While decking is not required for a metal roof and is often not used for shops barns or other outbuildings if a metal roof is being put onto a home or a garage the use of decking is common.
Frame roof valleys using battens.
Metal roof battens may also be used with steel or timber support framing.
Fix through the ridge flashing into the roofing batten as shown below using the appropriate cladding screws.
Install the valley battens on the sides of the roof that you want to place the valley flashing.
Step 2 install the valley battens.
Access the roof using an extension ladder.
For this example a section of roof is 20 feet wide.
Battens should be nailed.
Shingles and tiles are affixed using the battens as spacing.
Battens are not always used in a roofing system.
To minimise cutting lay the battens in one direction starting from one end of the roof.
Hip and valley joints.
The battens are made in approximately 3 0m lengths to allow for cladding creep along the width of the roof.
Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
Battens must be installed to support the entire width and length of ridge eave hip valley and gable end trims.
Roofing battens or battening also called roofing lath are used to provide the fixing point for roofing materials such as shingles or tiles.
Measure each section of the roof from side to side parallel to the line of the fascia board.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
A batten is a roofing component made of a thin layer of metal plastic or wood and is used as a fixing point for roof tiles and roofing sheets.
Metal roof battens may be used with steel or tile cladding.
Caution battens or purlins as they are sometimes called must be fastened to the roof joist or trusses with the proper length and number of fasteners to prevent pullout.
If the batten does not sit flat in the valley cut the battens into shorter lengths to allow for the excess creep.
All joints in battens must meet in the centre of trusses or rafters and not be joined over girder trusses.
The spacing of the battens depend on the type of roofing material and are applied horizontally.
The plywood covers the entire roof and is solidly attached to the rafters providing a sturdy base for both insulation and metal roofing panels.
Batten joints should be staggered over the roof so that three consecutive battens nz 2 consecutive battens are not jointed on the same rafter.
The next batten is to be placed with at least one mount flange overlap figure 3 making sure the next batten sits down flat in the existing roof cladding valleys.
Place the flashing on the upper portion or the upper flange of the.
