Dry Ridge - Ridgeboard

• Working Procedure - Flat Tiles & Slates
• Components - Flat Tiles & Slates
• Working Procedure - Profiled Tiles
• Components - Profiles Tiles
• Documents

1. Ensure that the ridgeboard projects above the rafter intersection by the dimension in millimetres given in the table below.

2. When constructing a ventilated ridge using a vapour permeable (LR) underlay lap the underlay over the ridge.

If using a non vapour permeable (HR) underlay then leave a 5mm gap at the ridge to allow for air movement from the roof space. For a non ventilated ridge lap the underlay over the ridge.

3. Batten the roof to the required gauge. Position the top tiling batten approx 35mm down (or 10mm if the Hardrow top slate is being nailed into a batten) from the ridgeboard measured on the rafter.

Lay the roof tiles in the normal manner.

4. Working from a gable lay top fillers on the top course of tiles or slates at the same time as positioning a blockend ridge. Secure the blockend with 2x80mm hammer screws provided placing a plastic seal under the end of the ridge tile.

Note: The block end ridge must be secured with an 80mm hammer screw and integral washer through at least one of its nailholes. The unused nail-hole should be sealed with a silicone sealant.

Subsequent top fillers can now be clicked into place along the ridge before the placement and fixing of the next ridge tile and seal.

5. Secure each ridge tile using 2 x 80mm hammer screws and integral washer provided making sure that the washer makes a watertight seal over the nail-hole.

It may be necessary to cut a ridge tile to suit the ridge length. Always finish on a full blockend.

Figures given are bsed on a nominal 30mm wide ridgeboard

1. Ensure that the ridgeboard projects above the rafter intersection by the dimension in millimetres given in the table below.

2. When constructing a vented ridge using a non vapour permeable (HR) underlay fix a mono pitch felt spacer to one side of the ridge board using a 25mm nail provided.

Secure the felt on the non-vented side to the ridge board.

Note: If the ridge is to be non-vented or when using a (LR) underlay then omit the mono pitch felt spacers and lap underlay over the ridge board.

3. Lay the roofing felt to finish 15mm from the top of the felt spacers.

Position the top tiling batten in the desired position, for the slate or tile.

4. Tile the roof in the normal manner and lay either vented or nonvented
top fillers on the top course of tiles or slates. Place a block end ridge at the gable end, positioning a ridge seal and subsequent top fillers before the placement and fixing of the next ridge tile and seal.

Note: The block end ridge must be secured with an 80mm hammer screw and integral washer through at least one of its nailholes. The unused nail-hole should be sealed with a silicone sealant.


5. Secure each ridge tile using 2 x 80mm hammer screws and integral washer provided making sure that the washer makes a watertight seal over the nail-hole.

Figures given are bsed on a nominal 30mm wide ridgeboard