SIG Roofing supplied a new low-pitched roof for a primary school in Enfield, Co. Westmeath, which posed challenges due to the 9m rafter length. To overcome water drainage issues, SIG Technical and La Escandella proposed the Planum Smooth Clay Tile, designed for low-pitch roofs down to 10°. This tile ensures perfect waterproofing and has undergone rigorous testing for wind-driven water ingress. Along with Tyvek Supro membrane, counter battening, ventilation, and a recommended fixing specification, the roof system received a 100-year manufacturer-backed warranty. Read the full case study below:
SIG Roofing provided a new low-pitched roof for a primary school in Enfield, Co. Westmeath. The proposed roof pitch was 17° however this wasn’t the only issue. The rafter was 9m in length and this is where SIG Roofing’s technical assistance was required.
Most low-pitch tiles / or slates struggle on rafters longer than 7.5m. The water isn’t moving fast enough off the roof because of the length of the rafter. Wind can drive water back up the roof and over the head for the tiles/slates which may become a severe issue at this pitch. The contractor required a manufacturer-backed warranty for this situation.
To achieve this, SIG Technical and La Escandella proposed the Planum Smooth Clay Tile. This tile is specially designed for low-pitch roofs down to 10°. Planum tiles are double interlocking flat clay roof tiles, perfect for waterproofing. Planum Clay Tiles are rigorously tested for wind-driven water ingress under hurricane conditions in Florida. Due to this design, La Escandella could also guarantee this tile on a 9m rafter at 17°.
The use of a superior roofing membrane – Tyvek Supro, as well as counter battening and adequate ventilation, were all specified to ensure a waterproof system. A fixing specification of nailing and clipping was also recommended to ensure all tiles were safely and effectively installed. A 100-year manufacturer-backed warranty was issued for this roof.
