Is polystyrene good for loft insulation?
You can use batts, polystyrene slabs, expanded polystyrene or spray foam to insulate your roof or loft space. Spray foam is usually a job undertaken by professionals. Although there are DIY options available in the marketplace. One of the advantages of warm loft insulation is that it is ideal for a flat roof.
Is polystyrene insulation any good?
1) Polystyrene has a high thermal resistance Extruded polystyrene (XPS) and expanded polystyrene insulation (EPS) contain millions of air pockets trapped within the foam. Because the polystyrene itself is also highly resistant to heat, the result is a great thermal insulator which can give excellent R-ratings.
What is the R-value of polystyrene per inch?
3.6 to 4.0
Foam Board Insulation R-Value by Type + Chart
| Type of Insulation | R-Value |
|---|---|
| Polyisocyanurate | 7.0 to 8.0 for each inch of thickness |
| Extruded polystyrene foam | 4.5 to 5.0 for each inch of thickness |
| Expanded polystyrene foam | 3.6 to 4.0 for each inch of thickness |
What is the R-value of EPS roof insulation?
3.6 per inch
EPS insulation features an average r-value of 3.6 per inch. In addition to providing energy efficiency, EPS without film facers has a perm rating of up to 5.0.
Is polystyrene a fire hazard?
Polystyrene is highly flammable and ignites at relatively low temperatures. It has been linked with huge fires, often in commercial buildings and warehouses, where its use is more common.
Can Celotex be used for loft insulation?
Using rigid insulation board as loft insulation Some people may prefer to use rigid insulation board to insulate the loft space – for example Celotex or Kingspan – the process is pretty similar to above, although you will need less depth to achieve the same insulation levels (than mineral wool).
What are the disadvantages of polystyrene?
Disadvantages of Polystyrene include:
- Brittle, poor chemical resistance especially to organics.
- Susceptible to UV degradation.
- Flammable.
Is polystyrene better than rockwool?
Advantages of Expanded Polystyrene (EPS) over Mineral wool insulation: More cost-effective option. More efficient by offering a superior thermal performance. Provides high resistant to heat flow and moisture penetration.
What is the R-value of 2 inch blue STYROFOAM?
A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.
What is the difference between extruded and expanded polystyrene insulation?
XPS is manufactured in a continuous extrusion process that produces a closed cell form of foam insulation. EPS, on the other hand, is manufactured by expanding spherical beads in a mold and then using heat and pressure to fuse the beads together. Each product has proponents claiming one out performs the other.
Is polystyrene insulation legal?
Put simply, no. This may of course change and the building regulations are updated regularly and so should be consulted. However at the time of writing this blog, polystyrene ceiling tiles and polystyrene construction products generally are not illegal.