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Carnation Walling - Finishing Forming

Star Implement groove keyway and holes for pipes etc and add extra bracing.


Implement groove plank, wood cubes, and walkways


Implementing and bracing pipes through walls

Where there are holes to allow electrical, plumbing, utilities, and vents through the concrete wall, it is best to use 4" PVC pipe cut to a length of XX".  This is the right length for the wall width plus two pieces of 2-by either side to brace it.  Where it is the actual 4" PVC pipe that will be used (eg air ducting), make the pipe longer so it can be joined to other piping.

Hole bracing inside 

Hole bracing external 

Full set of ICF holes 

(The pictures show bits of 2x4 to sometimes attach to the vertical bracing, but it is better to just always use Kreg screws to the batons.)

Things not to forget

Through walls

Electrical main feed through back wall

Well water main feed through back wall

Internet through back wall

Propane through south wall

Pressurized rain water through west wall

Power for external wall power outlets

Power for external lights (plan them in AutoCAD)

Motion activated yard zone wires

Water pex to external hose faucets

HRV inlet and outlet 6" vents (two sets as two HRVs)

Combustion air intake and outlet for wood fires

Tumble dryer vents

Bathroom extractor vents

Kitchen extractor vent

Vent from server room

Hot and cold water for external shower

Water pipes through internal walls

Fire sprinkler pipes through internal walls

Muddy water sink pipe to yard

Wall alcoves in internal walls (eg up the stairs)

Bolts for any wall mounted toilets

Central vac though internal walls

Earth wire through west wall

Wires to generator hookup plug

Cat-6 from DSL modem (elsewhere on property)

TV feed

Spare holes

Through ceiling

DWV stack pipes

Toilet holes for floor above

Floor drains for floor above

Shower u bend holes for floor above

Bath u bend holes for floor above

HRV stale and fresh 4" PVC pipes

DWV vent pipes

Hooks for kitchen island roof

Hooks for chandeliers (and swings etc)

Sink pipe from kitchen island sink

Electrical up to floor above

2" water pipe for sprinklers to floor above

Vent from safe room

Trash pipes (eg from kitchen to basement)

Compost pipe (from kitchen to basement)

Fire ash shoot (from living room to basement)

Central vac

Holes under pilasters for floor above


TV feed?

Spare holes



Inspection holes

Inspection hole under window 

Inspection hole under door 

Inspection hole plug 


Additional bracing 

Wherever you think there might be a weak area in the wall it is good to add some extra bracing.  Typically this means some horizontal pieces of 2x4 that are screwed between the vertical bracing assemblies.

Sometimes a long horizontal plank is useful to keep two windows in line.  It also forms a useful shelf for tools and lights.

Bracing shelf across windows

Bracing inside before concrete pour


Install bolts for railings

See here .


Move 6mil polyethylene edges

The large polyethylene sheet that hugs the contours of the EPS flooring blocks currently extends to over the 8" of wall EPS.  The vertical rebar in the walls will be through puncture holes in the sheet.  Just ahead of the concrete pour you need to cut and move the edge to go down the inside of the wall plywood.


During Concrete Pour

The actual concrete pour is handled in the next step, but it is worth noting that immediately after the pour, while the concrete is still wet, it is necessary to check the walls are still accurately vertical and if necessary adjust them using turnbuckles on the angled bracing.


After Concrete Pour

Remove the wall ties

Undo the nuts and pull out the threaded rod.


Remove thick plywood

The construction grade thicker plywood is easy to remove because the thin plywood stops the concrete from touching its surface.  

Squirt PL-Premium into holes in thin ply

As well as filling the holes so they can be sanded and painted, the PL-Premium also secures the plastic pipe to the thin plywood so the plywood is less likely to fall off the concrete wall.


Fill EPS holes from outside

Do this all the way through with foam gap filler .