Browse Forums General Discussion Re: Question about EFFLORESCENCE in bricks and sealing optio 4Aug 07, 2014 9:01 am Hi Stewie, Thanks for your reply. Here are a couple of photos of the offending spots - there are only two that we can see as the efflorescence is occurring on the inside of the brickwork. I'm not sure if our bricks are hard or soft....I could try throwing one at someone and ask them lol!! But seriously, we have a mixed bag of commons, all different colours. The efflorescence is happening up to about a metre high inside our fireplace and also on the inside garage wall....probably not a huge worry but I'm wanting to avoid possible development on the outside face later on and bubbling (not a Todd Carney reference) or flaking of our paintwork. http://i1247.photobucket.com/albums/gg634/lynny-jane/bricksgarage.jpg http://i1247.photobucket.com/albums/gg634/lynny-jane/bricksfirplace.jpg Owner Building on 1800sqm Sanity Intact so far Locked up March 2012 Re: Question about EFFLORESCENCE in bricks and sealing optio 5Aug 07, 2014 11:52 am It sounds like you may have a defective DPC ( damp proof course ) which is usually installed just above ground level. Yours may be installed too low or it may have been bridged/compromised. Moisture being sucked up from the ground is either forcing salts out of the bricks or dragging salts from the ground with it which appears on the face of the brickwork. Efflorescence usually occurs on the lower parts of walls as a result. Old terrace houses and semis like those in Paddington see a lot of this where the old slate DPCs are either broken or missing. Brick repairers who specialise in this sort of work may be a good source of info. Someone with a moisture meter will be able to tell you whether the DPC is doing its job or not. Stewie Re: Question about EFFLORESCENCE in bricks and sealing optio 7Aug 11, 2014 9:42 pm Hi Lynny-Jane Just curious is the outside wall FaceBrick on the top half and rendered on the bottom half? If so it should be the other way around. Alternatively, Paint/Waterproof the whole external wall. As stewie D said the moisture can only come from the Bottom or from the Top of the wall Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Question about EFFLORESCENCE in bricks and sealing optio 8Aug 12, 2014 8:45 am Quote: How much effect from poor draiange can have an effect like this? Some or a lot but that depends mostly on whether the DPC is a) in the right place ( or the right level ) or b) whether it is intact. You can have a DPC on a house that is in a flood zone with soaking ground and if it has been installed properly it will stop rising damp etc. Stewie Hi, planning on using the attached stone pieces in my bathroom. I want to remove stains and gloss seal. Can I get some advice on best way to remove stains and best… 0 6700 Ha all, I am now about half way (maybe a bit more) through my build with Carlisle Homes - double-storey knockdown/rebuild project. So I am now doing my due diligence and… 0 3713 |