As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation.
Pitched roof insulation details.
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.
All you need to add is timber.
To create a warm pitched roof insulation such as kingspan kooltherm k7 pitched roof board should be fitted between and over the rafters.
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.
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.
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 openings should prevent the entry of birds etc.