grand wizard said:kirk is right they used to teach you at bg to dot out they used a black pad you pushed into the dot and line them thru
could someone give me a guide price for 250 mtr of dot & dab please I know theres a differance in the country variants at the moment it purley for guidance
Old thread mate , welcome new member when I read the op I thought I'd found someone madder than me buy you'll do if you can tell me about foam dabbingThere's another version of the dots I've come across; put screws straight into the blockwork, no plugs.
You can move them in or out until they're right, and/or tie the chalk line to it to set the level of the rest. Came across this when some cowboys fixed fireline to a fireplace wall with expanded foam.
I confess - I also used this once, to guarantee the air gap that Andy mentioned, behind vermiculite boards inside a fireplace.
Did a house in wales Addy DND BC came and I asked how many fire fixings ( got my own method ) , he looked at me puzzled , unsure of what I was talking about and replied " oh yeah, sounds OK to me " , only 5 years ago , another world in them valley'sAh, no I meant I used the screw trick not f'ckn foam - in my case I used 1300C high temp mastic.
But yes, there are some foamers out there, mainly bodging builders/board subbies. Couple of big screws or nails right thru' to stop it pushing the board off until its set, then get some skim over it. Saw a Building Control guy actually requesting it on one site "so that smoke and fire does not get thru" unquote.
When I rocked up on job bloke had a tiling trowel and wanted to to put dot on solid like I was tiling .Tut tut no continuous bead around tops and bottoms and round boxes... thought you would know better