What are ICFs? : FAQs : Characteristics and design
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QUESTIONS:

Red Arrow What provisions need to be made for damp proofing?
Red Arrow Can Logix ICFs be used for party walls or compartments between dwellings?
Red Arrow How do you make sure you produce a straight flat wall?
Red Arrow How do Logix ICF walls perform in a fire?
Red Arrow How do you finish the walls internally?
Red Arrow How do you finish the walls externally?

 

ANSWERS:

Red Arrow

What provisions need to be made for damp proofing?

The most straightforward way for damp proofing is to use a water-proof concrete mix up to DPC. Either a sheet or liquid-applied membranes can be used. The final choice depends on the design of the wall and floor.

Red Arrow

Can Logix ICFs be used for party walls or compartments between dwellings?

Yes, they will be extremely efficient for both sound and thermal insulation.  This added to the 2hr fire rating, makes Logix ICFs ideal for party walls.
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How do you make sure you produce a straight flat wall?

Before pouring the concrete, alignment units are secured to the wall and floor, approximately every 1.5-2m. These allow you to align the wall perfectly once the concrete has been poured and before it sets. These units also prove support for access platforms, saving the cost of hiring extra scaffolding. Alignment units can either be hired or purchased from us. 

Red Arrow How do Logix ICF walls perform in a fire?
Logix ICF blocks filled with concrete give a 90 minute fire rating, which is increased by the addition of plasterboard, making them ideal for party walls.
Red Arrow How do you finish the walls internally?
The easiest and most common way to finish the internal walls is with plasterboard (drywall). The boards are simply screwed into the plastic webs, and then the joints are taped and skimed. The boards do not have to finsih on a web because they are supported by the EPS foam, this saves time and waste.
Red Arrow How do you finish the walls externally?

Logix ICF walls can be finished with lots of different finsihes to match your (or the planners) wishes.

Renders. The most cost effective finish is usually render, either traditional sand and cement or acrylic renders. Traditional render requires a metal mesh to be screwed to the webs to provide a key for the render to fix to. Arylic renders stick straight to the EPS, and then a fibre glass mesh is embedded within the base coat to adid strength.

Full Bricks, Stones. You can build a brick skin using full bricks or stones, leaving a cavity between the bricks/stones and the EPS to allow them to breath. This outer skin will need to be tied to the Logix wall with ties which can be screwed into the webs.

Complete Brick / Stone Slips Systems. There are a number of brick slips sytems availalbe which de-skill, and speed up creating a brick finish. These sytems give a much thinner overall wall than using a full brick skin.

DIY-Brick Slips.Brick slips can be applied diretly to a bed of waterproof, flexible tile adhesive. and then pointed up. This is much more like tilling than brick layin, and is cheaper but slower than the complete slip systems.

Alternatives. Logix walls can also be finished with timber cladding (both vertically and horizontally), tile hanging, and metal cladding. Thanks to the in built vapour barrier, and the webs finishing Logix walls can be a quick and painless process.
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