Convert W Truss To Attic Truss

The sad fact is your builder could have installed attic trusses over this garage for just slightly more than what the existing trusses cost.

Convert w truss to attic truss.

A truss frame will occupy the majority of the space within the loft which means that the whole structure needs replacing if you decide to convert your attic. An open space would have been much more practical. Attic trusses have a rectangular shape inside each truss. Roof support ceiling below new floor framing etc.

The role of the horizontal beam is to tie the truss together and carry the load that would otherwise be sustained by the support and vertical timber also known as the king post. Measure the width of your roof trusses from inside to inside. A friend of mine who was a structural engineer explained to me that the cost to the builder would have been significantly more if he had built the roof with a large open space. They allow a house roof to be erected and felted in a day.

If the roof slope is steeper than 9 inches in 12 inches of run it doesn t take much width to end up with a nice room 12 feet wide with an 8 foot. There are many issues to consider with this type of renovation. Often the height of the roof may be too low when constructed with truss rafters which means that it may need to be raised too. Measure in from the lower edge of the roof to a point 1 4 the width of the truss on either side of the attic.

The trusses are double cantilever style. The main problem with raising the roof is that it requires planning permission and there s a fairly good chance this will be refused especially for terraced. Attic conversions are now possible by replacing the truss rafters with a shaped trusses or horizontal beams which in return create additional space. Late 1960s the most popular form of construction used factory made roof trusses.

Room in roof trusses can be craned into place to form the shell of a ready made new loft room with the insulation placed above the rafters for maximum thermal efficiency. Use a chalk line to draw a line along the floor parallel to the lower edge of the roof from one end of the attic to the other on both sides. These utilise thinner and therefore cheaper timbers but have structural integrity by the addition of braced diagonal timbers. The attic space is 22 on the side parallel to the trusses 28 on the other side.

When and why did the truss roof become popular. It s a 12 12 roof so that s a good 11 at the ridge which even with new floor joists and a 5 knee wall should be plenty of room for a nice space.