Before covering the roof, ensure that the fascia is set at the correct height, so the roof tile remain consistent with the pitch of the roof or with a sprocket to slow the flow of rain water into the gutter.

Tiles are required to project into the gutter a minimum of 50mm across the gutter.

When using profiled tiles such pan tiles or double romans, proprietary comb filler should be installed to prevent vermin entry.

Any gaps within the roof coverings that exceed 10mm should be closed off to prevent the entry of birds etc.

Underlay at the ridge to have a clear gap of 5mm throughout its full length to provide high level ventilation.

Additional batten provided at the ridge to provide a fixing point for the dry ridge system. Batten installed as per the manufacturer’s instruction, this will require the use of a strap.

Ventilating ridge roll with self-adhesive butyl strip installed at the ridge.

Self-adhesive strips pressed firmly against the clean tiles.

All ridges should be fixed twice.

This will be achieved by the jointing strip between the ridges mechanically fixed with a self-sealing non-ferrous fixing and washer detail.

At intersections with valleys, fixings will need to be provided within the ridge and in accordance with manufacturers instruction.

Proprietary ridge end-caps should be used with dry fix systems.

All dry fix products must be compatible with the roof tiles and supplied by the roof tile manufacturer.

Avoid small cuts of less than ½ a ridge tile, spread the cut over 2 ridges and place away from the gable.

Wet bedded “baby” hip/ridge tiles to low level roofs such as porches and ground floor bay windows, do not require mechanical fixing.

The mortar should be 1:3 cement: sand with plasticiser.

The mix should be based on the use of sharp sand and soft sand with at least 1/3 sharp sand content.

Hip ridge tiles should be laid to a line to ensure ridges are straight.

Hip irons can be used at the eaves. Ridge tile to be neatly pointed around the hip iron.

Alternative to using a hip iron at the eaves, a proprietary ridge can be used.

At the peak of the hip a saddle of lead or similar approved product should be provided below the hip ridge.

Three-way and four-way mitres at the peak of the hip should cut to ensure tight joints.

Joints should be sealed with mortar or a manufacturer approved sealant.