Roof Jointing

The slates or tiles should be bedded on either a roof mix mortar or a low shrink, high quality external grade sealant taking care not to use excessive amounts that will spread out and block the side water channels. This is the first line of

No, this is not necessary. Where the roof is in the same plane either side of the roof joint, the wind loading is not increased in the same way that it is at the eaves, verge, valleys and ridge.

The design of the product when fitted on top of the tile or slate battens will cause this effect. It acts in the same way as a swept verge and encourages the water to run away from the roof joint. Whether using slates, plain tiles

Unsealed overlaps such as this should lap by a minimum of 150mm when measured vertically. This converts to 350mm at this low pitch.

This depends on the situation. If the external roof covering is at the same height on either side of the Dry Fix Bonding Gutter®, then the central upstand should be cut down at an angle to allow the ridge tile to pass over the joint in

Both the traditional Danelaw mortared type and the Dry Fix Bonding Gutter® design work to the minimum recommended pitch of the slates or tiles being used with them.