What do you mean by foam board insulation and what does the R-value signify?
The foam board insulation has emerged as a great alternative for the usually used fiberglass batt insulation panels. This is so because the rigid foam insulation boards R-value per length of thickness is better as compared to other insulations that are generally used in most places. Also, they are much cheaper. Apart from this, they offer great ease of work and great moisture resistance.
The rigid foam insulation board R-value is an important factor as it is the measure of the resistance that the insulation offers to the flow of heat across the insulation panel or board. Hence the better r-value of the foam insulation is also one of the major factors of its growing demand.
What types of foam insulation boards are available?
There are majorly 3 types of foam insulations available. They are-
1.Expanded polystyrene (EPS), which has the r-value of 4 per length of thickness and is the cheapest of all types. It is useful for insulating the roofs, foundation walls, and the sidings.
2.Extruded polystyrene, which has an r value of 5 per length of thickness. It is capable of limiting the air movement due to its groove and straight edgy structure. It is mainly used in foundation bases and can be found in various sizes.
3.Polyisocyanurate (Polyiso), which has an r value of 6 per length of the thickness. It is denser and costlier than other types. It is capable of reflecting back the heat due to its foil faced structure. It is beneficial to be used in the attic or under sidings.
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