mortar for breezeblock All manner of questions and solutions to problems and issues surrounding the subject of brickwork, blockwork and stonework

[crooner]

i am filling in a doorway and need to know the mortar mix for lightweight thermalite blocks,
back of the cement pack i have say's mortar general use 1 to 5
mortar strong mix, 1 to 3, but i am laying large lightweight blocks
what mix should i use.

[stoneyboy]

crooner,
Assuming you are using a cement with additives (eg mastercrete) go for the 1:5 or even 1:6.
end

[crooner]

thanks stoneyboy,
wickes stock's Mastercrete Cement so i'll use that