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Cob: i explain about fondations.olivier Tallendier oliviertallendier at hotmail.com
Fri Aug 4 04:20:48 PDT 2000
ok but i am not talking to do not build fondation at all, but reduce the masonnery part to the minimum. and in my mail i am proposing differents methods like i said : >if the foundation are made to protect the walls from humidity, > why not clean the ground, put a mix of stones and lime on the ground > ( like a drain ) > and directly build the wall on it ? > after to protect the wall from water why not put stones on the foot of the > wall and dig a kind of drain all around the house ? i have seen some houses using those thecnics. olivier ----Original Message Follows---- From: "Shannon C. Dealy" <dealy at deatech.com> Reply-To: "Shannon C. Dealy" <dealy at deatech.com> To: olivier Tallendier <oliviertallendier at hotmail.com> CC: coblist at deatech.com Subject: Re: Cob: foundation ? why ? Date: Wed, 2 Aug 2000 12:29:37 -0700 (PDT) On Wed, 2 Aug 2000, olivier Tallendier wrote: > does cob house need really foundation ? > > I have seen some house today directly build on the ground. > ( i'm still in india ) > > if the foundation are made to protect the walls from humidity, > why not clean the ground, put a mix of stones and lime on the ground > ( like a drain ) > and directly build the wall on it ? > after to protect the wall from water why not put stones on the foot of the > wall and dig a kind of drain all around the house ? All of the reasons I can think of (there may be some I haven't thought of) to have a foundation under cob are as follows: 1 - Prevent frost heave from shifting the building and damaging the walls. 2 - Get the wall off the ground so that water from the ground will not seep into the wall. 3 - Get the wall high enough off the ground so that rain splash will not errode the wall. What I am referring to here is raindrops hitting the ground and splattering onto the wall. In a couple of buildings I have looked at, errosion from this is a significant problem, where wind driven rain which directly impacts the walls has little or no effect. 4 - Create a more stable base for the wall if the ground is not stable enough to directly support it. 5 - To appease local building authorities so they will give you a permit. If these items do not apply to your application or are otherwise dealt with, I see no reason why you couldn't build it directly on the ground. Item three above might possibly be dealt with by embedding large flat rocks in the outside of the bottom of the wall, or just plastering the outside of the base of the wall on a regular basis. Shannon C. Dealy | DeaTech Research Inc. dealy at deatech.com | - Custom Software Development - | Embedded Systems, Real-time, Device Drivers Phone: (800) 467-5820 | Networking, Scientific & Engineering Applications or: (541) 451-5177 | www.deatech.com ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
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