Party Wall Roll is a glass wool roll designed for use within masonry party or separating walls as described within Approved Document L1A (England & Wales) and Technical Handbook Section 6 (Scotland) respectively. When installed in a masonry party or separating wall in conjunction with effective edge sealing will negate the effect of thermal bypass associated with such walls whilst not significantly affecting their acoustic performance. Party Wall Roll may be used as a component in a number of Robust Detail solutions or it may be used in party wall systems which require on-site pre-completion acoustic testing.