Injected Polyurethane Insulation

Technitherm® Cavity Wall Stabilisation and Insulation System

Non-Standard Cavities - Stone


Technitherm® cavity wall stabilisation and insulation system is Isothane’s injected polyurethane foam product and has a 25 year track record of providing insulation and stabilisation to properties across the British Isles. Its closed cell properties mean that it is suitable for many different types of domestic and commercial properties including some previously thought to be unsuitable for cavity wall insulation







It holds a KIWA BDA Agrement Certificate, number BAW-18-037-S-A-UK and LABC certification, EWWS598 and is only installed by our approved network of installers who together with our technical team can help you with your projects across the country.

LABC Technitherm



Technitherm® is suitable for

  • Stone properties including those with random cavities
  • Properties with failed or missing wall-ties
  • High rise buildings
  • Properties with no damp proof courses
  • Cavities below 50mm
  • Properties located in exposure to wind driven rain areas or that are prone to flooding
  • Variable cavities

It is the only product to pass both the BRE (British Research Establishment) Flood Resilience Test and to meet their requirements for use in walls with defective or missing damp proof courses.

Benefits or Uses

Technitherm® has a huge number of benefits for owners of all types of properties.

  • Keeps your home warmer so heating bills are lower.
  • Reduces draughts making your property feel more comfortable.
  • Suitable for most types of hard to treat homes with cavity walls.
  • Is installed externally in most instances causing minimal disruption to the property owners.
  • Solves penetrating damp problems.
  • Protects against wind driven rain.
  • Provides flood resilience protection.
  • Reduces condensation and mould growth on the insides of external walls.
  • Non-absorbent so will not cause damp.
  • Gives structural stability to properties where there are missing or failed wall-ties through its ability to adhere inner and outer leaves of properties together.
  • Suitable for insulating uneven width cavities.
  • Improves the energy efficiency rating of the property.

IMG_0852 Cavity Wall Foam Cavity Wall Foam Technitherm


Technical Data

Technitherm® is a CFC and HCFC FREE dual component polyurethane foam which complies with the requirements of BS 7457:1994 for the stabilisation and thermal insulation of masonry cavity walls.

Technitherm® is used for the stabilisation of masonry cavity walls by strongly adhering the inner and outer leaves together and as such is a convenient and cost effective alternative to metal cavity wall tie replacement.

Its excellent thermal insulation properties means improved U-values are achieved. For a standard construction 65 mm cavity U-values of 0.33 Wm²K are achieved and in a 100mm standard construction cavity the U-value is 0.22 Wm²K.





Cavity Wall Insulation

Our cavity wall foam is a KIWA approved product providing structural stabilisation and thermal insulation.


Thermal Insulation

Isothane has a range of insulation products designed to meet your insulation needs in all types of buildings.


Case Studies

Vaiable Width Cavities Variable width cavities needing insulating

The Client Resident of Ford & Etal Estates, Ford Village, Berwick upon Tweed The Problem These early 1960’s stone built...


Cavity Insulation and Stabilisation in High Rise Buildings

the client Rochdale Boroughwide Housing ‐ College Bank Apartments the problem 7 apartment blocks, built in the 60’s,with no cavity...


Cavity Wall Insulation and Wall Tie Replacement

The client Homeowner in Fence Burnley the problem A part stone built house suffering excessive heat loss, high heating bills,...


Non-standard cavities - flood risk Flood Resilience For Caribou And Rochdale Council

The client Carribou, professionals in making properties cosier and more energy efficient working on behalf of Rochdale council. The problem...


storm Flood Resilience in the Wake of Storm Eva and Desmond- Croston

The client A private homeowner in Croston Lancashire who had been affected by storm Eva and Desmond this winter. The...


Technitherm Walthamstow Insulation and Structural Stability in Walthamstow

The CLIENT London Borough of Walthamstow – Priory Court Estate The problem An unusual construction using a combination of hollow...


Non-standard cavities - stone Stone Properties Cavity Wall Insulation

The client Blackburn with Darwen Council The problem A wide variety of houses built in the early 1900’s with variable...


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