More than with other types of roofing, the planning of a shingle roof made of wood is crucial. Apart from the quality of the shingle, the wood, the roof pitch and the type of attachment play an essential role. A carefully mounted shingled roof can last up to fifty years.
Dehydration and native woody plants
The decisive trick for the durability of a shingled roof is the perfect exploitation of its natural properties. The shingles must be able to dry out again and again to a moisture content of less than twenty percent. This is guaranteed by the right shingle quality, the right arrangement and a professional installation.
In the past, mostly woody shrubs with low delivery distances were chosen as trees for a shingled roof. The native coniferous trees such as larch, fir or spruce have only a lifespan of twelve to forty years. By impregnation or smoking it can be extended by several years.
Canadian tree species
In the present time, with their world-wide transportation system, shingled roofs are mainly used for Canadian woody plants. Especially the family of the life trees, in Latin Thujas, and different cedar species are used. They bring with their high resin content a great resistance to fungal and insect infestations.
- Red Cedar
- White Cedar
- Yellow Cedar
- Alaskan Cedar
- Canadian Larch
- White Eastern Cedar
Top Layers and Back Ventilation
When covering a shingled roof, a two-ply covering is carried out with a roof pitch of more than 71 degrees. For shallow roof pitches between seventy and 23 degrees, the shingles are nailed to a battens for ventilation. For even flatter roof pitches, a water-repellent sub-roof must be installed. From a slope of around 15 degrees, a shingled roof is no longer possible.
In addition to the rear ventilation of the shingle roof, the mobility of the individual shingles must be taken into account. When the top of the shingle gets wet, the edges line up towards the roof. When they dry out, they move in exactly the opposite direction. To give them the necessary mobility, each roof shingle may only be fixed with two stainless nails.Tips & Tricks Note that some trees can damage metals with their acidic ingredients. The patina of copper is prevented, for example, by cedar resin. For gutters and other metallic components on your shingled roof, it is best to use stainless steel.