The ongoing issue of hard - to - treat walls in the UK can be overcome utilising Spacetherm® - an ultra - thin insulation for thermal upgrades, saving valuable space without altering the exterior fabric of the building. Spacetherm can be supplied on its own and cut to size or laminated to a number of facings to suit your individual requirements. Its remarkable performance is achieved through the use of flexible aerogel blankets. The insulation used in Spacetherm is material derived from silica gel.
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Material Properties

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Material Properties
Spacetherm
Property | Test Method | Result |
---|---|---|
Thermal Conductivity | 0.015 W/mK | |
Reaction to Fire (EN13501) | C-s1, d0 Class | |
Vapour Permeability | EN12086 | 5 μ |
Density | 150 kg/m3 | |
Thickness | 5, 10 mm | |
Surface Burning Characteristics (ASTM E84) - Flame Spread Index | ≤5 | |
Surface Burning Characteristics (ASTM E84) - Smoke Development Index | 20 | |
Maximum Operating Temperature | 125 C |
Spacetherm Cold Bridge Strip
Property | Test Method | Result |
---|---|---|
Width | 38, 50, 75, 100 mm | |
Thickness | 10, 20 mm | |
K-Factor Aerogel | 0.015 W/mK | |
Fire Resistance Aerogel (EN 13501-1) | C-s1, d0 Class | |
Water Vapour Resistance Sd | 0.05 m |
Spacetherm Wallboard
Property | Test Method | Result |
---|---|---|
Panel Size | 2400 x 1200 mm | |
Thickness - Plasterboard | 12.5 mm | |
Vapour Control Layer | 78.5 MNs/g | |
K-Factor Plasterboard | 0.19 W/mK | |
Fire Resistance - Plasterboard | A2-s1, d0 Class |
Spacetherm Directfix
Property | Test Method | Result |
---|---|---|
Panel Size | 2400 x 1200 mm | |
Thickness - Plasterboard | 12.5 mm | |
Thickness - Plywood | 6 mm | |
Vapour Control Layer | 78.5 MNs/g | |
K-Factor Plasterboard | 0.19 W/mK | |
K-Factor - Plywood | 0.13 W/mK | |
Fire Resistance - Plasterboard | A2-s1, d0 Class |
Spacetherm A2
Property | Test Method | Result |
---|---|---|
Reaction To Fire | EN 13501-1:2010 | A2-s1, d0 |
Thickness | 10, 20, 30, 40 mm | |
Width | up to 1500 mm | |
Colour | White | |
Thermal Conductivity | EN 12667 | 0.019 W/mK |
Density | EN 1602 | 190 - 200 kg/m3 |
Dimensional Stability | EN 1604 | Δ <0.6% @ 70°C, 48hrs |
Compressive Strength | EN 826 | 30 kPa at 10% compression |
Tensile Strength | EN 1607 | 16 kPa perpendicular to faces |
Tensile Strength | EN 1608 | 1085 kPa parallel to faces |
Short Term Water Absorption | EN 1609 (A) | 0.04 kg/m3 (partial immersion 24hrs) |
Long Term Water Absorption | EN 12087 (1A) | 0.10 kg/m3 (full immersion 48 hrs) |
Water Vapour Permeability | EN 12086 | 5 μ |
Organic Content | DIN EN 13820 | 3.8 Gew.-% |
CAD Detail Review
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Book MeetingThermal & Condensation Calculation
Demonstrating the thermal performance of a building element, or that the specified construction does not carry an interstitial condensation risk, are important steps in the design and approval process. Get project specific calculations with this service.
Request CalculationSpacetherm® - Aerogels In Building Refurbishment

The presentation discusses the basics of thermal insulation in buildings, with a particular emphasis on historical and traditional construction methods. Looking at thermal performance properties of various insulation materials and how they affect the balance of heat, air and moisture movement. It then moves onto the uses of high performance aerogel insulation in a variety of applications.
This is followed by an overview of hygrothermal assessment methodologies and the use of WUFI software for modelling moisture flow in buildings with practical examples of the benefits this can bring to building design.
Topics covered in this CPD:
- Basics of Thermal Insulation
- K, R and U Values
- Insulation Types
- What Is Aerogel?
- Hygrothermal Assessments & WUFI
Spacetherm Wall Liner

Spacetherm WL (Wall Liner) is a high performance laminate specifically designed to be fixed to internal surfaces of existing solid walls without the need for mechanical fixings. Spacetherm WL consists of 10mm Spacetherm aerogel insulation blanket bonded to 3mm Magnesium Oxide Board (MgO), for use in applications where improved thermal performance is required with limited space. Spacetherm WL can achieve similar performance to traditional plasterboard laminates, but at a fraction of the thickness, allowing specifiers greater flexibility and higher performance for refurbishment projects.
Spacetherm WL U-value Calculations
Wall Construction | Base Wall | 13mm Wall-Liner | Heat Loss Reduction |
---|---|---|---|
225mm brick | 2.06 | 0.81 | 61% |
300mm brick | 1.72 | 0.75 | 56% |
600mm stone | 2.18 | 0.83 | 62% |
Brick Cavity - unfilled | 1.45 | 0.7 | 52% |
Brick Cavity - filled | 0.58 | 0.40 | 31% |
Spacetherm Blanket
The Spacetherm Blanket consists of unfaced sheets of high performance aerogel composite insulation. The possible applications of the Spacetherm Blanket are virtually limitless as it has been used in doors, shutters, window reveals, boats, swimming pool covers and numerous other applications where thermal performance, space and thickness are critical.
Wraptherm

Wraptherm is a composite comprising 10mm Spacetherm Insulation blanket bonded to the face of Wraptite vapour permeable, airtight self-adhesive membrane. Use of Wraptherm provides improved airtightness levels combined with a reduction in thermal bridging. Wraptherm was developed for use in the refurbishment of existing buildings where there was a requirement to enhance both the thermal and airtightness performance of the building. Wraptherm can be applied to the internal face of the existing façade, providing a vapour neutral yet airtight layer, fully self-adhered to the substrate layer with the added benefit of a 10mm thick layer of high thermal performance Spacetherm insulation. Over this airtight/thermal composite framing can be installed with the cold bridging being reduced thanks to the Spacetherm layer. Additional thermal insulation can be included within the frame to meet the u values required for the refurbishment.
Spacetherm A-Rated

Spacetherm A-Rated is a flexible, high-performance, silica aerogel-based insulation material of limited combustibility used for exterior and interior applications. Supplied in a variety of finishes, the substantial layers of Spacetherm A-Rated meet the requirements for A2 classification (insulation, MgO and plasterboard). The product is used to optimise the thermal performance and fire properties of façade systems in a number of ways. These include enhancing the thermal performance of the ventilated façade, and addressing thermal bridging in the façade. Spacetherm A-Rated is also useful in minimising thermal bridges around windows in areas such as window reveals and roller shutter cases.
Spacetherm Multi
Spacetherm Multi is a high-performance laminate specifically designed to be laid directly onto existing floors & walls. Spacetherm Multi consists of Spacetherm Aerogel insulation blanket bonded to a 6mm Magnesium Oxide Board. Spacetherm Aerogel blanket is available in various thickness from 5mm to 40mm (in multiples of 5). For other thicknesses, or for U-value calculations for your project, please contact Proctor Technical services.
The solution is ideal for use in applications where low U-values are required and room space is at a premium (such as loft conversions). Spacetherm Multi can achieve similar performance to other insulation systems, but at a fraction of the thickness. This allows specifiers greater flexibility and higher performance for refurbishment projects.
Download Floors DatasheetDownload Walls Datasheet
Spacetherm Directfix
Spacetherm Directfix is a high performance laminate which is specifically designed to be fixed directly to the wall. It consists of Spacetherm Aerogel insulation blanket bonded to plasterboard, with an additonal pre-bonded plywood reinforcement to the plasterboard. This reinforced laminate will reduce the risk of shot-fired nails failing to create a robust fix and will also reduce the risk of drill bit snagging, should you be using a traditional mechanical fixing method.
Ideal for use in applications where low U-values are required but space is at a premium. Spacetherm Directfix is supplied with foil faced plasterboard as standard to reduce condensation. Plain plasterboard is available on request. Spacetherm Directfix lining boards can achieve similar performance to traditional plasterboard laminates, but at a fraction of the thickness, allowing specifiers greater flexibility and higher performance for refurbishment projects. Due to Spacetherm’s unique hydrophobic qualities it is also possible to directly fix Spacetherm Laminates to certain existing wall substrates (see installation guide for details).
Spacetherm Wallboard
Spacetherm Wallboard is a high performance laminate which is specifically designed to be fixed to timber straps. It consists of Spacetherm Aerogel insulation blanket bonded to plasterboard, and is ideal for use in applications where low U-values are required but space is at a premium. Spacetherm Wallboard is supplied with foil faced plasterboard as standard to reduce condensation. Plain plasterboard is available on request. Spacetherm Wallboard lining boards can achieve similar performance to traditional plasterboard laminates, but at a fraction of the thickness, allowing specifiers greater flexibility and higher performance for refurbishment projects. Due to Spacetherm’s unique hydrophobic qualities it is also possible to directly fix Spacetherm Laminates to certain existing wall substrates (see installation guide for details). For other thicknesses, or for U-value calculations for your project, please contact Proctor Technical services.
Spacetherm Window Reveal Board
Spacetherm WRB (window reveal board) is a high-performance laminate specifically designed to be fixed or glued to the existing solid wall at the window reveals. Spacetherm WRB consists of Spacetherm Aerogel insulation blanket bonded to plasterboard or magnesium board, with or without plywood reinforcement, depending on fixings. It is ideal for use in applications where low U-values are required but space is limited.
Installation
Spacetherm® WRB should be glued to the existing wall structure. Drilling is not recommended although it may be required for wiring and services. If drilling is required then care should be taken to compress the panel as much as possible to reduce the risk of insulation fibres wrapping around the drill bit.
Installation GuideInternal & External Reveal Angles
Spacetherm® WRB panels should be cut in such a way as to allow for the jointing of the plasterboard or fermacell and an unbroken run of insulation to the existing wall in both internal and external angles. Refer to Installation Guide for details.
Spacetherm Cold Bridge Strip
Spacetherm® CBS (Cold Bridge Strip) uses Spacetherm aerogel insulation encapsulated in polyethelene for use in the prevention of cold bridging through a component or element of a structure. Spacetherm CBS is an ideal specification when trying to reduce cold bridging in timber or steel frame structures. Upon request the Spacetherm CBS can be cut to a variety of widths to suit different applications.
Cutting
Spacetherm® CBS can be cut using scissors or knife. Care should be taken that cutting blades are kept sharp, if using a knife, the angle between the blade and the Spacetherm® CBS should be kept as low as possible. It is advisable to reseal the ends with tape after cutting is complete.
Fixings
Spacetherm® CBS is supplied with double sided adhesive tape for ease of installation. Spacetherm® CBS can be applied to either timber or metal framing systems.