Wood Fibre Product Range

Our Products

Please see our range of Naturheld Wood Fibre Insulation, Ampack Membranes and Tapes and Baumit Plasters and Renders below. Rawlplug Fixings are also available.

Naturheld Wood Fibre Products

Naturheld 220

A water-resistant multifunctional insulation softboard with T&G for internal and external use. Used as a sarking board on roofs and walls with ventilated cladding, or can be directly lime plastered internally. Not suitable for external rendering.  

  • Board Size Coverage Area: 2528 x 593mm – 1.499m²
  • Board Size Gross Area incl. Tongues: 2550 x 615mm
  • Board Thicknesses: 22 & 35mm
  • Board Density: 220kg/m³

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Naturheld 180

A versatile water-resistant insulation board, with T&G, for internal and external use. Can be used as a sarking board on roofs or walls with ventilated cladding. Naturheld 180 can also be directly plastered or rendered with breathable products over timber frame or masonry walls. 

  • Board Size Coverage Area: 1856 x 591mm – 1.0969m²
  • Board Size Gross Area incl. Tongues: 1880 x 615mm
  • Board Thicknesses: 40 & 60mm
  • Board Density: 180kg/m³

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Naturheld 140

A very versatile, water-resistant insulation board, with T&G, for internal and external use. Can be used as External Wall Insulation (EWI) and finished with ventilated cladding or render. Can be used as Internal Wall Insulation (IWI) and finished with lime plaster or plasterboard.  Must use 80mm min. on STUD walls, when plastering or rendering. Also ideal to use on roofs over rafters. 

  • Board Size Coverage Area: 1856 x 591mm – 1.0969m²
  • Board Size Gross Area incl. Tongues: 1880 x 615mm
  • Board Thicknesses: 60, 80, 100, 120, 140, 160, 180, 200*, 220*mm (*Longer Lead Times)
  • Board Density: 140kg/m³

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Naturheld Flex

Flexible wood fibre insulation batts for internal use between studs, joists and rafters. Not water-resistant. Very dense at 50kg/m3, so it fits snugly without slumping. Also offers excellent acoustic absorption.  Available in 575mm widths.

  • Batt Size Coverage Area: 1220 x 575mm – 0.7015m²
  • Batt Thicknesses: 50, 80, 100, 140mm
  • Special Thicknesses Available: 40, 60, 120, 160, 180, 200, 220, 240mm
  • Density: 50kg/m³

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Naturheld 220 Reveal Board

A water-resistant square-edged softboard specially for reveals in internal and external use. Can be finished directly with breathable render or plaster or used with ventilated cladding. 

  • Board Size Coverage Area: 1250 x 600mm – 0.75m²
  • Board Thickness: 22mm
  • Board Density: 220kg/m³

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Ampack Membranes & Tapes

Ampatop Protecta plus Breather Membrane

External Breathable Membrane with two-way self-adhesive integrated strips – wind & raintight. Use directly to the outside of Naturheld wood fibre boards or Naturheld Flex on roofs and walls.  Seal short ends with Ampacoll XT60 or Flexx pro Tape. If mechanically secured, Ampatop Protecta plus breathable sarking membrane can be left exposed to the weather for up to 3 months. Water Vapour Permeability Sd: 0.25m. 1.5 x 50M Roll

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Ampatex Eco 5 extra Airtightness Membrane

Internal Vapour Control and Airtightness Membrane (not self-adhesive) for warm side of vapour-permeable insulation. The smooth, printed side faces into the room. Bond membrane to structure with Ampacoll RA adhesive.  Prime porous or dusty surfaces first with Ampacoll Primax. Seal overlapped areas of the membrane with the airtight Ampacoll INT or Flexx pro Tape. Water Vapour Permeability Sd: 5.0m. 1.5 x 50M Roll

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Ampacoll Flexx pro Airtightness Tape

Internal & External Airtight & Windtight acrylic adhesive tape for sealing membranes or OSB for airtightness. Tearproof, yet flexible, adhesive tape with serrated areas to allow easy tear-off by hand.  Ampacoll Primax Primer required on all absorbent surfaces e.g. wood fibre.

60mm: Ideal for airtight and windproof sealing of membrane overlaps, board joints and penetrations.
100mm/150mm: Ideal for airtight and windtight lining of component joints and wood fibre boards on ridges, hips and grooves. Slit liner.

  • 60mm x 40M Roll
  • 100mm x 25M Roll with 2 peel-back strips 
  • 150mm x 25M Roll with 2 peel-back strips 

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Ampacoll XT DS Ext/Int Tape

Acrylic adhesive tape for air and windproof taping of rafters and corner connections, and for sealing window frames externally. The DS version has double slits in the backing liner for easy, staged fixing of the adhesive tape to the component. Makes work easier and quicker and increases the adhesive quality as the adhesive tape sticks and remains where it is meant to be. Suitable for external and internal use.

  • 60mm Wide x 25M Roll (12/18/30mm Strips)
  • 100mm Wide x 25M Roll (12/38/50mm Strips)
  • 150mm Wide x 25M Roll (12/63/75mm Strips)

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Ampacoll Fenax Airtight Window Tape

Window connection tape, which creates an airtight seal of windows and doors after installation. Fully adhesive on one side with split liner. Moisture variable tape that is safe to plaster over. No primer required on dry surfaces. Can be used internally and externally. 

  • 75mm Wide x 25M Roll (12/63mm Strips)
  • 100mm Wide x 25M Roll (12/88mm Strips)
  • 150mm Wide x 25M Roll (12/138mm Strips)

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Ampacoll Primax Primer

Solvent-free and quick drying primer, to use on wood fibre and other porous surfaces,  before bonding Ampacoll butyl and acrylic adhesive tapes to them.  

Typical Consumption: 65-85m for 60mm width, depending on surface. 

4 – 5m² coverage approx per 1L Bottle.

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Baumit Plasters and Renders

Internal Plasters

Baumit RK38

Internal Lime Plaster Dubbing Out Coat to level out uneveness in wall over 8mm.  Can go on in 10-15mm layers at a time. 2 or 3 layers can be used if required. 2nd layer can go on when 1st layer is slightly hard. 

  • Coverage 1.3kg/m²/mm. 35kg Bag.

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Baumit RK70

Internal Lime Base Coat over Naturheld wood fibre boards at 6mm thickness. Can also be used as a textured Top Coat at 2-3mm thickness. In addition, it is used as a 5mm Bonding Coat to bond the Naturheld wood fibre boards to lime-plastered walls. This eliminates the risk of air pockets occurring between the wall and wood fibre insulation, which could lead to interstitial condensation. 

  • Coverage 1.4kg/m²/mm. 25kg Bag.

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Baumit Klima Glätt W

Internal Lime Plaster Topcoat – natural fine smooth white finish at 2-3mm thickness. 

  • Coverage 1.0kg/m²/mm. 20kg Bag.

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External Renders

Baumit MC55

Multi-purpose White Base Coat External Render. Also high adhesion Bonding Render to bond wood fibre insulation to masonry. Also use to bond XPS insulation in the plinth area.

  • Coverage 1.0kg/m²/mm. Depth 6-9mm for Base Coat and 5mm for Bonding Coat.
  • 25kg Bag.

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Baumit Premium Primer (DG27)

Premium Bonding Primer for use before application of SilikonTop Render. Vapour permeable liquid primer with aggregate.

  • Coverage 65m² per Tub. 20kg Tub.

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Baumit SilikonTop

Pre-mixed, highly water-repellent, but vapour-permeable, silicone-based topcoat render finish. Use over old and new lime and mineral coatings and concrete surfaces. Primer required. Self-coloured. White or Coloured. 25kg Tub.

  • K1.5mm (1.5mm grain). Coverage 10m² per Tub.
  • K2mm (2mm grain). Coverage 7.8m² per Tub.
  • K3mm (3mm grain). Coverage 6m² per Tub.

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Internal and External Use

Baumit NHL Thermo

Baumit NHL Thermo is a cement-free, mineral-based, highly permeable, moisture-regulating and lightweight insulating plaster. It consists of NHL lime and mineral lightweight aggregates suitable for internal and external use. Particularly suitable on mineral substrates for traditional and historical buildings. It is not suitable in plinth or splash water areas or behind tiling. 0.08 W/mK. 30mm max per layer. Total max thickness is 80mm.

  • Coverage: 0.37kg/m²/mm. 1 Bag for 40mm / m². 14.5kg Bag.

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Baumit StarTex Reinforcing Mesh

Alkaline resistant, glass fibre textile mesh to be used in Baumit plaster and render systems.

  • 50M long x 1M wide Roll

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