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CONVENTIONAL
ROOF SYSTEMS
Conventional roof systems are being more
widely used with log homes; therefore, this section will offer brief
information concerning conventional roof system installation.
Refer back to the section on Premier Roof Systems.
The basic differences in conventional and
Premier Roof Systems should be noted.
The Premier Roof System framing consists of 3x12 ridge beams and
valley rafters and 4x8 main rafters and collar ties with 2x6 tongue &
groove decking on top. Overhead
wiring is run on top of the 2x6 decking.
The bottom side of the 2x6 decking (V-groove side) functions as the
interior ceiling, and all rafters are exposed.
A vapor barrier and vented roof insulation panels are installed as
the next layers on top of the decking.
The final layer on topof the insulation is 7/16-inch OSB.
Felt (optional) and finished roofing are then supplied by the owner. The exterior roof overhang areas are left exposed and are not
enclosed.
Conventional roof systems are framed by
either stick-building with 2x rafters or by using pre-manufactured roof
trusses or a combination thereof. Collar
ties made from optional 4x8 material may be used with the 2x framing and
left exposed to view from within the home, giving a cathedral ceiling
look. If a flat ceiling is
desired upstairs, simply use the standard 2x collar ties.
All other framing is not exposed to view.
Once the roof is framed, the exterior sheathing, 7/16-inch OSB, is
applied using plywood clips to prevent sagging between rafters.
Felt and finished roofing are the last two layers.
Soffits may be built with rough sawn plywood (with ventilation) to
enclose the roof overhang areas. Other
soffit material could be tongue & groove pine or cedar deckings;
vinyl; exterior wood paneling. The
entire perimeter of the roof system should be covered with 1x fascia to
hide the framing. Wiring is
run from underneath (inside the house), through the trusses or rafters. Insulation is also applied from underneath after the rough-in
electrical inspection is performed. It
can either be blown in or regular batt insulation may be installed.
The covering for the ceiling (sheetrock, 1x tongue &groove,
etc.) is attached to the bottom of the
rafter collars or trusses. If
optional 4x8 collars were used, they will be left exposed for a cathedral
ceiling look.
Another difference between conventional
roof systems and the Premier Roof System is cost.
Conventional systems are considerably less expensive from the
standpoint of both materials and labor, and, with conventional roofs, the
home is “in the dry” faster as well.
Both roof systems offered by Tennessee Log Homes have their merits.
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