About Intumescent Paint for Wood Derivatives & Timber
Intumescent paints for timber and wood derivatives are available in Water and Solvent based forms with fire ratings of 30, 60 minutes, British Class 0/1 and European Class B/C. Utilising thin film intumescent technology the paints are able to give a highly decorative finish for use internally and Externally. On External wooden cladding, we recommend that an impregnation flame retardant is used in place of an intumescent paint.
Intumescent and flame retardant products come in 3 forms:
– Pigmented paints – 30 to 60 minutes rating, Class 0 and Euroclass B
– Clear Varnishes – 30 to 60 minutes rating, Class 0 and Euroclass B
– Clear impregnation treatments – Class 0 and Euroclass B
How Does An Intumescent Paint Protect Wood And Why Is It Needed?
Intumescent Wood paints are what we refer to as “Reactive Paints”. When the paint is subjected to heat it will react. In the case of an intumescent paint when subjected to temperatures exceeding 120°C the paint will intumesce (Swell up to 50 times the thickness of the paint) and form an carbon layer (Char) which thermally insulates the timber substrate slowing down the timber Char rate and increasing the burn through time to 30 or 60 minutes. We offer products to fire protect timber cladding on building which require a Class 0/1 surface spread of flame, these products are used slow down the spread of fire in a building which aids peoples escape. In a fire it is critical that the structural timber frame and cladding internally and externally of the building is protected correctly so that the timbers do not burn/char away leading to premature failure.
In Summary, Intumescent timber paint thermally insulates structural and NON structural timber in a fire, slowing down the spread of fire and stopping premature collapse of the building.
For details regarding our paints finishes, listings, approvals and compliance, please get in touch, or contact our free estimating department on 0800 0277 955
Fire Certification and Test Standards
All of our products that we sell are fire tested to British and or European standards, Intumescent paint for Timber use the following standards:
– European Union: EN 113823 B,s1,d0
– European Union: EN 111925-2 SBI
– United Kingdom: BS 476-20/22 30 and 60 minute fire rating
– United Kingdom: BS 476-6/7 Surface spread of flame Class 0/1
Specification and Estimations for Intumescent Paint and Its Application
Intumescent paints are the most common form of fire protection to timber, this is because of how widely available the products are and how cheap they are. At International Passive Fire Ltd we have a whole department set up to deal with Specifications and Estimations for Intumescent timber Paint. Our technical specification and estimating department consists of over 50 years of experience in the structural passive fire protection field and is completely independent of all manufacturers. Also, all of our work is free of charge (FOA).
We aim to give all customers whether big or small the same high value service and back up to ensure that all jobs are completed and certified on time. We can help you when applying intumescent paint to wood to ensure the process is smooth and easy and to guarantee that the paint will give the correct fire protection required.
Application of Intumescent Paints for Wood
Application of Intumescent paints for wood is very easy. You can apply the paint using a brush or spray machine. Typically brush application is up to 125 microns per coat and spray is 250 microns per coat depending upon the products. It is important that drying times are adhered to before application of the second or third coat to ensure the paint will protect the steel.
During application a Wet Film Gauge is used to measure the thickness of each coat of paint. These gauges are supplied free of charge to all of our customers.
Do I Need A Topcoat?
The topcoat of an intumescent paint system is solely used to protect the intumescent coating from the environment that it is in or as a decorative finish coat that can be coloured to most RAL or BS colour codes upon request. The finish of these top coats is usually MATT or SATIN however we have several products that finish in GLOSS. Not all jobs require a topcoat however if the steel is external or internal in a high moisture environment, then YES you will need a topcoat.
Before buying any intumescent paint for steel you must make sure that a full specification has been undertaken listing all structural steel that need to be protected.
About International Passive Fire Ltd
With over 50 years of experience in the passive fire protection industry, International Passive Fire Ltd provides independent estimating services for all intumescent coatings/paints for timber and wood derivatives.
Call our technical department free on 0800 0277 955 to discuss our free estimating and specification services.