{"id":28044,"date":"2026-04-09T16:06:00","date_gmt":"2026-04-09T14:06:00","guid":{"rendered":"https:\/\/www.alfaflor.com\/?p=28044"},"modified":"2026-06-10T15:26:20","modified_gmt":"2026-06-10T13:26:20","slug":"everything-you-need-to-know-about-fire-retardant-durability-and-french-m1-fire-rating-validity","status":"publish","type":"post","link":"https:\/\/www.alfaflor.com\/en\/everything-you-need-to-know-about-fire-retardant-durability-and-french-m1-fire-rating-validity\/","title":{"rendered":"Everything you need to know about the durability of a fire-retardant treatment and its M1 classification"},"content":{"rendered":"

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Durability of an M1 fire-retardant treatment: validity and long-term monitoring<\/h2>\n
The question of how long a fire-retardant treatment lasts often arises when a material has already been treated and is still in use in a public building, an exhibition stand, a hall, an exhibition space or an interior fit-out. A substrate may have been properly fire-retardant treated initially, but may change over time due to use, moisture, friction or simply natural ageing. <\/p>\n
At Alfaflor, an M1 fire-retardant treatment should not, as a matter of principle, be regarded as permanent. Its initial effectiveness depends on the substrate, the correct dosage, the method of application and the conditions under which the material is stored. Over time, regular monitoring is required to ensure that the treatment remains suitable for the substrate\u2019s intended use. <\/p>\n
Depending on the type of material, this may be a wood fire retardant, a fabric treatment or another solution suitable for the material in question.<\/p>\n
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Key points<\/h2>\n
\n
No M1 fire-retardant treatment should be regarded as permanent without regular monitoring over time.<\/li>\n
Effectiveness may be reduced by water, moisture, friction, abrasion or washing.<\/li>\n
Adherence to the initial dosage has a direct impact on long-term treatment compliance.<\/li>\n
It is still advisable to check the substrate regularly, particularly in areas subject to wear and tear or frequent handling.<\/li>\n
The fire safety compliance report and the certificate of compliance must be kept on file.<\/li>\n
A substrate that is damaged or inadequately protected may need to be re-treated.<\/li>\n<\/ul>\n<\/div>\n
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Correct application \u2192 Use of the material \u2192 Natural ageing \u2192 Regular inspection<\/p>\n<\/div>\n
Why does an M1 fire-retardant treatment change over time?<\/h2>\n
Flame-retardant treatments work by altering the fire behaviour of the treated material. In many cases, this is achieved by impregnating the fibres or by incorporating active agents into the material or onto its surface. As long as these agents remain in place under the right conditions, the protection remains effective. <\/p>\n
Over time, however, a number of factors can come into play: exposure to air, dust accumulation, ambient humidity, repeated friction, light, handling, cleaning or washing. Even without any sudden visible changes, the material may gradually lose some of its original effectiveness. <\/p>\n
For this reason, fire-retardant treatment should be viewed as an ongoing process, rather than a one-off measure with no subsequent monitoring.<\/p>\n
What compliance documents really mean<\/h2>\n
When a material is processed, two types of document are particularly important for tracking the file: the fire classification report and the certificate of compliance, where applicable.<\/p>\n
The fire investigation report<\/h3>\n
The test report certifies the system\u2019s performance under the conditions specified during the tests. It serves as evidence of the product\u2019s ability to help limit the spread of fire on the material in question. <\/p>\n
Certificate of compliance<\/h3>\n
This document serves to bridge the gap between theory and practical application. It confirms that the product has been correctly applied to the relevant surface in accordance with the specified conditions. In many cases, it serves as a useful document for presenting a clear case during an inspection. <\/p>\n
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Important note: a fire resistance classification document does not eliminate the need for ongoing monitoring. It confirms the system\u2019s initial performance, but does not replace the need to monitor the actual condition of the substrate over time. <\/p>\n<\/div>\n
What factors can reduce the durability of a fire-retardant treatment?<\/h2>\n
The duration of a treatment\u2019s effectiveness depends heavily on the material\u2019s environment. The more the substrate is subjected to stress, handled or exposed to external factors, the greater the risk of the treatment deteriorating. <\/p>\n
\n\n\n\n\n\n\n\n\n\n
Factor<\/th>\n Possible effect on treatment<\/th>\n Consequence to monitor<\/th>\n<\/tr>\n<\/thead>\n
Water and moisture<\/td>\n Leaching or migration of active ingredients<\/td>\n Gradual reduction in effectiveness on certain surfaces<\/td>\n<\/tr>\n
Abrasion and friction<\/td>\n Surface wear or deterioration of the finish<\/td>\n High-traffic areas or corners that are more susceptible to wear<\/td>\n<\/tr>\n
Textile washing<\/td>\n Removal of some of the impregnation<\/td>\n Loss of performance in treated fabrics<\/td>\n<\/tr>\n
Dust and grime<\/td>\n Accelerated surface ageing<\/td>\n More difficult to inspect visually<\/td>\n<\/tr>\n
Initial underdosing<\/td>\n Insufficient active ingredient from the outset<\/td>\n Reduced duration of protection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
For textile substrates, you may also wish to view our range of products for fabrics<\/a> and paper.<\/p>\n
The initial dosage has a direct impact on long-term performance<\/h2>\n
The durability of a fire-retardant treatment does not depend solely on the material\u2019s environment. It also depends on the quality of the initial application. A substrate that has been properly prepared and treated with the correct dosage will have a more stable base than one that has been under-treated. <\/p>\n
Under-application is not always immediately apparent, but it can reduce the amount of active ingredients present in the substrate. Conversely, controlled application helps to ensure the material performs reliably over time. <\/p>\n
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Wood: approximately 1 litre per 6 m\u00b2, depending on the system in question<\/li>\n
Cardboard \/ paper: approximately 1 litre per 4 m\u00b2, depending on the surface<\/li>\n
Textiles: adjust the dosage according to the weight and type of fabric<\/li>\n<\/ul>\n
For wooden substrates, see: fire-retardant solutions for wood.<\/a><\/p>\n
How can you check the condition of a surface that has already been treated?<\/h2>\n
Once a material has been in place for some time, a visual and practical inspection can help to assess whether the treatment remains appropriate for the substrate\u2019s intended use. Whilst this inspection does not replace a full technical analysis, it serves as a useful first line of defence. <\/p>\n
It is often recommended to carry out a periodic inspection every 2 to 3 years, particularly on surfaces subject to wear and tear, movement or regular maintenance.<\/p>\n
Example of a simple sample test<\/h3>\n
\n
Take a small sample if possible without disturbing the installation.<\/li>\n
Briefly hold it over a flame for a few seconds, taking care to do so safely.<\/li>\n
Observe the material\u2019s reaction: whether the flame goes out, spreads, or remains lit.<\/li>\n<\/ol>\n
If the observed reaction no longer corresponds to the expected behaviour, reprocessing or further investigation may be necessary.<\/p>\n
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Handy tip: make a note of the date of treatment, the product used, the surface treated and the checks carried out. This simple record-keeping helps you manage maintenance more effectively over time. <\/p>\n<\/div>\n
Which media require the most vigilance?<\/h2>\n
Not all materials age in the same way. Some substrates retain their finish more easily than others, whilst certain environments accelerate the need for maintenance. <\/p>\n
\n\n\n\n\n\n\n\n\n
Support<\/th>\n Sensitivity over time<\/th>\n Useful checkpoint<\/th>\n<\/tr>\n<\/thead>\n
Interior wood<\/td>\n Moderate, depending on use<\/td>\n Wear and tear, surface changes, moisture<\/td>\n<\/tr>\n
Decorative textiles<\/td>\n More resistant to washing and handling<\/td>\n Cleaning, folding, rubbing, changes in appearance<\/td>\n<\/tr>\n
Paper and cardboard<\/td>\n Varies depending on storage conditions and humidity<\/td>\n Deformation, moisture, surface wear<\/td>\n<\/tr>\n
High-traffic areas<\/td>\n High<\/td>\n Abrasion, impact, frequent cleaning<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
Tips for making a fire-retardant treatment last longer<\/h2>\n
There is no one-size-fits-all approach that works for all materials, but there are certain best practices that help to maintain the quality of the finish over time.<\/p>\n
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Avoid exposing materials that are not designed for this purpose to water or moisture<\/li>\n
Minimise repeated rubbing on treated surfaces<\/li>\n
Do not cover a surface that has been treated with a product that is not intended for this purpose or is incompatible<\/li>\n
Check high-traffic areas, corners and frequently handled parts regularly<\/li>\n
Keep a written record of the applications, touch-ups and checks carried out<\/li>\n<\/ul>\n
If your project requires large-scale processing or more structured support, you may wish to look into the processing service <\/a>offered by Alfaflor.<\/p>\n
When should retreatment be considered?<\/h2>\n
Retreatment may be considered where the substrate has suffered visible wear and tear, has been washed, altered or repeatedly exposed to moisture, or where its behaviour no longer corresponds to that expected during an inspection.<\/p>\n
This is also something to bear in mind when the material has been in storage for a long time, moved several times, or brought back into service after a long period without inspection.<\/p>\n
In the case of wooden surfaces, it may be worth comparing the available options\u2014fire-r etardant impregnation <\/a>and intumescent varnish<\/a>\u2014depending on the specific surface in question.<\/p>\n
In summary<\/h2>\n
The durability of an M1 fire-retardant treatment depends as much on the product itself as on the substrate, the dosage applied and the conditions under which the material is used. Natural ageing, moisture, friction, washing or abrasion can gradually reduce the treatment\u2019s effectiveness. <\/p>\n
Effective maintenance is based on a few simple principles: keeping the right records, regularly checking the condition of the surfaces, applying products in the correct quantities, and considering re-treatment as soon as the material shows signs of wear or deterioration.<\/p>\n
For further information, visit the Alfaflor website to explore our wood solutions, products for fabrics and paper, and our range of intumescent varnishes.<\/p>\n<\/div>\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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