I have been asked to rectify some fire foam work that was carried out by another contractor. I have always been taught that any aperture over 50mm that foam should not be used and instead the use of a mineral fibre(batts) used in conjunction with intumescent mastic and an ablative paint.
Is this information outdated ? as i know that various foam products are now available. also what is the life span of the older foam products (i know this is a hard question to answer not knowing the make or spec)
Could you give some information on any products that would be a suitable product please
thanks in advance