If you are considering to add more insulation to your homeplace, you might be surprised to find out that the old insulation still exists. This might lead to questions like, “Do I need to remove the existing insulation before installing the new insulation?” The short answer to the question is, no. According to the Energy Star, it is stated clearly that you can put new insulation over old insulation. But, unless it’s wet. In almost all circumstances, you should be able to install new insulation on top of the existing insulation.
Rolled, Batt or loose-fill insulation can be installed on top of old insulation without any problem. However, foam insulation may need to be replaced because it can settle after a year. It is okay for you to understand that there are no chemical interactions by mixing padding. This means that you and your family are safe. In fact, adding new insulation on top of old insulation will offer a better R-value and save you money.
Important notes to keep in mind
- Rolled or batt insulation can be installed on top of existing insulation.
- Faced insulation should not be installed on top of old insulation in the attic.
- In no circumstances should rolled insulation be tacked down. Why? The R-value could reduce if the insulation is flattened or squashed.
- It is highly recommended to air seal before installing new insulation. It is because air leakage can hinder the performance of insulation.
- The insulation should be rolled out perpendicular to the joints.
Circumstances to remove Old insulation
Although the old insulation does not need to be removed, there are a few instances where you need to do away with it.
- If the existing insulation had been exposed to high-level moisture or is wet, wet insulation is problematic. In this case, you will need to eradicate it. Molds will likely spread. Old insulation removal will be necessary if molds exist.
- If rodents have infested the existing insulation, they are likely to have left droppings or other unwelcome messes. The insulation will need to be removed and replaced.
If adding new insulation to the existing insulation makes more sense to you, contact s professional to recommend the right of insulation. Insulation removal is time-consuming and expensive. Thus, it is essential to understand the unavoidable circumstances of its eradication.
A poorly insulated attic means an energy-inefficient home place. It is a big yes that you can add new insulation over old insulation – as long as it is not wet.
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