Flat roof and attic insulation in Dublin

Flat roof and attic insulation is very important. The airtight insulation material installed prevents the exterior air from entering and interior air from escaping. This results in stable comfortable temperatures inside the home regardless of the external conditions.

Basically, as air in the house gets warm, it rises. Without insulation, the warm air will be lost via the roof (and any other non-insulated surface), as cold air enters causing temperatures to drop. Such erratic temperature changes are undesirable and so roof and attic insulation is vital to keep your house warm.

That’s why strategic sections of house are insulated. Walls, floors, crawlspaces, basement, attic or any other spot that can allow air leakage. Of these, the non-insulated flat roof or attic contributes to over 50% heat loss for the entire house.

The benefits of good flat roof or attic insulation

Attic insulation yields tangible result that are beneficial to the residents including:

  • Reduced energy costs
  • Improved comfort levels in the house
  • Reduced demand on heating, ventilation and air conditioning (HVAC) systems increasing their lifespan
  • Sound proofing, enhancing privacy

Attic insulation materials

There are many insulation materials well suited for attic insulation. Despite having different features, one thing they have in common is excellent insulation capacity. The materials are rated in terms of their thermal resistance i.e. R-value. The higher the R value the better an insulator a material is.


We recommend Paratorch insulation boards for flat roof insulating, the boards are fixed to the outside of the roof, meaning little or no disruption to the inside of your home. We guarantee this work for 15 years. 

The most commonly used attic insulation materials are:


Fibreglass Wool

It’s made of about 20-60% recycled content consisting of thin glass fibers. The fibers bound to the millions of glass trap air particles preventing any heat loss. A standard fiberglass insulator has R-value ranging between R-2.9mm to R-3.8mm. Features: water resistance, fire resistance, noise resistance/ sound proof, mold resistance, and environment friendly. It comes in two common forms, rolls and batts. Fiberglass is affordable and a very effective insulator.


Cellulose is made up of 80-100% recycled material and consists of shredded papers and newsprints, paperboard stock or wood. Its R-Value is averagely R-3.5 to R-3.6mm. It is blown into the attic forming a very airtight barrier. It is treated with chemicals to enhance its non-combustibility. It is sensitive to moisture and should be kept dry. Besides, it is environmentally friendly.

Spray Foam

Spray Foam

Different chemicals are mixed to form the foam and sprayed into that attic. It comes in two forms. The cheap open cell that has lower R-value and lacks good water resisting capacity. The spray of choice is closed cell. With a high R-value of R-6.0 mm, it is an excellent insulator. It’s also dense and very strong. The spray is mould resistant. Due to its chemical composition, its environmental friendliness is not assured.

Cotton / Denim

Cotton / Denim

Cotton / Denim Insulation is made of 90-100% recycled material. Its R-value is relatively high, ranging between R-3.4 – 3.7 mm. It is very easy to install and does not require special equipment or protective gear. Also, it is fire resistant as it contains boron, a fire retardant. Moreover, it is resistant to microorganisms.

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