The Roof

 Concrete Tile Roof – long lasting value

A concrete tile roof is the best traditional roofing option. Very long lasting, long
warranty period, and little maintenance (the tiles should be sealed with a special sealer every 40 years or so). The engineered roof trusses must take into account the additional weight of the tiles. For extreme wind conditions – like the north west coast of Vancouver Island – tie down clips can provide more wind protection.

 Sloped ICF solid concrete roof – Hawaii

Roofing is a challenge for us at Nutmeg Homes. The roof systems that commonly are available, and are reasonably priced are – arguably – the weakest part of a Nutmeg Home. The ICF wall system, and many other components of a Nutmeg home should easily last several centuries. A wood frame roof can not confidently make that claim, especially in the rain forest climate of most of Vancouver Island. Fire, severe wind events, mold / rot / moss, ageing, wear and tear will limit the life span of a wood frame roof.

 Engineered Factory built Roof Trusses

The most common, if not only, residential roof frame, is an engineered pitched truss system. Using computer modelling, and engineer approved designs, a truss company builds all, or most of the roof system in a factory, using metal plates to attach pieces together. The pre-built trusses are then shipped to the building site and put in place with the help of a large crane. The other type of wood roof frame is the hand frame method. This is very rarely done and can be almost called a lost skill.

After the roof frame is completed and sheeted if necessary, the roof material is applied. Most likely choices are:

The first three options require a wood sheet (chip board or plywood) surface on the trusses; concrete tiles use a special fabric and wood strapping. Wood shingles are not listed, as they are not a reasonable option (fire and moss issues, for example).

Natures’ natural insulator, and water purifier, and work of art …

Chapter Two – Part 3 – The Green Roof