Insulating Concrete Formwork System
What is Amvic ICF?
Amvic ICF consists of high density polystyrene panels 1200mm long x 400mm high x 65mm wide, spaced apart by high strength polypropylene webs. The forms provide a fully insulated, permanent shuttering system into which concrete is poured. Once cast, the solid concrete core provides the necessary structural integrity of the building, insulation, fire safety, thermal mass and durability for the structure’s lifetime.
The polystyrene panels of each block provides insulation to the structure with U-values ranging between 0.24 W/m2k and 0.13 W/m2k being achieved.
The forms themselves weigh approximately 3.5kg and are simple and easy to build.
Benefits of using Amvic ICF
Amvic ICF can bring many benefits to your project. The combination of the patented, reversible FormLockT, EPS composition, innovative web design and web spacing result in:
- Using AMVIC ICF requires less support during installation giving straight, flat and plumb walls.
- Less wastage when compared against other ICF or building systems available.
- The ability to withstand internal concrete vibration, ensuring a structurally superior wall.
The forms are very user friendly due to its innovative design, helping to increase the speed of construction, reduce labour costs and provides the highest level of performance throughout and after construction. Amvic ICF walls can be finished internally by using gypsum board screwed directly to the integral webs and a wide range of external finishes can be used e.g. stone, timber and brick etc.
Frequently Asked Questions
Q. How high can you concrete the Amvic system in a single pour?
A. Up to 3m of concrete can be placed in any single concreting day.
Q.Does the concrete core require steel reinforcement?
A. Within the UK, retaining walls and structures taller than 3 storey high will require reinforcement throughout. Low rise structures will require steel reinforcement only over the top of window and door openings.
Q. How does fire affect the system?
A. The polystyrene bead used in the production of the Amvic system is a flame retardant grade. If the forms were exposed to a naked flame the polystyrene will burn however, once the flame is withdrawn or the Amvic burns clear of it, the polystyrene will self-extinguish therefor the system will not contribute to the spread of fire. Additionally, the solid concrete core cannot burn conveying how safe the use of Amvic systems really are.
Q. How are internal services accommodated?
A. Electrical conduits and water pipes can be recessed into chases cut into the polystyrene at the time of installation. Please note: PVC cables should be kept from direct contact with polystyrene by placing it inside a plastic conduit.
Q. How is a masonry finish achieved?
A. A masonry finish can be achieved by either building a full brick or stone skin around the Amvic shell or by applying brick / stone slips directly to the surface of the Amvic blocks. The bricks/stone wall ties are cast into the Amvic concrete core to support the masonry skin option whereas slips are bonded to the Amvic system using a high adhesive bonding mortar over a supporting expanded metal lathing which is pinned back to the Amvic concrete core.
Q. Can you render onto an Amvic system?
A. Acrylic or polymer modified render systems that have been designed to be applied onto polystyrene are available. This type of system does not require a supporting eml.
Amvic Insulating Concrete Formwork Systems are available from BHC Merchants. Speak to a member of our team today to find out more.