Metal Sales Soffit Panel - Manual (Page 23)

© Metal Sales Manufacturing Corporation / Subject to change without notice, effective 02/09.
22
ARCHITECTURAL DESIGN / INSTALLATION CONSIDERATIONS
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ture.
The installer should check the roof deck for squareness before installing Architectural panels. Several methods can be used to
verify squareness of the structure for proper installation of the panels.
METHOD "A" - One method for checking the roof for squareness is to measure diagonally across one slope of the roof
from similar points at the ridge and eave and obtain the same dimension.
METHOD "B" - The 3-4-5 triangle system may also be used. To use this system measure a point from the corner along the
edge of the roof at a module of three (3). Measure a point from the same corner along another edge at a module of four (4).
Then by measuring diagonally between the two points established, the dimension should be exactly a module of five (5) to
have a square corner. Multiple uses of this system may be required to determine building squareness. If the endwall cannot be
made square, the roof system cannot be installed as shown in these instructions.
Method A
Method B
30
5
CONDITION OF SUBSTRUCTURE
3
4 30
Proper design and installation of vapor barriers and ventilation systems are important to prevent condensation and the result-
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Condensation occurs when moisture laden air comes in contact with a surface temperature equal to or below the dew point of
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construction.
The underside of the metal roof on a typical Atchitectural building should be protected from condensation by installing panels
directly over a minimum 30 lb moisture barrier and uniform solid substrate.. This reduces airspace and the potential of con-
densation forming on the underside of the panels.
VENTILATION
TYPICAL METAL BUILDING (NO ATTIC)
Vent
Vent at wall
Vent at
eave
BUILDING WITH ATTIC OR RETROFITTED
Vent
Insulation