Does spray foam insulation cause condensation problems?

No. When used to upgrade the insulation of a roof, spray foam is sprayed across the whole roof and down into the eaves to create a ‘warm-roof’. The system has been independently tested and found to more than satisfy BS:5250 2002 in respect of control of condensation in buildings. Where the foam insulation is used primarily for roof stabilisation and applied to a thinner nominal depth, ventilation at eaves level is maintained to ensure minimal risk of condensation.