What is COFFOR ?

COFFOR is a lightweight structural formwork system to build reinforced concrete. It is a stay-in-place formwork that reinforces the construction.

What are COFFOR and COFFOR INSULATED made of ?

COFFOR is made of rib lath, C shaped profiles (both produced from hot galvanized cold rolled steel in coil) and articulated rebar loops (produced from steel rebar).
COFFOR INSULATED is made with the same components but includes an insulation material such as polystyrene or polyurethane. See section COFFOR TECHNICAL SPECIFICATIONS.

What are the dimensions of COFFOR panels ?

Standard widths of COFFOR are 1220 mm (48’’), 990 mm (40”), 760 mm (30”), 530 mm ( 21”) and 300 mm (12”). Heigth is according to order. Standard thickness of COFFOR is 150 mm (6”), 200 mm (8’’) and 250 mm (10’’). Other thickness are available on request.

What can be built with COFFOR ?

COFFOR is used for building walls in all types of construction: single-family homes, multi-unit apartment buildings, lavish residences, luxurious high rise buildings and all types of industrial/commercial buildings. It is used for radius walls, blind walls, retaining walls, slabs, floors, inclined or flat roofs, infrastructures, foundations, columns, beams, rehabilitation, reinforcement, swimming pools, water tanks, civil works and much more.

Is there a limitation on the number of floors that can be built with COFFOR ?

No. The limit is the same as for all reinforced concrete constructions.

What is the height limitation of a COFFOR wall ?

There is no height limitation. Walls 12 m (39 ft) high were built by positioning 3 COFFOR
4 m (13 ft) high panels poured one after the other.

Is COFFOR reusable after concrete has been poured ?

No. COFFORis not reusable as it remains integrated in the wall after the concrete is poured.

What are the advantages of COFFOR ?

COFFOR offers all the advantages of reinforced concrete systems. Compared to other constructions, COFFOR:

• Is cost effective.
• Is faster to implement.
• Is easier to implement (no skilled labor, no lifting device, etc...).
• Offers more creative possibilities.
• Can be used with an integrated insulation material.
• Is available as COFFOR KIT.
• Is available as COFFOR INSULATED.
• Is environmental friendly.

Why is COFFOR implementation faster than other construction systems ?

Every phase of the process is easy and fast:

• Placement, alignment and bracing.
• Setting of openings.
• Rebar insertion (if necessary).
• Service conduit penetration.
• Concrete pour.
• No stripping.

How does the cost of COFFOR compare to other construction systems ?

In most cases, COFFOR is cost effective as there is significant time saving:less labor, less rebar, no crane, no anti-cracking welded wire and less overhead.

Are qualified workers required to use COFFOR ?

No. Unqualified workers can easily use COFFOR. Most are trained in 2-3 days directly on-site.

What are the advantages of COFFOR over Insulating Concrete Formwork (ICF) Systems ?

What are the advantages of COFFOR over Insulating Concrete Formwork (ICF) Systems?
A. COFFOR has several advantages over ICF Systems: it is structural, has no height limitation, is not fragile, does not require skilled labor, does not require any concrete additive, has no condensation risk and is less voluminous for transport.

How is electrical and plumbing done ?

Electrical conduit and plumbing are easily inserted in COFFOR prior to the pour by cutting the lath with a shear or a circular saw.

Is a special concrete mix required with COFFOR ?

No. The same concrete mix as in other waterproof formwork systems is used. Maximum aggregate size should be 20 mm (3/4’’). Recommended slump is 15-18 cm (6-7’’). Concrete is poured with a pump, a bucket or a shovel.

Is vibration necessary ?

Vibration is not necessary but possible if needed. Concrete placement is easily viewed directly through the grids. Roding or taping the outside surface of the wall is enough. A pencil vibrator 25 mm (1’’) can be used, staying 40 mm (158’’) away from the rib lath.

During pour how much concrete escapes through the COFFOR grids ?

Less than 1 to 2% escapes but can be picked up and poured back inside. Laboratory tests show that the concrete quality with COFFOR is superior due to the rapid elimination of excess water.

Are special equipment or accessories required ?

No. COFFOR is simple to use and does not require heavy infrastructure or equipment such as cranes. No specific accessories are necessary. The only requirements are those generally available on all construction sites such as gloves, hammers, electric saws, pliers, plumblines, steel wire, tubes, light planks, ladders, etc.

Is it possible to use COFFOR for part of a building and another formwork system for the rest ?

Yes. COFFOR can be combined with any construction system.

Can they be combined with prefabricated slabs ?

Yes. COFFOR can be combined with prefabricated slabs.

Can COFFOR be reinforced with rebar ? How is the rebar placed ?

For many constructions, no additional rebar are necessary since COFFOR provides the structural reinforcement.   If civil engineers   determine   that additional rebar are necessary, for example in highrise buildings or constructions in sensitive areas (earthquakes, hurricanes, etc.), they are easily added directly on-site. Vertical rebar are grouped in pairs and inserted from the top into the C profiles of COFFOR . Horizontal rebar are inserted between the C profile and the vertical rebar. It is not necessary to tie horizontal and vertical rebar as they are secured.

Can COFFOR be used in seismic areas ?

Yes. COFFOR is particularly well-suited for seismic areas as it builds shear walls. The rebar loops and steel cage provide an efficient confinement of concrete and prevent debris from scattering during an earthquake.

What finishes are used for interior walls ?

Any interior finish is possible. Plastering is easily applied due to the herringbone mesh that provides an efficient bonding. Drywalls can be pasted as well as wood, tiles, plastic, marble, etc. If an interior thermal insulation is required it is directly applied to the COFFOR wall.

What finishes are used for exterior walls ?

Any exterior finish is possible. Stucco as well as any projected finish bond exceptionally well due to the herringbone mesh that provides an efficient bonding. The characteristic of the finish, number of layers and thickness depends on local conditions. In aggressive areas like sea shores, waterproofing may be necessary. Other exterior finishes (wood, marble, etc..) are possible.

end faq