All you need to add is timber.
Pitched roof insulation details.
As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation.
When it comes to pitched roofs however adding a thick layer of insulation to the rafters can result in a depth of roof construction that may not suit every site meaning over rafter insulation sarking only is not a viable option.
Ventilation vapour control and insulation to provide adequate ventilation and to avoid condensation in roof voids pitched roofs that have insulation at ceiling level should be ventilated to the outside air.
Pitched roofs are a common sight in the uk owing to their versatility and typical low maintenance requirements when compared to other forms of roof construction.
Fabrications with 3mm 10mm openings are acceptable.
Ventilation openings should prevent the entry of birds etc.
Insulation is effective within the pitched roof but a strong fabric performance means the design and installation extends beyond the u value and thicknesses of celotex.