Glidevale Protect VC Foil Ultra AVCL

Suitable for timber, masonry or steel construction. Can be used on walls, ceilings and floors to significantly improve thermal performance and reduce air leakage in any construction.


Protect VC Foil Ultra is a robust, highly reflective air and vapour control layer (AVCL), offering low emissivity to enhance the thermal performance of walls, ceilings and floors. Suitable for timber, masonry or steel construction, VC Foil Ultra provides strong insulating properties when installed facing into a still airspace. This ensures significant thermal and performance benefits when compared with conventional vapour control materials.

Features and benefits:

  • Delivers an airtight system with sealed laps.
  • Excellent air and vapour resistance.
  • Helps avoid condensation risk in accordance with BS 5250.
  • Available with integrated tapes for quicker installation and reliable, effective joint sealing.
  • Low emissivity reflective surface enhances the thermal performance of the structure when used in a still air cavity.
  • Corrosion and damage resistant reflective surface.
  • Excellent nail tear resistance.
  • High tensile strength, tough and durable.
  • Easy to cut and lightweight to handle.
  • BM TRADA independently certified for all applications and compliant with Building Regulations.
  • Class 1 surface spread of flame to BS 476-7.

General information






Non-woven core

Solid corrosion resistant aluminium layer

Triple ply construction




1.35 x 50 m

Include option with integral lap and sealing tapes.

1.5 x 50 m

Include option with integral lap and sealing tapes.

2.7 x 50 m

2.7 x 100 m

3.0 x 50 m

Uniclass 2015

Pr_25_57_10_94 Vapour permeable sheetsPrimary
Specification data - Vapour permeable sheets Enhanced data


To BS EN 13859-1.

BS 5250.

BS EN 15976.

BS EN 8990.

BS EN 12572.

BS EN 13111.

Performance characteristics

Resistance to water penetration to BS EN 1928 Pass W1.

Emissivity of the surface aged 0.03 to BS EN 15976 and BS EN 8990.

Thermal resistance (unaged) 0.81 (M2K/W).

Class (minimum)


to BS EN 1928 with mods


Aluminium foil face.

Triple ply construction.

Non-woven polypropylene core.



Third-party certification

BM TRADA Certified.

Weight (minimum)

150 g/m².

Thickness (minimum)

0.48 mm.

Reflective face



Installed on the warm side of the structure immediately adjacent to the insulation.

Product Reference

Glidevale Protect VC Foil Ultra AVCL

Tear strength

239 N.

MD (along roll) - (N) to EN 12310-1 with mods.

243 N.

CD (along roll).


210 (N/50 mm).

MD (along roll) - (N/50mm) to EN 12311-1 with mods.

205 (N/50 mm).

CD (across roll) - (N/50mm) to EN 12311-1 with mods.

Water vapour resistance

4946 MNs/g / 989 Sd.

To EN 1931.

Thermal resistance

0.81 m²K/W.

Unaged - heat flow horizontal to BS EN ISO 8990 and BS EN 15976 (incorporates printing).

0.78 m²k/W

Aged - heat flow horizontal to BS EN ISO 8990 and BS EN 15976 (incorporates printing).


0.02 ɛ.

Unaged to BS EN 15976.

Emissivity (aged)

0.03 ɛ.

Aged to BS EN 15976.

Flame spread (to BS 476-6 and BS 476-7)

Class 1.

To BS 476-7.

Environmental information

Contains Red List materials


Country of product manufacture

United Kingdom

Recycled content

Case Studies
Third party certifications
Similar products from BPD Building Product Design Ltd