Tel: 021 451 8370 Freephone: 1800 636363

Loft and Pitched Roof Insulation

The options available to you for insulating your roof will depend on the type of roof you have. These options include pitched and flat roof insulations.

Loft and pitched roof insulation


Pitched Roof Insulation

There are two options available for pitched roof insulation which include warm or cold loft insulation.

Cold Loft insulation for Pitched Roofs

The simplest and cheapest loft-insulation solution is the classic 'cold loft' option. This is often referred to as attic insulation.

Loft insulation involves insulating between and over the wooden joists immediately above the ceiling of your home's top floor. Building regulations stipulate that to meet today's standards your attic should have a minimum of 12 inches (300mm) of insulation.

It is called 'cold loft' as it will result in your loft feeling rather cold in the winter, as the roof itself might not be insulated. But your living space underneath will be insulated.

Warm loft Insulation for Pitched Roofs

If you can't install cold loft insulation, perhaps because you're using your loft as a living space, you will need to consider warm loft insulation.

For a warm roof, you will need to install insulation directly under the roof in the plane of the pitch. This will also result in your roof space not becoming excessively hot in summer or cold in winter, and will reduce heat loss.

One important point to remember with a warm-roof solution is the need for ventilation immediately below the roof tiles. This is to prevent any condensation build up or water getting in through or around the tiles, otherwise the roof structure may begin to rot.

Flat Roof Insulation

There are three options available for flat roof insulation which include warm deck, cold deck and inverted roof insulation.

Warm Deck 

Warm deck or warm roof refers to a situation where the 'deck' of the roof, which is usually made of wood, is below the insulation. Great retrofit option on existing roofs.

Cold Deck

Cold deck or cold roof is where the insulation is below the roof deck (and the associated joists). Typically a gap will have to be left for ventilation; because this is a 'cold' area, condensation may form which can lead to rot. In both these cases, the weather membrane, typically formed of roofing felt and bitumen, will be the topmost layer, protecting against rain.

Roof Insulation Cork

Get In Touch

For more information on the various forms of pitched and flat roof insulation, contact our team today in our Cork office on 021 451 8370.


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Tel: 021 451 8370
Freephone: 1800 636363

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