Repointing is a term used for resealing the ridge capping mortar when the existing mortar is cracking out allowing water penetration. When resealing the ridge cap mortar the following must comply to allow for repointing to occur.
- The existing mortar is solid (not sandy) ensuring a solid base for the new pointing (sealant coat) to fasten to.
- JSJ Roofing stress that the existing caps require correct preparation before repointing (resealing) can take place. This is done by removing the old mortar from the cap edges also wire brushing the caps, old mortar and tiles ensuring a clean surface for flexible pointing to fasten to.