Ridge and hip capping rebed — flexible polymer mortar systems

Bostik SL Flex Pointing Mortar is a two-component polymer-modified bedding and pointing mortar designed for ridge and hip capping rebed on pitched tiled roofs. The polymer content within the mortar system provides the critical flexibility that traditional rigid sand and cement mixes lack — thermal movement in roof cappings is the primary cause of cracking and failure in rigid rebed systems, and the polymer modification in SL Flex is specifically formulated to accommodate this movement without cracking over time. The product is Australian-made and is suitable for bedding and pointing terracotta and concrete ridge and hip capping on Class 2 strata and residential buildings. The two components are mixed on site in the correct ratio immediately before application. Like all polymer-modified mortars, the mix ratio is critical — deviation from the manufacturer's specified ratio compromises both strength and flexibility. The substrate must be primed or dampened before application as specified in the current TDS, and application below the manufacturer's minimum ambient temperature must be avoided to prevent incomplete curing. Confirm current product name, formulation, and specification with Bostik Australia before specifying.

Laticrete 254 Platinum is a polymer-modified mortar from Laticrete Australia used for bedding and pointing ridge and hip capping where a high-bond, flexible bedding mortar is required. As a water-activated single-component dry powder, 254 Platinum offers a simpler mixing process compared to 2-part systems — only water is added on site, reducing the risk of incorrect component ratio. This is an advantage on roofing sites where mixing accuracy may be more difficult to control than in controlled laboratory or workshop conditions. 254 Platinum provides the flexibility required to accommodate the thermal movement of ridge and hip capping in Australian roofing conditions. It is suitable for use under terracotta and concrete ridge and hip capping. Laticrete 254 Platinum is primarily known as a tile adhesive, and its application as a ridge capping bedding mortar must be confirmed against current Laticrete Australia technical guidance and the active TDS for the specific application, roof tile type, and substrate condition. Confirm current product name, mix water ratio, and suitability for exposed ridge capping bedding with Laticrete Australia technical before specifying.

ARDEX S 28 WR (or equivalent current ARDEX polymer-modified pointing mortar) is a polymer-modified, weather-resistant pointing and bedding mortar from ARDEX Australia, suitable for ridge and hip capping bedding and joint pointing on tiled roofs. ARDEX is a well-established Australian remedial and tile products manufacturer with a broad range of polymer-modified mortars and waterproofing systems. The S 28 WR (or current equivalent) is positioned for external, weather-exposed mortar pointing and bedding applications where flexibility and weather resistance are required. Like all ARDEX products, the application requires confirmation of the current product TDS, mixing ratio, substrate preparation, and priming requirements directly from ARDEX Australia or the current ARDEX technical datasheet before specifying. Confirm the current ARDEX product name for polymer-modified ridge and hip capping bedding mortar applications — ARDEX product naming and formulation may be updated periodically. Confirm the product through ARDEX Australia trade supply or technical support.