Natural Stone Ridge Ventilation with GRP Liner
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Solution Overview
Problem
Traditional stone ridge installations using cement mortar fail to meet modern ventilation and mechanical fixation requirements, particularly in areas where natural stone is mandated by planning regulations, leading to moisture accumulation and reduced lifespan of replica stone ridges.
Innovation Solution
A ridge mounting and ventilation system utilizing pairs of flat natural stone slates bonded along their mitred edges with a glass-reinforced polyester (GRP) liner, incorporating spacers for ventilation and corrosion-resistant mounting brackets for mechanical fixation, ensuring a weatherproof and ventilated roof structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cement mortar is used to bed the ridge tile, then the ridge is weatherproof and mechanically secured, but the ridge traps moisture and prevents ventilation
Solution Approach 1:
The ridge system is segmented into multiple functional components: the natural stone ridge tile, the GRP liner layer, the spacer elements, and the ventilation channels. This segmentation allows each component to perform its specific function - the GRP liner provides weatherproofing while the spacers create ventilation gaps, resolving the contradiction between sealing and venting.
Solution Approach 2:
The GRP (glass-reinforced plastic) liner acts as an intermediary layer between the ridge tile and the underlying structure. It provides the weatherproof barrier function while allowing the spacers to create ventilation pathways, thus mediating between the conflicting requirements of moisture protection and moisture evacuation.
2Shape
If natural stone ridge tiles are hewed from solid stone, then aesthetic appearance is achieved, but the manufacturing process is laborious and expensive
Solution Approach 1:
Instead of hewing ridge tiles from solid natural stone, the invention uses natural stone slabs that are bonded together to form the ridge. This copying approach replicates the aesthetic appearance of traditional hewed stone ridges while using a more efficient manufacturing process that involves bonding pre-cut slabs rather than carving from solid blocks.
Solution Approach 2:
The ridge is constructed as a composite structure using natural stone slabs bonded together with adhesive, rather than being carved from a single piece of stone. This composite construction method maintains the natural stone aesthetic while significantly reducing manufacturing complexity and cost.
3Ease of manufacture
If replica stone ridges are used as alternatives to natural stone, then manufacturing cost is reduced, but the lifespan is shorter and they wash out over time
Solution Approach 1:
The invention changes the material parameter from replica stone (concrete or composite materials) to natural stone slabs. This parameter change fundamentally improves durability and lifespan while maintaining reasonable manufacturing costs through the bonding construction method.
Solution Approach 2:
The ridge system uses a composite construction with natural stone slabs bonded together and sealed with GRP liner. This composite approach provides the durability of natural stone while using bonding techniques that are more cost-effective than traditional hewing methods.
4Strength
If the ridge is set in place using cement mortar, then mechanical fixation is achieved, but ventilation requirements are not met
Solution Approach 1:
The fixation system is segmented into mechanical fixings (screws or clips) that attach the ridge to the roof structure, separate from the ventilation function provided by spacers and channels. This segmentation allows both strong mechanical fixation and adequate ventilation to coexist.
Solution Approach 2:
The invention replaces the cement mortar bonding system with a mechanical fixing system using screws, clips, or other fasteners. This substitution eliminates the moisture-trapping cement while providing secure mechanical attachment, and allows integration of ventilation pathways through the ridge structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a durable, aesthetically pleasing, and ventilated natural stone ridge that complies with planning regulations, reducing moisture levels and extending the lifespan of the ridge by using a strong, corrosion-resistant GRP liner and secure mechanical fixation.
Implementation Method 1
at least a pair of flat natural stone slates bonded one to another along their mitred edges to define a ridge, characterised in that the ridge overlays a rigid waterproof backing formed by a glass-reinforced polyester (GRP) liner
Implementation Method 2
At least one spacer is located at or adjacent each lower edge of the slates to space the lower edge from a surface on which the slates rest to define an opening for ventilating the apex of an installed roof structure
Data Source
Figure 1~2
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AI summary
The present invention provides a ridge mounting and ventilation system that utilises at least one pair of flat natural stone in conjunction with glass-reinforced polyester (GRP or similar) and a mounting system to form a modern, ventilated, high performance ridge that faithfully emulates a traditionally hewed stone ride and yet can be mechanically fixed and provide ventilation to the apex of an installed roof structure.