FAQs

It is good practice to seal board joints with Rectitape as it controls the rate of passage of water vapour and improves the airtightness of the building envelope. Abutments with other construction elements should be sealed with a low modulus silicon sealant.

No. Cables can penetrate the insulation with no detriment to the cable sheathing.

Recticel boards have minimal water uptake due to their closed cell structure. During immersion in water for 24 hours, water absorption is limited to around 2%. The closed cell structure means that even when wet, Recticel boards will maintain their integrity. Other common types of cavity insulation such as mineral wool batts and blown insulation can slump when wet and retain moisture for longer, slowing down the wall drying process.

The R-value, or thermal resistance, is a measure of the insulation board, dividing the thickness (in metres) by the thermal conductivity (lambda value, W/m·K). The R-value can be used to compare how different thicknesses of products with different lambda values perform.

A simple chemical reaction between two raw materials (polyol and isocyanate) which, in reaction with a blowing agent, expands to form polyisocyanurate (PIR) foam. The reaction is exothermic and the embodied energy arising from the manufacturing process is minimal.

The foam expands and bonds to foil facing materials. As it cools, it becomes rigid and is cut to the required dimensions

Our boards are an extremely efficient form of insulation and over the life of a building, will save far more energy in their use than required in their production, resulting in significant reductions in energy consumption and cost, as well as reduced CO2 emissions.

All Recticel Insulation products use CFC and HCFC free materials in their manufacture, and as such have a global warming potential (GWP) of less than 5, and zero ozone depletion potential (ODP).

Recticel Insulation, Stoke-on-Trent (UK), has been approved by Lloyd’s Register Quality Assurance to the ISO 14001:2004 Environmental Management System standard.

Recticel Insulation products manufactured in the UK have a summary rating of A+, as per the 2008 Green Guide to Specification produced by the BRE. The detailed breakdown of that rating is available under element number 815320017.

Different breather membrane manufacturers have different guidelines for their products, and these should always be consulted prior to installation.

In addition to the DPM (normally a 1200-gauge polythene sheet), a 500-gauge polythene VCL should be laid over the insulation if a concrete slab or a screed is to be poured on top.

This will protect the foil face of the board from alkaline within the concrete and provide a barrier to stop water contained in the slab/screed from penetrating the board joints. It also stops the board joints being opened by poured concrete and causing a thermal break.

If a floating timber floor is to be laid, the VCL should be installed below the floor finish.

Recticel Insulation prides itself on the quality of its product, particularly its dimensional stability and flatness. We consider the quality of our boards to be second to none.
Recticel operates a Quality Management System in accordance with the requirements of BS EN ISO 9001:2008 and offers CE Marking to ‘ISO EN 13165 – Thermal insulation products for buildings.

Eurothane GP boards are compatible with both hydronic and electrical under floor heating systems. Clipping a wet system through the VCL described above will not compromise the performance of the VCL or the insulation

No, our boards do not release any sort of gas or toxins – harmful or otherwise – when used in hot situations (e.g. lining a sauna). As long as the correct instructions/processes are followed when using and installing the boards, an indefinite and consistent service life and performance can be expected.

Yes, our boards can be used both between and over ceiling joists in either new-build or refurbishment projects. Eurothane GP can be used over the joists ready for boarding out – the compressive strength of the product is acceptable for a loft intended for storage and occasional access.

No, as this would reduce the performance of the boards.
Any cables penetrating or lying against insulation should be oversized to cater for increased operating temperature. If in doubt, consult a qualified electrician.

You can use PVA to glue your PIR to your GIB board.  If you want to glue the PIR board to a metal, please use a polyurethane product like Sellys liquid nails rapid cure.

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