I have a century-old home – what product would you recommend?

Natural fibre insulations are excellent for use in traditional and period properties for a number of reasons.
Older properties will not necessarily measure to standard dimensions and it is common to find a varying range of joist or rafter widths within the same property.

Black Mountain products are incredibly versatile and easy to cut and shape as required. For larger projects, bespoke products are an alternative solution to an unconventional building.

Elevated moisture levels are a common occurrence in traditional buildings. Black Mountain natural insulations absorb excess internal humidity to protect against damp and mould without damaging the often delicate fabrics of the building.

Can I use black mountain insulations to insulate my floor?

If the floor is timber then yes – if there is a crawl space or cellar below the floor ensure that wire mesh, breathable membrane or plastic netting is put in place to hold the insulation in place.

To install from above simply remove floor boards or panels and use a breathable membrane or netting to create a trough for the insulation.

Should I leave a ventilation gap when insulating a loft space?

When insulating loft space it is important to assess where the insulation is required.

For attic conversions, insulating the rafters may require a semi-rigid insulation to prevent slumping. However, sheep wool insulation can be stapled to the rafters to maintain its original position.

It is important to be aware when insulating a warm loft, the type of roofing felt present; ‘breathable membrane’ and older bitumen based ‘non-breathable membrane’. The key difference between a breathable membrane and the older bitumen membrane is the 50mm ventilation gap required for non-breathable membranes.

How would you install insulation into an unused loft?

In order to avoid energy escaping into unused loft space, it is recommended that insulation is applied between the joists on the floor of the loft. The first layer of insulation should fit snugly between the joists to avoid gaps from occurring.

Additional layers should be fitted at 90-degree angles to the previous layer to avoid thermal bridging through the joists.

Rolls are particularly easy to install between joists and can save a significant amount of time to apply.

Are natural insulations suitable for cavity walls?

It is not recommended to install natural insulation into brick and block cavity due to the possibility of running water from driven rain. For this situation, we would recommend an inert material.

Can I use natural insulations on the inside of a solid stone wall?

A solid stone or brick wall may be susceptible to damp or driven rain. It is recommended that a stud wall is constructed with a ventilation gap between the solid wall and the stud partition.

Should I remove any insulation already present?

Black Mountain Insulation can be placed over any existing material unless it is badly damaged or covered in debris.

Some man-made insulation materials can be time consuming and unpleasant to remove and we would, therefore, advise against doing so unless it is necessary.

What thickness should I use to insulate?

Please refer to our individual product data sheets available on our website.