Open Cell vs Closed Cell Spray Foam Insulation: Whats the difference?

Open cell and closed cell comparison

So you want to compare open cell vs closed cell spray foam insulation? Well, you’re in the right place. You will learn the differences and which type of insulation is the most suitable for your project.

Open Cell

Open cell spray foam insulation, is a soft breathable insulation normally used when timber is involved and allows timbers to breathe. It would be the best type of spray foam insulation for you if suited. This is very ideal for lofts, underfloor, walls, crawlspaces, and commercial use. On the other hand it can also be used on non breathable surfaces such as metal. The spray foam insulation expands around 100 x its original volume once applied, which allows it to fill hard to reach places, that traditional spray foam insulation cannot get to.

Closed Cell

Closed cell spray foam insulation is ideal for continuous insulation solutions. A perk which is good to know for you is, closed cell spray foam insulation rejects bulk water, it helps prevent draughts in your property and can be applied in narrow spaces to reach high u-values. Last but not least for you, closed cell insulation also cuts down on humidity, but it does not allow moisture to be breathed through it. That can make it more beneficial for industrial properties.

Comparing open cell v closed cell spray foam insulation

comparison Open Cell v Closed Cell

What Open Cell & Closed Cell foam specify in

Open Cell is for anything with a timber frame as open cell is a breathable insulation product so it then means it allows the timber to breathe as well and not rot. This insulation product would be perfect for you, if you want to insulate your home.

Closed Cell would be more beneficial for an Exterior application. Closed Cell insulation is used on a metal surface and is mainly used for industrial purposes. This is mostly used for metal, ships, containers, marines, shipping containers, industrial, and basements. It can also be used in properties as it adds wall racking strength and structural integrity to the building.

The BIG question – “Does spray foam insulation rot your timbers”

Heres what you need to know Open celled spray foam insulation. It’s a breathable insulation product. Once the open cell spray foam insulation is applied, to any surface it grants any moisture around to have the process to dry out through evaporation. Now get this, this is important as timbers and also masonry surfaces e.g. lofts, need to be capability to breathe to make sure, that no damp or rot interference become available.

Advantages to Open Cell & Closed Cell Spray Foam

  • Prevents heat loss.
  • Open Cell spray foam is breathable.
  • Fire retardant.
  • It fills in the gaps – Spray foam insulation expands up to 100x its size so it fills every crack and crevice in the section which is being installed.
  • It resists mold when it forms firmly to the area applied on the building, it cancels out air from having the opportunity of traveling in or out of the area. When warm air flows through a warm building and then finds cooler air outside a step called condensation starts to happen. Condensation is a moisture that eventually can create mold which can damage the structure of a property.
  • Its a money saving product.