About

Various Terms and Conditions apply to our work. Our mission is to provide the best quality work and a reasonable price.

Before accepting any quote from InTech Clean, or any other company, you should be aware of the following various Terms and Conditions:

General Terms
All work in excess of single storey require scaffolding. Any work requiring Acid or Media Blasting requires exclusive external access. An additional call out fee may be charged if our work is disrupted.

Quotations: should area sizes supplied by the customer and therefore quoted by InTech Clean Pty Ltd differ from actual requested work size area, a re-quote may be necessary. All re-quotes will be conducted prior to commencement of any work. All phone and online quotes are subject to a site measure.

On booking say please ensure:
. There is no washing on the line
. All pets/animals are safely locked away and sheltered from any overspray
. Pot plants and furnishings are moved out of the way
. Windows are closed and locked
. Old towels are placed behind any door or window that may leak
. Light fittings, light switches, sensors, power points and the like are covered
. Anything you don't want acid on is covered. e.g. Decking, Plants
 

Conditions:

1. Stains and marks including but not limited to cement, paint, rust, calcium, vanadium stains, efflorescence, tyre, oil and metallic stains may not be fully removed.
2. Some work areas may have safety issues due to height, slope, inaccessibility etc. InTech Clean Pty Ltd employees are instructed not to undertake any activity which they consider puts their or others safety at risk.
3. InTech Clean PTY LTD and staff will not be liable or responsible for water or chemical related damage to any fixtures or fittings.
4. InTech Clean PTY LTD and staff will not be liable or responsible for water or chemical related damage to brick or mortar works.
5. InTech Clean PTY LTD and staff will not be liable or responsible for water or chemical related damage to electrical components, electrical fixtures or electrical fittings.
6. Upon acceptance of any quotation the customer acknowledges that the terms and conditions contained herein form the entire basis of the agreement between the customer and InTech Clean PTY LTD . No other terms or conditions or representations shall prevail or form part of this or any agreement between the said parties.

Brick Clean/Acid Wash

Note: Acid Washing of bricks is recommended within 24-36 Hours of laying.

1. Efflorescence.
Efflorescence is a powdery deposit of salts which forms on the surface of bricks and mortar. It is usually white but efflorescence can be yellow, green or brown. A temporary efflorescence is particularly common on new brickwork as soluble salts are transported to the surface of the brickwork by water. The picture below shows efflorescence on brickwork.

Efflorescence can occur from a variety of sources. New bricks contain minimal, if any, soluble salts, but mortar and concrete have relatively high soluble salt contents. Ground waters that are naturally salt-bearing can be drawn into base brickwork. A faulty or bridged damp-proof course will allow the salts to migrate up the wall. Render that has been applied over a damp-proof course can also allow salt to migrate up the face of the brickwork. Water allowed to enter uncovered cavity walls during construction is also likely to cause efflorescence, so brickwork must be protected from water entry during construction. The amount of efflorescence that occurs is related to the amount of water in the bricks, and their drying time. The more water in the bricks, and the longer it is there, the more chance salts will have to dissolve and be brought to the surface as the bricks dry out. Efflorescence on new brickwork may be unsightly, but it will not cause damage. Persistent efflorescence should be taken as a warning that water is entering the wall through faulty copings, damp-proof courses or pipes. If allowed to continue unchecked, the salts carried to the face of the wall may eventually attack the bricks and cause deterioration.

2. Insoluble White Deposits (Scum).
Insoluble white deposits appear almost as a milky film on the brickwork. The hard white deposits are insoluble in water and are invisible when wet. Do not confuse these deposits with efflorescence, which is soluble in water. An extreme example of insoluble white deposits is given below.

Most commonly this staining can arise from the products of the setting reaction of Portland cement, which are leached out of concrete elements such as sills, lintels, copings, cement render or from insufficiently-dense mortar. They combine with carbon dioxide from the atmosphere to form white deposits that are insoluble in water but soluble in dilute hydrochloric acid. The combination of clay from the mortar with calcium and silica residues from the cement forms calcium silicate, which could also produce the insoluble white scum. Calcium silicate is highly insoluble in most acids and is white in colour. When wet these calcium deposits are invisible. Kaolin, a clay mineral present in most bricklaying sands, can also form a hard deposit. It is insoluble in most acids except hydrofluoric acid (which is a restricted product).

However, the main cause of these insoluble white deposits is bad cleaning practice; allowing mortar made with sand containing too much clay to remain too long on the surface of the bricks and then removing it with too much acid and/or too little water. When not enough water is used before and after the acid wash, the products of the reaction between the acid and the mortar can be absorbed into the face of the bricks instead of being washed off the wall.

3. Paint.
Whereas all efforts to remove any paint spills will be taken, the results will be unknown until attempted.  

4. Other stains.
Other general marks and stains are not in scope of our standard brick cleaning, but we are happy to quote separate as required.

5. Chiseling.
Included in the scope of our Brick Cleaning is  general scraping of mess from bricks.  If the brickies have made a big mess and we need to chisel and hammer mess away, this will be extra.

6. Access.
We will require full and safe access to the area to be cleaned.  If other trades are working in this area, or below, consideration needs to be given to the hazards of High Pressure Water and Acid Cleaning. Our equipment, generally, is trailer mounted, and access for a trailer but be allowed. If no trailer access is available, please advise prior to portable equipment can be arranged.

7. Water.
InTech Clean Pty Ltd will require access to water.  Where required, we can bring water in to use, and this will give us about an hour of brick cleaning.  But this supply will need to be replenished nearby.

7. Payment.
InTech Clean Pty Ltd will full payment at cpompletion of the work, unless prior credit arragements have been established.

We welcome the opportunity to visit you and talk to you or demonstrate this suburb technology. Feel free to contact our friendly team on 6336 9544 with any questions you may have.

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