Safeguard Ultrotherm Internal Insulation System


It is manufactured from a unique formulation of vapour-permeable polyurethane (PU) foam. Although it has a high resistance to damage from exposure to moisture, it is not intended to be used as a waterproofing barrier. It is manufactured in the UK under an ISO 9001:2008 certified quality management system.

It allows walls to be insulated without costly alterations to skirting boards, windows, covings and radiators. Although only 12 mm thick, it typically reduces heat loss through 9” solid brick walls by 40%, creating a more comfortable living environment and reducing energy bills.

It is supplied in convenient flexible tiles that allow it to be installed around awkward shapes and curves. Once applied, it can be plastered to create a wall surface ready for decoration. The thistle board-finish plaster is most suitable for skim coat plastering. Alternatively, thistle multi-finish, built-up layers of lightweight gypsum plasters or thistle hardwall plaster which increases impact resistance can be applied. It can be decorated with most paint types and wallpaper coverings once the plaster finish has dried.

To be applied by a suitably qualified contractor.

General information

Uniclass 2015

Pr_25_71_63_67 Polyurethane (PUR) foam boardsPrimary


P10/220 Sound insulation within timber framed separating wall

Specification data - Polyurethane (PUR) foam boards

Product Reference

Safeguard Ultrotherm Internal Insulation System

Standard product features


  • Thermal resistance of 12 mm Ultrotherm with plaster skim: 0.307 m² K/W.
  • Resistance of un-insulated 9” solid brick wall: 0.476 m² K/W.
  • Resistance with 12 mm Ultrotherm: 0.783 m² K/W.
  • U value of un-insulated 9” solid brick wall: 2.1 W/m² K.
  • U value of 9” solid brick wall with Ultrotherm: 1.2 W/m² K.
  • Expected service life: Over 25 years.

Fire resistance:

Testing classification based on:

  • BS 476-6: 1989 and A1:2009 (Fire propagation).
  • BS 476-7 (Surface spread of flame).
  • Class 0 fire rating in accordance with Building Regulation (E&W) Approved Document B.

The polyurethane foam also meets the following British Standards:

  • BS 5852 Ignition source crib 7.
  • BS 6853 Annex B.2 Toxic fume.
  • BS 853 Smoke density (3 metre cube test).