General guidance on the most important points to be considered is given below.
Eaves slate roof construction detail.
The cant strip is variable in thickness according to the thickness of the slates being installed thicker slates require a thicker cant strip.
Fix a plywood board or proprietary tray to provide continuous support to underlay to prevent water retaining troughs.
Step by step projects creative homeowner ed 2004 isbn 10.
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Effective design of a slate roof must take into account a number of inter related factors including site exposure the pitch of the roof the type of slate selected and the slate lap.
Detailing a low pitch eaves the lower the roof pitch the more difficult it becomes to construct an effective eaves system particularly where roofspace ventilation is required.
Gable edge projection and drip edge projection can also vary somewhat.
Full application and sitework details are given on pages 8 to 22.
After gutters and or fascia is installed fascia eave starter fasteners as required fascia board field form to roof pitch.
The above illustration shows basic installation details for a traditional standard thickness slate roof.
Slate roof valley gutter detail.
1 inch 25 4 mm 1 mile per hour 0 447 m s.
Slate roof valley gutter detail.
Eave starter detail a shingle clips see p 8 roof decking shake or slate panel underlayment ice water shield flush to eave starter fasten every 12 o c.
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Minimum slate headlap moderate weather this table of slate overlaps and roof angles shows common sizes of roofing slate and the recommended slope for the corresponding slate size.
Construct a soffit or eaves overhang combined with assuring that an opening is provided all along the top of the building wall by removing any blocking between roof rafters at the top plate combined with use of roof insulation baffles to assure an air inflow pathway under the roof deck.
Fix a rafter spacer tray to provide a clear air path between underlay and insulation.
905 1 2 ice barriers in areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table 301 2 1 an ice barrier shall be installed for asphalt shingles metal roof shingles mineral surfaced roll roofing slate and slate type shingles wood shingles and wood shakes.
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If your property s roof is in the green moderate part of the uk but you know of prevailing bad winds or weather you may wish to use the other chart instead.
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