Why is projected polyurethane more and more used in countries with the highest air tightness requirements in enclosures? The answer is clear and concise: it guarantees an airtight insulation without extra components with up to 50% more efficiency than other insulating systems, which results in a saving of money and energy.
It is a fact: in the United States, the United Kingdom and France, the use of polyurethane spray foam has spread in recent years due to the requirements on air tightness in their respective building codes.
Approximately 50% of the energy lost in buildings is caused by air infiltration through attics, walls, basements and empty spaces. Therefore, one of the main requirements of buildings with almost zero energy or passive buildings is air tightness to limit energy losses through the enclosure.
Insulating polyurethane systems seal the building's envelope to stop conditioned indoor air from escaping and prevent unconditioned air from entering a building. With a closed cell content over 90%, SPF outperforms other options for structural strength, life expectancy and life-cycle costs.
Airtight insulation with polyurethane, a good idea?
Closed-cell insulation has a structure that creates a rigid, hard foam. The sealing, continuity of application and impermeability that the foam provides offers air tightness and no additional vapour barrier is needed for most applications, nor other accessories such as adhesives, tapes, separators or sealants that guarantee air tightness of the enclosure.
Also, thanks to its rigid nature and ability to adhere to many materiales, closed-cell SPF can provide structural enhancement to framed buildings. The racking strength of certain framed walls can be significantly increased with spray foam.
Because it is spray applied, closed-cell foam has many applications and possibilities, including: exterior/interior walls, floors/ceilings, etc.
Benefits of polyurethane systems for insulation
- They are a perfect fit every time.
- They meet air barrier requirements.
- They are not damaged by water.
- They don’t cause framing distortion.
- They don’t wick or absorb water.
- They don’t contain formaldehyde.
- There’s no settling or sagging.
- They don’t shrink.
- No drying time required.
- They are easy to remove.
- They have no food value for vermin and insects.
- Closed cavity injectable.
- Performance stability.
Interested in Synthesia Internacional's polyurethane systems? You can contact us for more information.