What Is Condensation?
Air is a mixture of gases. There is always vapour in the air, and there is more of it when the temperature is high. When the vapour meets a cold surface it condenses into water: Condensation always occurs when the surface temperature is down to and below the so-called dew point.
In buildings with a single skin roof system condensation occurs during the quick changes in weather. The surface temperature of a steel roof may, due to rain or heat radiation during the night, fall as much as 5° below the inside temperature.
The problems caused by condensation can easily be prevented by Grafo-Therm anti-condensation coating.
Long-term benefits..
Professionally installed by One Seal Coatings, Grafo-Therm is THE VERY BEST long-term solution to condensation.
The very best anti-Condensation coating..
Condensation costs businesses millions of pounds each year through damage to goods, litigation, and premature corrosion of fixings and purlins.
All steel and aluminum single-skin roofs, including built-up insulated systems with a ventilated air gap, have the capacity to condense and drip.
One Seal Coatings, as an accredited applicator of Grafo-Therm, has the knowledge and experience in the prevention of condensation.
Grafo-Therm Prevents dripping whenever a surface is subjected to condensing moisture.
Grafo-Therm Incorporates a very effective fungicide.
Grafo-Therm Absorbs moisture which may collect despite the insulation.
Grafo-Therm Prevents damage from condensation.
THE GRAFO-THERM TREATMENT. HOW DOES IT WORK
In the dry state, Grafo-Therm is an efficient thermal insulant, albeit a 1.5mm thickness would not be efficient against heat loss, it does put back the time before dew point occurs, thereby preventing or considerably reducing the periods during which condensation forms. Thereby reducing the amount of condensation formed during any one 24-hour period.
Whenever the dew point is reached on the surface coated, condensation will form and this will immediately be absorbed by the coating.
A 1.5mm thickness can absorb and control dripping up to 1.0 liters of moisture per m2.
Having absorbed moisture it is most important to effect rapid evaporation and removal from the cavity, when conditions change to drying.
For this Grafo-Therm is superb, for example, when sprayed onto a 1000m2 corrugated roof the textured finish of the compound effectively increases the specific drying surface by at least 10 times = 10,000m2, on most corrugated sheets this can be increased by 20% to allow for the corrugations - 12,000m2 of drying surface.
Grafo-Therm having proven absorption and capillary capabilities assures maximum benefit from this large specific drying surface, enabling fast and efficient cyclic drying.
The release properties of Grafo-Therm are faster per thickness and area than competitive materials which rely on greater thickness being applied.
CORROSION PROTECTION
Grafo-Therm provides indirect protection against corrosion by absorbing moisture, that might otherwise form droplets to run over an untreated surface, setting up conditions for corrosion.
On an untreated surface, droplets can contain a large amount of water with a small surface area, onto which a surface film will form to inhibit evaporation when conditions change to drying.
A Grafo-Therm coated surface has a very large specific surface which enables water to evaporate quickly, thereby reducing the time in which water could affect the painted surface
TECHNICAL INFORMATION
Absorption capacity For 1.5 mm thick layer approx. 1.0 Litg/sq met
Dry contents volume 96%
Density Approx 1
Recommended application Sprayed on by trained applicators
Drying time at 20° 55% humidity, 1.5 mm Completely dry in approx 10 hours
Surface finish Textured
Dilutant Water
Standard of colour Water White or Grey. Can be tinted with water-based color pigments.
Fire Classification Fireproof tested in Germany, Sweden, the UK and the USA
Precautions Non Toxic
FIRE RESISTANT
Grafo-Therm conforms with class I surface spread of fame B$476 Part 7, fire propagation B$476 Part 5 - Yarsley Technical Center, June 1978
With Fire Propagation sub-index of 1 of 3.21 and final index of 5.2P, Grafo-Therm easily conforms with class O restrictions of the spread of flame UK building regulation 1976 Section E15 (1)(E)
United States fire tests - ASTM E84-80 Rating 5-0-5
One Seal Coatings - Trusted in the application of Grafo Therm
Grafo-Therm has been used by the M.O.D., Local Authorities, and H.M.Prisons, for over 25 years with total success, on such buildings as The Trident Submarine Pens, Schools, Domestic Garages, Outhouses, Sports Halls, Prisons, Oversheeting of Blocks of Flats, Aircraft Hangers, Storage Buildings, etc.