[Cob] RE: cob rumford fireplace

[Bernhard Masterson]

Hello Susan,
    Couple of thoughts on cob Rumfords for you.  There is no reason that you 
could not build an outdoor Rumford completely out of cob.  The downside will 
be that the cob floor, fireback and covings will wear quickly due to the 
thermal cycling and the abrasion of the firewood.  If an anual replastering 
was made you would be in fine shape.  To reduce such maintenance most 
builders due build the floor, fireback, and covings out of more durable 
firebrick.  For best pricing purchase your firebrick from a masonry supply 
yard.  The throat can be built with a precast cob adobe that will form the 
lintel/mantle.  Just use Rumford's ratios available at www.rumford.com and 
you should be in fine shape.

- Bernhard
_________________________________bernhard_masterson at hotmail.com      
Portland, Oregon


Message: 4
Date: Fri, 18 Nov 2005 19:44:01 -0800
From: "susan macias" <smacias at worldnet.att.net>
Subject: [Cob] cob rumford fireplace
To: <coblist at deatech.com>
Message-ID: <00a401c5ecbb$7c4f79f0$4a29480c at manlymachine>
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I'm looking for specific info about making a Rumford fireplace from cob.  
There
are plenty of plans for traditional Rumfords available, but I'm looking for
cob-specific information.  What non-cob parts or material need to be 
included?

Thanks in advance to anyone who can help.
Susan