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.
Is your house cracking up? Made it through winter and now you want to get the house airtight and weatherproof? You may need crack injection and/ or brick stitching.
Cracking at mitre corners is very common in masonry. Fix it with brick stitching.
First, the mortar material in between the bricks should be removed. This will provide longer serving results for the repair. Next, the joints are lined with the steel reinforcement. These elements are either galvanised or stainless steel.
The stitches are installed as regularly as required.
With the brick stitches in, next is the final tamp point.
Replacement mortar is reinstated, making the repair complete.
Raised Ribbon Pointing replacing older Brick Tuck Pointing on Ballarat Heritage Facade
When comparing traditional ribbon pointing as opposed to brick tuckpointing there are several differentiating factors.
As you can see from the above photo, the heavy oxide mix used on brick tuckpointing (top courses) can actually cause issues if not installed correctly. Mortar, often used in only one colour, is used to smear over the original bedding mortar which is visable where the red coloured mortar has fallen off. This is due to the smear coat method only being several millimetres thick or possibly too brittle to start with. In the instance above, this is definitely the case.
Another issue is that due to oxides’ cementitious effect on the mortar matrix, the mix can often be quite destructive to the 80-100 year old brick. Mortar, as also evident above, is smeared over the brick arris; partially covering the face. In tension, this can snap corners off and even break bricks clean in half–especially old, soft brick.
The biggest comparison, besides appearance, is that the traditional ribbon technique will protect the brick, whilst at the same time, provide depth and definition to the masonry facade. Standard tuckpoint can last quite a while but as opposed to the deeper ribbon pointing, the facade will age better and can last a lot longer.
Brick Tuckpointing, before and after lime putty ribbon
Faraday Avenue, Rose Bay is one of Sydney’s best looking streets. Closely situated to the city, the eastern suburbs has so many beautiful stone features. With a combination of stone from Balmain, Drummoyne and Gosford (Mount White), the stone blends well with it’s neutral tones.
The front fence as featured above took two months to complete. This had occured after six months after the rear fence and pool surrounds, pictured below, were completed.
The owners had such a beautiful house that magazines would regularly utilise their premises. The wall pictured below was used in a Freedom Furniture advert at that time.
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.
Whilst being involved with a major Melbourne Heritage Building Company, G.H. Veitch Stonemasons assisted with the facade restoration carried out in 2012 on the fantastic French-provinical-styled GPO in Melbourne CBD.
Indent -Tympanum Cap & Ledge
Let us carve your new external facade architectural stone features in Sandstone, Bluestone or Limestone