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CAUSES OF SPRAY FOAM INSULATION DAMAGE YOUR PROPERTY
If spray foam insulation is incorrectly applied to your property’s roof, it could well cause a problem with moisture retention within your timber, leading to further complications that may well need professional repair.
Porous spray foam insulation (Open Cell) is designed to allow for the passage of air, however, the foam itself can act a bit like a sponge, absorbing moisture and then holding it against the timber it was designed to protect.
Non-porous foam (Closed Cell) however does not allow for airflow, and any moisture that comes into contact with the foam will sit on top and be held against the timber by the foam, again causing a potential moisture problem in the timber.
Both of these examples are problems, the only difference is the method through which the spray foam insulation causes moisture to enter your property’s timber.
So, if improperly applied or bonded, spray foam insulation can cause timber to absorb and retain moisture, leading to issues such as dry and wet rot, which can spread easily and ruin your timber.
Reducing the ventilation capacity of a roof can also heighten the risk of condensation building up within the roof void, causing an attic to develop potential damp and mould issues in the future.
HOW DO YOU KNOW SPRAY FOAM INSULATION IS HARMING FOR YOUR PROPERTY?
Because spray foam insulation is normally applied in space we don’t spend much time, it may well be difficult for someone to absent-mindedly notice an issue developing in their loft.
Even if somebody was to look at their loft in greater detail there is still no guarantee that they will spot a problem with the insulation, because it would be impossible to see what is happening beneath the foam.
It could well be that your roof has a leak and the water is collecting behind the foam, that the timber in the roof is rotten, or that maybe even some of the building materials have degraded behind the insulation which is impossible to see behind the foam.
Of course, if you have noticed that condensation in your loft space has built up, dry rot beginning to spread through the timber in your loft, or woodworm beginning to take hold of the timber, then perhaps the spray foam is causing an issue. Essentially, it’s very difficult for a layperson to judge.
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