From:
Nick Durnan <durnan@zzzzzzzzzzzzzzz>
Date:
Sun, 19 Dec 2004 15:48:19 +0000
Subject:
mortar ethics
On 18 Dec 2004, at 14:32, Marcus wrote:
Quoted text begins.1. How much real damage can this straight portland mix do to an old
brittle
limestone structure, what kind of damage, and when will it become
apparant?
2. Do you have any advice as to how to influence a generally good boss
End of quote.
Portland cement can be very damaging to old limestone. Invariably on
historic stonework the proof can be clearly seen where stone is
decaying around and behind the previous 19th and 20th century hard and
dense cement mortar pointing and repairs.
One way to influence the boss would be to show him some historic
buildings where lime was used for the original construction and see how
well it has lasted. Also on a purely practical level it is much easier
to carry out repairs to a brick or stone building where lime more has
been used for the construction as stone and bricks can be removed
without damaging adjacent fabric.
Nick
Nicholas Durnan
Thrift House
Bow Street
Langport
Somerset TA10 9PS
Tel 01458 259094
http://www.nickdurnan.co.uk
- Follow-ups
- message 00592: mortar ethics - George Graham (21 Dec 2004)
- message 00589: mortar ethics - Clive Murray-White (20 Dec 2004)
- References
- message 00578: Pro-bono refininshing project - Tim Bunton (17 Dec 2004)
- message 00579: Pro-bono refininshing project - John Twilley (17 Dec 2004)
- message 00580: mortar ethics - Marcus (18 Dec 2004)
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