here ya go guys....

[John Benton]

Spacers, when used should be removed for 4 reasons:-

1. They cause a weakness in the joint as the grout depth is less
2. They cause the grout to dry at a different rate so therefore can leave lighter patches
3. If the spacer is not sat down far enough into the joint they can stand proud of the grout
4. Most important, it costs you money having to replace on every job

 

[Qwerty]

Nothing wrong with using spacers, it's leaving them in and grouting over them that's the issue!!!

Agreed. On large open floors when laying large polished porcelain or real stone (all exact sizes) I have always used spacers and the finish is far superior and time fitting far quicker with spacers. We all know the jobs.....tiny grout joints, mirror finish, mm accurate across 15metres.

I have never left spacers in whether it's walls or floors