Global warming is a serious threat for mankind, especially in areas where basic facilities are unavailable. The change in the balance of nature is causing abruptness in global weather, heat-related illnesses, flooding, and more. With regards to rising temperatures, homeowners and businessmen manage their residences and commercial structures with heat-proofing materials and chemicals.
Heat-proofing materials and chemicals prevent heat transfer (conduction, convention, and radiation) from roofs, walls, and windows, keeping the indoor temperature of the building constant. In addition, the energy consumption and air-conditioning cost also reduces. Statistically, 60% of heat losses occur from roofs and walls. Ensure that the areas are well-covered.
Roof Heat Proofing Products
There are two types of insulation materials: natural and man-made. These products inhibit heat transfer through different characteristics like surface roughness, air pockets, and contact area. Following are some materials used for roof heat proofing:
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Wood Fibre
The use of wood fibre insulation is an environmental-friendly approach towards a greener tomorrow. It can insulate timber frames, flooring, roofs, studs, and rafters. Wood is renewable; it sequesters carbon during growth and is free from pollution. It is perfect for hot summer days due to its breathability and material density.
Properties
Thermal conductivity: 0.038 – 0.043 W/m.K
Density: 50 kg/m3
Thermal capacity: 2100 J/kgK
Composition: Ammonium phosphate, polyamide, and wood fibres
Vapor permeable: Yes
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Cellulose
Cellulose is made from recycled paper. Scientifically, it is a carbohydrate consisting of glucose units. To create a strong insulation, the shredded periodical is mixed with inorganic salts, such as boric acid to enhance its properties, such as fire, insects, mould, and vermin resistance. Depending upon the application, the installation is blown or damp-sprayed.
Properties
Thermal conductivity: 0.035 – 0.040 W/m.K
Thermal resistance: 2.632
Specific Heat Capacity: 2020 J/Kg. K
Embodied Energy: 0.45 MJ/kg
Vapor permeable: Yes
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Wool
One of the best materials to insulate the indoors and improve air quality is wool. It comes in ropes or batts with different lengths and thicknesses. Most companies provide custom sizes too. Wool has various advantages: It can adsorb and absorb 65% humidity, suppress mildew and mold, and absorb sound.
Sheep wool insulation is treated with borax to improve pest and fire-resistant qualities. The percentage of borax is kept low (4%) because of its toxicity effects.
Properties
Thermal conductivity: 0.038 W/m.K
Thermal resistance at 100mm: 2.63 K/m2/W
Specific Heat Capacity: 1800 J/(kg.K)
Density: 23 kg/m3
Embodied Energy: 6 MJ/kg
Vapor permeable: Yes
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Hemp
If you are an environmental-friendly individual who wants to play an active role in reducing global CO2 emissions, use hemp for insulation purposes. Hemp wool comes from the hemp plant, which is easy to cultivate and can grow on every soil. Hemp for heat insulation is composed of 85% hemp fibre with 3-5% soda and polyester binding.
Properties
Thermal conductivity: 0.039 – 0.040 W/m.K
Thermal resistance at 100mm: 2.5 K.m2/W
Specific heat capacity: 1800-2300 J/(kg.K)
Embodied energy: 10 MJ/kg
Vapor permeable: Yes
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Hempcrete
Possessing high heat inertia, hempcrete blocks prevents overheating in summers and renders excellent toughness over time. It is a mixture of lime, including sand and cement and hemp hurds. Hempcrete acts as a moisture regulator. Furthermore, it does not need expansion joints.
Properties
Thermal conductivity: 0.06 W/m.K
Thermal resistance at 100mm: 1.429 K.m2/W
Specific heat capacity: 1500 – 1700 J/kg. K
Vapor permeable: Yes
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Cellular Glass
Cellular glass insulation is a lightweight, carbon-building material used in the construction industry. It is manufactured from recycled glass and materials, such as sand. The ingredients are melted into molten glass and converted into a fine powder, which is heated in molds. Carbon-black is added to produce carbon dioxide for a spacious structure.
Thermal conductivity: 0.041 W/m.K
Specific heat capacity: 1000 J/(kg.K)
Density: 115 kg/m3
Vapor permeable: No
Roof Heat Proofing Chemicals
Like materials, roof heat proofing chemicals are also vital in maintaining indoor temperatures. The decrease in roof temperature has a strong influence on the residents or employees. Some of the most important chemicals for roof heat proofing are:
- Ammonium Sulphate
- Boric Acid
- Calcium Chloride
- Calcium Hypochlorite
- Defluorinated Phosphate
Conclusion
The use of heat proofing materials depends on the amount of energy transfer needed in a closed structure. For example, if the weather is hot and dry, wood fibre or hemp can be used. Likewise, in colder conditions, liquid roof heat proofing is a better option. To know more, contact experts from Waterproofing.pk today!
