During construction, the great British weather inevitably gets a building’s shell thoroughly soaked before the roof goes on and it can begin to dry out. Using insulations that trap moisture and do not allow it to easily escape can cause damage to timber frame buildings and roof structures.Steico sheathing and sarking boards are designed to be exposed to the elements during construction by adding in paraffin wax (candle wax) to the mix during manufacture. This means rain will repel, even when a board is cut, as the wax is ‘through and through’. Additional protection should be considered if the wood fibre is too exposed to prolonged bouts of heavy rain.
Whilst wood fibre insulation can appear to absorb rain water it dries very quickly afterwards without any detriment to the insulation material itself. Materials such as glass or mineral wool take up water in a similar way but are not able to dry quickly and should be removed if soaked to avoid damage to timbers.
Obviously, you should try and avoid soaking your insulation materials but if the worst happens you know that wood fibre will have no issues.
Wood fibre is clean and easy to use, there’s no chance of toxic dust, fibres or dust.In short, it’s easier to handle and fit meaning that the installer tends to achieve a higher quality job. The snug fitting batts leave no gaps and the tongue and groove profile for the rigid boards ensures a tight secure fit with no gaps.