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What are brick lines made of?

Chris Chris
12th August 2021

What are brick lines made of?
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Brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line Brick lines were traditionally made from twine or cotton string, but synthetic fibres such as nylon and polyethylene have become more popular.

Cotton
Cotton Brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line Cotton thread, when twisted or braided into string, is strong and flexible though may snap or stretch if put under too much strain or if it is weakened by moisture, dryness or mildew. Repeatedly getting cotton wet and then drying it can lead to it weakening and makes it much more likely to snap.
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What is cotton?

Cotton is a soft, white, fluffy natural fibre that is widely cultivated around the world and woven into fabrics and threads.

Polyethylene
Polyethylene Brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line Modern brick lines tend to use a synthetic material such as polyethylene. Polyethylene plastics are much more resilient to moisture and heat; they are waterproof, rot-proof and stronger than cotton lines of the same thickness.
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What is polyethylene?

Polyethylene (also called polythene) is a thermoplastic polymer and the world’s most commonly used plastic. It is widely used in the manufacture of a huge number of everyday items such as plastic bags, bottles, ropes, films, packaging and tubing.

Nylon
Nylon brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line Nylon is another synthetic material used to manufacture brick lines. Nylon cord is very strong and flexible, it will not easily stretch and is resistant to mildew, dryness and heat. It is also rot-proof and waterproof.
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What is nylon?

Nylon is a silky thermoplastic polymer commonly found in lots of fabrics and used in many manufacturing processes. It is an extremely versatile material and is used to make everything from tights to toothbrushes and from packaging to parachutes.

Different brick line weaves
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Twisted line

Twisted lines are a type of yarn (woven fibres) that consist of interlocking threads that have been spun together to form a string or rope, increasing its strength.
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Braided line

Braided lines are where the individual threads have been woven together in an interlocking braided pattern to increase their strength.

Which should you choose?
Brick lines, brickys line, builder's string, mason's line, marking out tool, reference line, bricklaying, brick pins, brick blocks, line blocks wonkee donkee tools DIY guide how to use a brick line Synthetic fibre lines such as the nylon or polyethylene varieties are generally considered to be better as they are much stronger than their cotton counterparts. They also have the advantages of being waterproof, rot-proof and resistant to stretching.
Brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line A braided line is considered better than a twisted line (of the same thickness) as its interwoven threads give it greater strength and a higher strain capacity.
Brick line, mason's line, brick twine, bricklayer's tools, marking out tools, string line, fluorescent, level, plumb, wall, bricklaying, wonkee donkee tools DIY guide, how to use a brick line A braided line with a tight braid will be stronger than a line with a loose braid.

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