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VITCAS Vermiculite Insulating Cement is a lightweight insulation cement formulated with exfoliated vermiculite ultra-lightweight aggregate. This product offers exceptional insulation properties, being approximately 20% of the weight of traditional cement mixes. A 25mm layer of this material provides the same insulation value as 500mm of standard cement, making it an efficient choice for thermal insulation in a variety of applications.
Key Characteristics
Non-Combustible: Complies with building regulations for fire safety, making it suitable for use in fire-related installations.
High Insulation Efficiency: Provides superior thermal insulation with minimal material thickness.
Lightweight: Ideal for applications requiring low-density, high-insulation materials that are non-combustible.
Applications
Filling gaps between firebacks and fireplaces, improving thermal efficiency.
Can this insulating cement fill gaps behind a fireplace fireback?
Answer
Yes. VITCAS VIC Vermiculite Insulating Cement is designed for lightweight, non-structural infill between firebacks and fireplaces. It helps insulate otherwise empty spaces without adding the weight of a conventional cement mix. The material should be used only as backing insulation and must not be relied upon to provide structural support.
Question
Is it suitable behind a Victorian cast-iron fireplace?
Answer
Yes. It is suitable for filling and insulating gaps behind Victorian-style cast-iron fireplaces. Its lightweight vermiculite formulation makes it practical where a bulky traditional cement mix would add unnecessary weight. The completed installation must be protected from water ingress, and the cement should not be used where structural strength or abrasion resistance is required.
Question
Can vermiculite insulating cement be used in a pizza oven?
Answer
It can be used as non-structural insulating infill for gaps in outdoor pizza oven installations. The material helps reduce heat loss while remaining considerably lighter than a traditional cement mix. It is not a weatherproof outer finish, so it must be fully protected from rain, moisture and other sources of water ingress.
Question
Can I use this as render behind a wood-burning stove?
Answer
No. This product is intended primarily for insulating infill, such as filling the space behind a fireback, rather than forming a rendered surface behind a stove. We recommend VITCAS FR Fireplace Render for that application. Selecting the correct product prevents a lightweight insulating material from being used where a durable render coat is required.
Question
Can this insulating cement support structural loads?
Answer
No. The VITCAS VIC cement is formulated as lightweight backing insulation and non-structural infill. It should not be used to support masonry, firebacks or other components, or in areas exposed to regular abrasion. Any structural part of the installation must be properly supported using materials designed for that purpose.
Question
Does vermiculite insulating cement need protection from water?
Answer
Yes. The material must be protected from water ingress because it is an insulating cement rather than a waterproof coating. This is particularly important in outdoor pizza oven projects and other exposed installations. Ensure the surrounding construction prevents rain or moisture from reaching the insulating layer before the installation is commissioned.
Question
How much area does a 10 kg tub cover?
Answer
A 10 kg tub covers approximately 0.5 square metres when applied at a thickness of 12mm. Actual requirements will depend on the dimensions and depth of the gaps being filled. Measure the total infill area and intended thickness before ordering, allowing for uneven spaces around firebacks or oven components.
Question
Why use vermiculite cement instead of ordinary cement?
Answer
The vermiculite formulation provides insulation with much less weight than a traditional cement mix. It is approximately 20% of the weight of conventional cement mixes, while a 25mm layer provides the same insulation value as 500mm of standard cement. This makes it useful for lightweight insulating infill, but not as a structural substitute.
