Hello! How do I best fill deep holes in lecablock? Murbruk B?
I found something called "lagningsbruk", it was recommended to only use in a layer of 30 mm. It's probably not illegal to use it deeper than that, but the holes are quite wide and up to 70 mm.
I found something called "lagningsbruk", it was recommended to only use in a layer of 30 mm. It's probably not illegal to use it deeper than that, but the holes are quite wide and up to 70 mm.
Leca is usually mortared with B mortar, so it works well.
If there are large holes, it's practical to have some shards of lecablocks on hand that you can stick into the mortar so it doesn't become an overly large lump. This helps prevent the patch from running off and also prevents shrinkage cracks.
Since it's important to really fill the damage from the bottom, you should get a joint trowel before you start. It's a masonry trowel that's as wide as an ice cream stick, roughly. A narrow putty knife with a handle is also helpful.
Wet the lecablocks before you start so they don't absorb the water from the mortar.
If there are large holes, it's practical to have some shards of lecablocks on hand that you can stick into the mortar so it doesn't become an overly large lump. This helps prevent the patch from running off and also prevents shrinkage cracks.
Since it's important to really fill the damage from the bottom, you should get a joint trowel before you start. It's a masonry trowel that's as wide as an ice cream stick, roughly. A narrow putty knife with a handle is also helpful.
Wet the lecablocks before you start so they don't absorb the water from the mortar.