[GSBN] Straw on edge with stick (stud) frame

Jim Carfrae jim.carfrae at plymouth.ac.uk
Tue Jul 5 15:45:13 UTC 2016


Thanks Bruce

I’m adding an extra layer of insulation to keep up with current standards like PassivHaus (I don’t build PassivHaus, but clients like to hear that you’re using similar levels of insulation….)

Unless anyone else wants to chip in, I’ll reference Jacob as the originator.

Jacob, If I continue using a version of this method would you like to be credited in the documentation for planning approval etc?

Jim

From: Gsbn <gsbn-bounces at sustainablesources.com> on behalf of Bruce EBNet <bruce at ecobuildnetwork.org>
Reply-To: Global Straw Building Network <gsbn at sustainablesources.com>
Date: Tuesday, 5 July 2016 at 16:10
To: Global Straw GSBN <gsbn at sustainablesources.com>
Subject: Re: [GSBN] Straw on edge with stick (stud) frame


Jim —

I’ll chime in here just to say that I first heard of the system from Jacob, so as far as I know he deserves credit.  (Thanks, Jacob!).  You can add other insulation fairly easily, but generally don’t need to, other than to plug the thermal bridges created by the wood studs where there is no straw.

Bruce


On Jul 5, 2016, at 7:11 AM, Jim Carfrae <jim.carfrae at plymouth.ac.uk<mailto:jim.carfrae at plymouth.ac.uk>> wrote:

Hi Dan

My interest was mainly to do with combining the structural simplicity of a stick frame with the potential for significant extra insulation, as in the StrawCell example.

Does your system involve much additional insulation?

In the UK I have been using a 4 by 2 frame with wool as the insulation between the studs. This combines with the straw to reduce the U value from a nominal 0.16 W/m2K for a rendered straw wall down to 0.11 W/m2K for the hybrid wall.

Jim

From: Gsbn <gsbn-bounces at sustainablesources.com<mailto:gsbn-bounces at sustainablesources.com>> on behalf of Dan Smith <dan at dsaarch.com<mailto:dan at dsaarch.com>>
Reply-To: Global Straw Building Network <gsbn at sustainablesources.com<mailto:gsbn at sustainablesources.com>>
Date: Tuesday, 5 July 2016 at 14:48
To: Global Straw Building Network <gsbn at sustainablesources.com<mailto:gsbn at sustainablesources.com>>
Subject: Re: [GSBN] Straw on edge with stick (stud) frame

Hi Jim,

We’ve been working with a similar system of bales "on end" between 2x studs at 2’ o.c., with ply/fiber board on the exterior, and have a large addition to an adobe house planned to use it soon, working with Bruce King as engineer.  I’d be happy to chat as well and send details.

Dan Smith


d s a architects

1107 Virginia Street | Berkeley | CA 94702
ph. 510.526.1935 | www.dsaarch.com<http://www.dsaarch.com/>



On Jul 5, 2016, at 6:35 AM, Jim Carfrae <jim.carfrae at plymouth.ac.uk<mailto:jim.carfrae at plymouth.ac.uk>> wrote:

Hi Jacob

Thanks for the response.

I have been experimenting with a version of this technique myself, and I principally wanted to find out if:
1)    I was using someone else’s ‘protected’ design.
2)    It might feature in an upcoming academic paper, and I wanted to know who to reference as the originator.

The post that I saw had a photo of a demonstration wall section and a couple of SketchUp drawings – Was that you?

Cheers,

Jim


From: Gsbn <gsbn-bounces at sustainablesources.com<mailto:gsbn-bounces at sustainablesources.com>> on behalf of Jacob Racusin <buildnatural at googlemail.com<mailto:buildnatural at googlemail.com>>
Reply-To: Global Straw Building Network <gsbn at sustainablesources.com<mailto:gsbn at sustainablesources.com>>
Date: Tuesday, 5 July 2016 at 13:39
To: Global Straw Building Network <gsbn at sustainablesources.com<mailto:gsbn at sustainablesources.com>>
Subject: Re: [GSBN] Straw on edge with stick (stud) frame

Hi Jim,

We've been doing this technique for a few years now, in a few different ways. We coined a term "StrawCell" to describe the hybrid system, a web search for that term should turn up a few blog posts and videos. I'm not sure if I was the originator of the post, as others have been using this technique as well, but I'd be happy to chat further.

Cheers,
Jacob

On Mon, Jul 4, 2016 at 4:58 AM, Jim Carfrae <jim.carfrae at plymouth.ac.uk<mailto:jim.carfrae at plymouth.ac.uk>> wrote:
Hello

A couple of years ago details of a bale wall system using bales on edge against a stick frame were posted here.
I can’t find the original post, and would like to contact the originators of the idea.
Can anyone out there help?

Jim

Dr Jim Carfrae
Environmental Building Group
Room 302 Roland Levinsky Building
School of Architecture, Design and Environment
Plymouth University
Drake Circus
Plymouth PL4 8AA

07880 551922
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