brick laying in cold weather

Discussion in 'Builders' Talk' started by woodburner, Nov 18, 2005.

  1. woodburner

    woodburner New Member

    Hello,

    I am assisting a bricklayer in rebuilding a chimney and am wondering weather we should attempt it at all in this cold spell.

    We are covering the work with an electric blanket at night, mortar fleece, tarps, etc. but I am concerned about the affect the cold will have on the mortar mix.

    Any advice, positive or negative, would be gratefully received.

    Woodburner
  2. jonob

    jonob Member

    you can use a additive called winta- mix
  3. PowerTool

    PowerTool New Member

    Otherwise,general advice is to only lay bricks with temperature at +4 c and rising.
  4. T

    T New Member

    as long as u cover it up, 2+ on our sites, but as long as its not 0 shud be ok
  5. blomster

    blomster New Member

    Give the bricks a hot water bottle each. That should be fine with their electric blanket.
  6. Lee

    Lee New Member

    Could someone please let me know what the 'down side' of laying bricks in the cold is plase? Apart from the obvious answer of 'your hands get cold' from some usual smart *** lol

    Regards

    Lee
  7. woodburner

    woodburner New Member

    Hi Lee,

    Got this off the web...

    Brickwork which is damaged by frost is usually attributed to unsuitable mortar, wet bricks or bricklaying in freezing temperatures, it is unwise to lay bricks when the temperature is at or below 3oC. Make sure when laying bricks that the temperature is at least 4oC and rising when laid and afterwards keep the work covered for 48 hours, or longer if it is snowing, to keep it above freezing.

    Water in the mortar expands on freezing disrupting the bond and causes cracks to appear in the joints.
    Likewise if you use wet bricks the frost can cause the face of the bricks and mortar to flake. The end result is a loss of strength in the wall.

    Cement sets more slowly in cold weather (roughly half as fast for every 10oC fall). If it rains when the
    mortar hasn’t set, the rain can wash out the mortar from the joints and discolour the rest of the brickwork.

    All of these eventualities can be overcome by a bit of forethought in using a mortar mix suitable for cold
    weather and by keeping all materials, working areas and completed work covered up.
  8. Hoskie

    Hoskie New Member

    Woodburner you answered your own question! Well done mate not often you see someone using their nodle to look something up!

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