# Seal External Facing Masonry and Blockwork Walls ### Issue Image: ![[Pasted image 20250113174450.png]] ## Issue Description: - Masonry and Blockwork are permeable to water. - As this builds up it can result in growth of moss and lichen. - To reduce water building up in these elements they shall be sealed with a clear sealer. - This is especially important on the south facing walls and walls without protection from eaves. ## Actions to Prevent this Issue: - [ ] Architect to detail masonry sealer to external walls. - [ ] Project Manager shall check that details of this are included in the Owner's Manuals. ## Source