The rest of the trusses are in place, and most of the sarking is completed. The sarking is 22mm softwood planks, and is traditional construction in Scotland. It leads to a better, stronger roof. On top of this will be laid a breathable membrane, which in addition to doing the same job as felt, will allow us to NOT have any ventilation above the insulation. This ventilation is usually there to provide some airflow, and help prevent interstitial condensation in the roof build up.The membrane, unlike traditional felt, allows the roof to breathe directly. So no vents top and bottom of the roof, which allows the more traditional look. The traditional look worked fine in the olden days, when roof had no insulation whatsoever.
Tuesday, 15 July 2008
Sarking
The rest of the trusses are in place, and most of the sarking is completed. The sarking is 22mm softwood planks, and is traditional construction in Scotland. It leads to a better, stronger roof. On top of this will be laid a breathable membrane, which in addition to doing the same job as felt, will allow us to NOT have any ventilation above the insulation. This ventilation is usually there to provide some airflow, and help prevent interstitial condensation in the roof build up.The membrane, unlike traditional felt, allows the roof to breathe directly. So no vents top and bottom of the roof, which allows the more traditional look. The traditional look worked fine in the olden days, when roof had no insulation whatsoever.
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