoft insulation is an open non-woven material that allows water vapour to pass through the insulation and does not support mould growth.
Why use recycled plastic insulation?
SupaSoft is a sustainable, recycled plastic bottle insulation that is good for your home, your family, and the environment. Perfect for lofts, SupaSoft offers a long term solution to deal with the legacy of waste plastic, most of which comes from single-use applications.
SupaSoft Insulation is a low energy alternative to Rockwool and fibreglass. Totally safe to handle and it can be installed by the DIY home-owner or a professional. Moreover it will not need to be replaced and lasts the lifetime of the building.
All our SupaSoft Recycled Plastic Insulation is manufactured locally in the UK, supporting local enterprise. In addition helping to reduce the carbon emissions that arise when transporting bulky materials long distances.
How long does SupaSoft Insulation last?
SupaSoft is made from recycled PET (polyester) and is extremely durable. Because the binder is made from PET it does not degrade or slump over time. This means that SupaSoft will last the life of the building so once installed there is no need to replace.
Is there a cost effective alternative to fibreglass?
Insulating with SupaSoft recycled plastic bottle insulation is a very cost effective alternative to fibreglass or other mineral insulation. In addition the energy it saves means SupaSoft insulation quickly pays for itself.
I already have some insulation in my loft but it is not very thick, will this have to be removed or can it be topped up?
You can lay SupaSoft on top of existing insulation although the amount of additional insulation will depend on how much existing insulation is in place and what condition it is in. For instance, if the insulation is in very poor condition we would recommend adding 250mm of SupaSoft on top. However if the existing insulation is in very good condition, add sufficient SupaSoft to achieve a total insulation thickness of 270mm. Check under and around existing insulation for any signs of damp or water damage.
What is the recommended thickness for loft insulation?
The recommended thickness for loft insulation for an existing building is 250mm of SupaSoft. For added performance in an existing building or for a new build use 300mm.
For further information download our Insulating your loft with SupaSoft Insulation factsheet
What is Thermofloc recycled insulation made of?
Thermofloc is a loose fill cellulose insulation made from recycled newspaper combined with a mineral fire retardant. A sustainable and cost effective way to insulate horizontal surfaces such as your loft or floors.
What U-value can be achieved with a THERMOFLOC insulated construction?
The U-value achieved will depend on the thickness of Thermofloc. However a thermal conductivity of 0.039 W/mK ensures a consistent high performance envelope of Thermofloc insulation helping minimise heat loss in the winter and keeping your building comfortably cool in the summer.
Install Thermofloc at a density that provides additional thermal mass to the building envelope. Therefore helping smooth out highs and lows as the building fabric warms and cools.
Please contact us on 01768 485050 for specific U-Value Calculations
Hemp and wood fibre insulation FAQs
Is Hemp insulation itchy?
Thermafleece Natra Hemp insulation is harmless when installed without gloves or protective clothing. Although we recommend to wear a dust mask in enclosed spaces such as lofts. Thermafleece NatraHemp is not irritating to the skin, eyes or respiratory tract.
What is Hemp insulation?
Hemp is a fast-growing, low-impact plant crop that produces fine fibres suitable for insulation. Thermafleece NatraHemp is a medium density insulation rich in home-grown hemp fibres and is a safe, efficient and durable alternative when plant fibre is the preferred choice.
Is Hemp a good insulator?
Hemp is a good insulator. Thermafleece NatraHemp fits securely between rafters, joists and studs providing excellent thermal insulation performance. What’s more, with a density of 25 kg/m3, Thermafleece NatraHemp can provide good acoustic insulation in a variety of systems.
How do I cut Hemp Insulation?
How to cut hemp insulation guide. Cut Thermafleece NatraHemp using a straight edge and a Stanley knife, or simply tear it apart.
For more accurate cutting, tightly compress or clamp the insulation between two pieces of solid 15mm board. Overhang the fleece where you want to cut keeping the two board edges aligned. Saw cut the edge using a sharp, scalloped edged knife and keep the blade firm and square against both board edges throughout. Trim any fine remaining fibres with large scissors or shears.
Is Hemp insulation suitable for vegans?
NatraHemp is hemp insulation suitable for vegans. A medium density insulation rich in home-grown hemp fibres and suitable for vegan use. NatraHemp is a safe, efficient and durable alternative when plant fibre is the preferred choice.
What is Steicoflex insulation made from?
Steicoflex is a wood based, highly versatile and eco-friendly insulation slab. Made from wood fibres, poly-olefin fibre (a high quality binding fibre found in nappies), and ammonium phosphate (for fire protection). It is a high density product with good acoustic properties.
Where can I use Steicoflex insulation?
Use Steicoflex between rafters and joists as a dry wall insulation and as loft insulation. Also use it to insulate timber frame structures, walls and internal partitions.