PU FOAM INSULATION
SPRAY TYPE (SPF)
Spraying PU foam under the roof / on the roof
Sprayed PU foam insulation is
Spray foam under roof or spray polyurethane foam insulation, also known as pu foam insulation, also abbreviated as SPF (spray polyurethane foam). This material has been used in construction to reduce heat for many years. Polyurethane foam offers both open cell and closed cell insulation properties with low thermal conductivity coefficent. The foaming is produced by a high pressure spray process. When the two materials interact, the effect is white foam along the spray line. There are 2 types of foam as mentioned above.
1. Open cell polyurethane foam, designed to contain large molecules and open the surface to be exposed to moisture in the air. Can exchange or allow air to circulate, no opacity, not waterproof For internal use only Cannot be used in waterproofing or waterproof works because of its water-absorbing properties.
2 closed cell polyurethrane foam It has a molecular nature that closes when ejected. It has a density of 30-60kg/m3f, which is the type used in Phraelan in Thailand and almost all of them are like this. The inside of the foam retains gas for better heat resistance.
Purpose of repair
To stop water leaking from outside into the water tank.
To stop water seeping from the water tank outside.
To extend the life of the water tank to increase its lifespan.
Reduce the risk of not having water available due to leaks.
Reduce the problem of paying excessively high water bills.
Reduce the problem of not having water to use due to water storage tanks losing condition.
How to stop water leaking from outside the water storage tank
When we discovered a water leak on the outside wall of the water tank. Stopping water leaks involves injecting a pressurized solution into the area where the leak occurs. It's called the polyurethan foam injection method, which involves compressing water-stopping substances produced from polyurethane substances. When in contact with water, it expands into water-stopping foam. There are many types and grades. The more cheap the grade. They are often not durable and deteriorate quickly. Causing water to leak in again. Foam shooting is a method that requires an experienced repairman to do the job. Normal people cannot repair it themselves. We break down the general repair steps as follows:
Extract the skin to check for leaks. This method aims to open the surface and use it to pump liquid to seal the leak.
Drill holes and install the packer gun head.
Inject polyurethane liquid into the firing head.
Remove the firing head and cover the surface with quick-drying waterproof cement.
Take off the installation head and putty the work neatly.
You should do another step of protection coating if you want it to be more durable.
LOW THERMAL CONDUCTIVITY
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Properties of SPF (spray polyurethane foam.
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It has excellent thermal insulation properties.
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SPF is the lowest thermal insulation in comparison with other materials.
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When installing the foam, there will be no joints because it is sprayed homogeneously.
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Excellent adhesion to roofing materials such as metal sheet roofs
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No moisture or water absorption in the air
