Cover with a strip of underlay 600mm wide, overlapping general underlay. Cut slates nearly and accurately, bevelled edge down. Interleave with lead soakers to form a straight, weathertight, close-mitred junction. Fix soakers by nailing to battens at the top edge.
N.B. Careful consideration must be given to mitred hip details at low roof pitches and in areas of severe exposure.
Mitred Hip Soaker Widths
|Pitch||Minimum width at head|
|30-35 degrees||35 degrees +|
Cover with a strip of underlay 600mm wide, overlapping general underlay. Fix hip iron to hip rafter with 5mm hot dipped galvanised screws or nails. Hip irons to BS 5534: 2003, hot-dip galvanised after manufacture. Cut slates to fit closely at junction. Make weathertight with ridge tiles laid to a true line with edges and joints, solidly bedded in mortar, neatly struct off flush as the work proceeds. Shape first tie to align with corner of eaves and fill end with mortar and slips of slate finished flush. Mortar for bedding hip tiles 1:3 cement: sand pigmented to approved colour.
METAL ROLL HIPS
Metal roll hips should confirm with sheet metal technical recommendations.
For advice on pitches less than 30 degrees contact the Welsh Slate Technical Department.
EAVES AND VERGES
Dress underlay into gutter and pull tight to ensure no water retaining troughs and support with tilting fillet. Fix undereaves and eaves course of slates with tails aligned and projecting 45mm (minimum) to 55mm (maximum) beyond the fascia tilting fillet or wall face. Longer slate nails may be required at the eaves courses.
VERGE ON BARGEBOARD
Ensure that the undercloak and underlay are well lapped. Nail undercloak fair face down, to a true line and projecting 38mm (minimum) to 50 mm (maximum) from face of bargeboard. Fill the gap between undercloak and slates with mortar, and strike off to give a neat flush joint. Mortar for bedding and pointing. 1:3 cement:sand pigmented to match colour of slates.
VERGES ON BRICKWORK
Ensure that undercloak and underlay are well lapped. Bed undercloak in mortar fair face down, to a true line, projecting 38mm (minimum) to 50mm (maximum) beyond face of wall, and point neatly to match in with joints in walling. Cut verge slates as necessary and fix flush with undercloat. Fill the gay between undercloak and slates with mortar, and strike off to give a neat, flush joint. Mortar for bedding and pointing, 1:3 cement:sand pigmented to match colour of slates. Note: Where possible use slate-and-a-half slates to alternate courses to form verges.
The above diagram gives a brief explanation of the terms that are commonly used throughout the roofing industry. They are by no means comprehensive and the terms may vary in different regions.