Frame Roof Valleys Using Battens

The spacing of the battens depend on the type of roofing material and are applied horizontally.

Frame roof valleys using battens.

Shingles and tiles are affixed using the battens as spacing. 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. Roofing battens or battening also called roofing lath are used to provide the fixing point for roofing materials such as shingles or tiles. Place the flashing on the upper portion or the upper flange of the.

Hip and valley joints. Batten joints should be staggered over the roof so that three consecutive battens nz 2 consecutive battens are not jointed on the same rafter. 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. Battens should be nailed.

Metal roof battens will not warp or rot nor are they subject to insect attack. Access the roof using an extension ladder. 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. Metal roof battens may be used with steel or tile cladding.

Install the valley battens on the sides of the roof that you want to place the valley flashing. If the batten does not sit flat in the valley cut the battens into shorter lengths to allow for the excess creep. 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. To minimise cutting lay the battens in one direction starting from one end of the roof.

Measure each section of the roof from side to side parallel to the line of the fascia board. Battens must be installed to support the entire width and length of ridge eave hip valley and gable end trims. Fasten the roof sheets to the batten as per the appropriate stratco roofing specifications. Battens are not always used in a roofing system.

For this example a section of roof is 20 feet wide. All joints in battens must meet in the centre of trusses or rafters and not be joined over girder trusses. 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. Step 2 install the valley battens.

Fix through the ridge flashing into the roofing batten as shown below using the appropriate cladding screws. Metal roof battens may also be used with steel or timber support framing. 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.