Fibreglass Roof Insulation U Value

U values are based on the first layer of insulation laid between the joists and the remaining thickness installed as a second.

Fibreglass roof insulation u value. 0 16 windows and doors 1 80w m k. U value insulation beech road western industrial estate dublin 12 ireland. The quick free and easy way to find out the insulation thickness and the u value you need for your building project. U value has an inverse relationship to r value.

The table below shows the u values achieved using moy plus insulation laid in the roof void. U value rafter insulation solutions 100 kooltherm. Building regulations determine the maximum allowed u value. For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Your home doesn t necessarily need the highest r value insulation. The r value your insulation needs depends on your local climate. Gallen insulation supply the full range of isover fibreglass insulation products.

A minimal thickness of 160mm is recommended in order to insulate a pitched roof. Available thicknesses of fibreglass insulation. Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. Once you find your home s zone on this map you can use the below insulation r value chart to determine.

The map above shows each region of the u s. Insulation can also be ranked using a u value which calculates a materials insulating effectiveness in watts a lower u value generally indicates that the material is a more effective insulator. Thicknesses of fibreglass insulation start from 60mm and increase by 20 mm 80 120 140 160 180. Notes to the table above.

Please click on the headings below for full information on fibreglass insulation. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. Thermal insulation of building materials is closely linked with the need for heating energy. U values are useful for calculating a building elements overall insulating effectiveness rather than just measuring the effectiveness of a specific material.

You should really aim to cut in half these u values and achieve higher level energy savings. For example a wall with 3 fiberglass batting r value of 10 8. The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7.