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Why Choose External Wall Insulation?
Most properties built before 1930 were constructed with solid walls, so there are no voids into which insulation can be injected. These properties made with solid walls can be insulated with external insulation. In this case, the purpose of insulation is to slow down the heat flow through the walls, which significantly reduces the need for heating.
Insulation of external walls is expensive but effective. Adding it as part of a larger design can reduce costs and does not have to be done for the entire home; an attractive front view may be better suited for indoor insulation, whereas less attractive side and back views can be insulated from the outside. Even with a higher cost, it is difficult to ignore the advantages of external insulation compared to internal insulation.
Approved external wall insulation services can reduce heat loss by up to 40%. This means that you may save money on lower heating costs, but the external insulation system also pays for a solid wall in just a few years!
Exterior Wall Insulation Materials
There are many types of insulation that can be used for outside of the home, including foam, mineral wool, phenolic resin (k5), wood fiber, and even cork. Foamed polystyrene (known as EPS) is certainly the most popular choice because it is the cheapest option for the job. Phenolic resin (K5 boards) is used when space is limited because less of this type of insulation can be used to reach the required U value.
Mineral wool can also be used to insulate solid walls; some choose it because it offers not only an open steam system but also a great silencing effect. On the other hand, it is very important that acrylic plaster is not used to complete the project because it is not breathable.
You can use wood fiber if you want the most breathable and natural insulation. However, the system itself is very expensive compared to the EPS system.
At BrandXXX, our insulation offers a number of benefits that go beyond the thermal power of external walls, such as first-class fire resistance, exceptional noise reduction, hydrophobicity, vapor permeability, and dimensional stability of the building.
BrandXXX offers a range of products and solutions for external wall systems, such as rain protection, recess walls, continuous external insulation, curtain walls, as well as wooden and metal frame structures. The goal is to design buildings that will be able to withstand ageing, leaks, and poor construction by promoting drying mechanisms or ensuring that the drying potential is greater than the wetting potential of the enclosure. As heat loss slowly disappears as the demand for continuous external insulation increases, the requirements for vapor barriers in the UK’s cold climates also disappear.
Only time can tell. However, you can reduce these costs by combining work with other construction or decorative projects. For example, if you choose external insulation, you need scaffolding; however, if you combine an external insulation design with roof work or paint a wooden exterior cladding, you can spread the scaffolding costs over both projects. If the outer walls of the house need repair or repainting, you can combine it with the outer insulation of the house and reduce costs.
External Wall Insulation Must Comply with Building Codes
If solid wall insulation is attached to the outer walls of the house, it must comply with building codes. In this case, this refers to the thermal power of the insulation; full wall insulation must reach a U value of 0.30 watts / m2k. In the case of expanded polystyrene, this means that at least 90 mm insulation should be used. Of course, the thicker the material, the better the insulation performance.
- If 25% or more of a wall is to be insulated from the outside, according to the building regulations, the entire wall usually has to be brought up to date.
- An approved thermal insulation service for exterior walls can reduce heat loss by up to 40%. This means that you not only save money for lower heating costs, but the external insulation system pays for a solid wall in just a few years!
- It was found that the total heat flow through typical wall assemblies due to thermal bridges is underestimated by up to 70%.
- However, it has been shown that adding thermal insulation to walls does not necessarily reduce a building’s energy consumption.
- These thermal bridges have been shown to reduce insulation effectiveness (R-value) by up to 50% in conventional steel post wall assemblies, resulting in wall assemblies and interface details that do not meet current energy code requirements for a minimum U-value.
- In a typical building, about 40% of the energy required to heat or cool a room is lost due to poorly insulated exterior walls.
- The high-purity graphite particles integrated in the insulation beads reflect radiant heat and significantly improve the insulation capacity.
- They offer up to 20% higher R-value than conventional white EPS of the same thickness. It can actually be 50% more effective than other common insulation materials.