Please note that this product CANNOT be used without first receiving a specification from our Technical Department for your project. Please download and complete the 'Thermoguard Door Enquiry Form' and return by email to [email protected].

If you have any questions regarding this process consult our technical department on 0113 2455450 (option 2).

The below information from the manufacturer must be read and referred to your relevant authority for approval BEFORE purchase and use.

Upgrading Doors to 30 Minutes Fire Resistance with Thermoguard Timbercoat Intumescent Paint

Most modern normal internal doors cannot be upgraded to achieve 30 minutes Fire Resistance. Issues include them often being hollow core, can be very thin, lightweight and are liable to warping shortly after installation. No door answering such a description can be upgraded and should be replaced with a new Fire Door where one is required. Thermoguard recommend that both sides of the door are protected and are unable to supply certification unless sufficient product is purchased and applied to both sides of the door.

While Thermoguard recommend the installation of custom built fire doors there can be reasons not to do so. Doors that Thermoguard Timbercoat is capable of upgrading are ones that can afford to lose 2mm to charring.

1. Solid, joint free doors with compressed core and a reasonable thickness (6mm+), veneer faces bonded to either side of the core. These can be flush doors or pressed to create a moulded look.
2. Seasoned, old or sturdy doors with 35mm+ thick frames and solid panels 10mm+ thick.
3. Certain other doors that are not prone to premature collapse.

Note: Well seasoned or old, sturdy doors with panels 8mm thick can be upgraded if additional “sacrificial” ply panels 6mm thick are fitted in the panel recesses and held in place by the door’s beading.

If your doors are in a category which could be upgraded submit your assessment to your Authority, along with Thermoguards explanatory Technical Note (available to download HERE) for approval prior to purchase. Thermoguard UK will issue a Fire Certificate for Authority approved projects following completion.

Please note: Intumescent paint is just one element of protection and DOES NOT create a ‘fire door’. Doors should only be considered for upgrade when the historic integrity of the door must be maintained, evaluation of ironmongery and gaps around the door should be undertaken and then all works should be carried out by a specialist to meet the requirements of your authority. 

Justification

As doors vary so greatly and the great majority are unsuitable for upgrading it is neither meaningful or realistic to carry out an official NAMAS / UKAS Fire Door Fire Test. Thermoguard Timbercoat’s uniquely effective formula resulted in the UK’s only successful official UKAS / NAMAS Fire Test Laboratory Fire Resistance Test to 60 minutes on softwood with timber lost to charring restricted to 7-10mm at 60 minutes (unprotected softwood charring is approximately 50mm).

The system was also demonstrated by the Megastructures TV documentary “Building from Disaster” restricting charring to 2mm and retaining integrity and insulation throughout a 45 minute maximum severity burn (more severe than BS 476 part 22). This was while identical unprotected panels burnt in parallel were shown to burn through completely within 6 minutes.

In a recent UKAS / EGOLF Fire Test Laboratory 30 minute Fire Resistance test, Thermoguard Timbercoat applied 15% thinner than the 60 minute Fire Test or our specification below restricted loss to charring to 3mm on softwood and 2mm on MDF.

Thermoguard Technical Department assess doors as suitable based upon the customers description which features on the Fire Certificate issued, so this information should be checked before ordering.

We require that in a fire the door be capable of losing 2mm plus 2mm additional safety factor to charring without the risk of splitting or cracking of the thinnest areas (usually the panels) or other premature failure, while maintaining insulation.

Please always refer to the downloadable PDF's from the "Data Sheets" tab for more information on:

• Technical Data
• Suitable Surfaces and Substrates
• Substrate Preparation
• Application Instructions
• Suitable Primers/Topcoats (where applicable)
• Drying Times
• Application Equipment
• Health & Safety Information
• Warranty

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.