With salts permeating through this subfloor structure located in Brighton, VIC, it was apparent that there was something very wrong.
Efflorescence, aka salt attack is a calcium chloride/ zinc chloride build up caused through moisture in the subfloor or rising damp from subfoundation soil.
When viewed from behind the wall, the salt attack was much worse; formations of hygroscopic gel and rust was evident.
Through constant hygroscopic moisture (airborne) contained in the subfloor area, and the lack of ventilation, the damage to the bricks is inevitable.
Ideally, repairs should occur at a time prior to the state of deterioration as indicated.
Contact melbournebrickrepair.com for further information on subfloor conditions.
With 12v low voltage conduit poking through the brick piers, under pathways and driveways, each pier is made from solid brick and was rendered without any trim– the old fashioned way of squaring your rendered corners.
The 15mm thick lime render is finished with a special mix utilising a smaller particle size. This enables the sharp corners to offset a smooth rendered finish.
As a finished shot, the piers were painted, in-filled with timber slats and light fixtures placed on top.
Here some of our other fences we have completed over the years;
Remember, mortar has a 28 day curing time.
Although it is still curing, the mortar repair and re-pointing are getting gradually lighter.
After we knock out the joints, the replacement material will be placed and shaped to create what is known as ribbon pointing. The idea of ribbon pointing is to effectively ‘flatten’ the wall.
the balance that this will create will be surprising and should come up really well. More to come…
Australia is one of the driest places on earth. If your house slab is built on highly reactive clay soil types, the expansion and contraction of the clay may cause differential settlement within the sub base region under your house slab and also contribute to large crack formations in your brick masonry walls.
If this is the case then underpinning may not be the only remedy needed. We also utilise a technique known as slurry diaphragm walling to prevent water loss through lateral hydrodisplacement. In other words, a trench is made, and filled using a suspension mixture of bentonite, clay and possibly cement if required.
The soil bentonite slurry wall inhibits water transfer and protects the sub base area underneath your house. This inhibits differential settlement and subsequent cracking there under.
If you have type 2 clayey soil under your house then the diaphragm slurry wall method maybe your best bet. Give us a call on 0499330772 or send us through an email at firstname.lastname@example.org for further information.
The above limestone is from WA. The important thing to remember when working with soft types of limestone such as this is to reinforce any overhead arch to provide extra support. The neutral colours of the stone facade and fence balance well with strong blacks or dark greys.