Beco Wallform Selfbuild
Posted 05 January 2016 - 03:35 PM
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on this plot
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with this stuff - http://becowallform....y-step-process/
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A lot of hard work but well worth the trouble. I only employed help when I needed it.
Couple of university guys on sabbatical were my main help. Total cost was just under £100,000.
There are three en-suite double bedrooms.
Lots more to come. Lot of detail. Not sure how deep to take it.
Posted 05 January 2016 - 03:51 PM
Sounds like you did well on the cost front!
Posted 05 January 2016 - 05:06 PM
Posted 05 January 2016 - 05:32 PM
I really like the idea of the product, it looks very sound and according to the bumph the ICF systems are very air tight.
In the coming years I will probably look for a site in Australia, I have considered this system as I could do most of the work myself where as timber frame and block work need someone who knows how to sling a hammer or throw a trowel, also termites don't eat the stuff which is important if building near bushland.
Edited by sketch3d, 05 January 2016 - 05:32 PM.
Posted 06 January 2016 - 09:05 AM
Needed heavy machinery here.
Radon barrier protected with Terram and start reinforcing.
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Final checks on all the wires. Nothing must move. 0203.JPG 81.21K 17 downloads
Start the concrete pour. And level off while waiting for final load to arrive.
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Will start on the Beco next. Picture in first post shows about three quarters of material to be used.
Posted 06 January 2016 - 08:04 PM
I arranged for a chartered engineer to draw up the house from sketches
wife and I scrawled up. Drawings from the engineer are very plain.
0302.JPG 63.16K 28 downloads Here the ground floor walls are plugged together like lego.
All corners and door and window openings MUST be firmly braced. 0303.JPG 46.42K 23 downloads
0304.JPG 45.05K 29 downloads The top edges of the Beco blocks are taped to keep cement off. Scaffolding set up for easy access to top of Beco during cement pour.
This is the reinforcing in the lintel blocks for all doors and windows. 0309.JPG 33.77K 21 downloads
The scene is set for the first cement pour into the ground floor walls and the first big mistake.
Posted 06 January 2016 - 08:10 PM
Posted 06 January 2016 - 08:20 PM
Also during my working life I handled electronics, not much experience there for a prospective bricky.
I saw Beco in a house show and thought I could handle that. Never heard of all the other stuff at that time.
I've got a comfortable mortgage free house so I guess it worked.
Posted 06 January 2016 - 10:01 PM
Excellent thread so far, and I'm awaiting the conclusion of post #6 's "big mistake" comment
The best threads on here are where the bumps in the road are just as well documented as the triumphs
Posted 07 January 2016 - 07:06 AM
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There should be an 'S' bend funnel on the end of the pipe so the cement can be poured carefully into the wall blocks. Remember it has a long way to go down and there are reinforcing rods in the walls.
Because the cement had the WRONG CHIP SIZE the funnel kept blocking up so the funnel was removed.
The cement did not always reach all parts of the wall and NO VIBRATOR was used to help settling.
I wasn't aware of the implications of this until this part of the job was nearly finished.
The chap I had employed to help was a builder and realised there was a problem but did not discus it with me.
To wards the ind of the pour, e started using a rod to try and help the cement to settle into the walls.
Unfortunately this caused a couple of lower blocks to BURST! Cement poured out of the wall. He didn't know what to do next.
Posted 07 January 2016 - 07:15 AM
Virtually every programme or book feels obliged to mention bursts when they refer to ICF, but it's a bit unfair as in almost every case, there is a reason for this happening that could have been prevented.
The pump operator should have known better surely?
Posted 07 January 2016 - 07:28 AM
Anyway, I wrenched out the broken blocks but of course you cannot fit blocks back into the hole. So I carefully cut he top edge of each block, there were two needed replacing, and fitted the modified blocks back into the hole. Blocks now had to be supported while they were filled again from the top of the wall. This was done with a couple of planks each side and two long threaded rods with nuts bolted each side. It worked. The pour was completed and I gave that builder chappy his marching orders. Took over the whole build from that point on.
Posted 07 January 2016 - 07:42 AM
Richard you're so polite...I like your style
Posted 07 January 2016 - 07:43 AM
The chartered engineer who drew up my plans did tell me "Beco leaks." I couldn't see how and ignored it but will explain more in due course as I have had MANY leaks and am still fixing them. TEN YEARS ON!
Posted 07 January 2016 - 07:51 AM
But have always had concerns about this 'bursting' problem.
We used to make very large moulds for textured concrete (think motorway cuttings, so several tens of meters long and high). They constantly had problems on site (one of my coldest days was on the M25 at Reigate).
So what is the real advantage of using these systems when compared to shuttering, pouring and then insulating?
I like the look of your house.
Posted 07 January 2016 - 09:03 AM
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Looks like the block was left near something very hot and shrank a bit. I still used it.
The bolt head came out of the hole. Assume there must have been a problem with the mould machine.
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This picture shows the worst problem. That little bit of raised round cast prevents the next block from seating correctly and the smooth line of the join is lost. All blocks had to be checked for these imperfections which had to be removed.
Posted 07 January 2016 - 02:23 PM
Selling up here I can buy a really good site not far from the beach or in the mountains near the Gold Coast, but leaves little left for the build unless I compromise on the site...
Edited by sketch3d, 07 January 2016 - 02:24 PM.
Posted 07 January 2016 - 04:14 PM
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I then positioned each beam by hand and started filling with concrete blocks.
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There we go, first floor 95% finished and very fire proof. I used over 700 blocks in the build.
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Posted 07 January 2016 - 04:36 PM
Posted 07 January 2016 - 05:09 PM