Fiber Cement Sheet for Wet Area Flooring Installation
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Solution Overview
Problem
In residential construction, particularly in wet areas, the existing methods of using wood-based sub-floors and underlayment for tile installation are time-consuming, labor-intensive, and prone to water damage, with the wood sub-floor's dimensional instability affecting tile adhesion and structural integrity.
Innovation Solution
A single, lightweight, and strong fiber cement sheet is used directly on floor joists, eliminating the need for a sub-floor and underlayment, providing a waterproof and dimensionally stable surface for tile installation, with a composition of a cementitious matrix, cellulose fibers, and specific additives that meet structural load requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wood-based sub-floor and underlayment are used separately for wet area flooring, then tile installation is possible, but installation time and labor costs increase
Solution Approach 1:
The patent combines the sub-floor and underlayment functions into a single fiber cement building sheet that provides both structural support and water resistance, eliminating the need for separate installation of multiple layers and reducing labor time
Solution Approach 2:
The fiber cement building sheet serves multiple functions simultaneously: it acts as the structural sub-floor, provides water resistance, offers dimensional stability, and serves as the underlayment base for tile installation, making it a universal solution for wet area flooring
2Stability of the object's composition
If wood sub-floor is used, then flooring structure is created, but dimensional instability affects tile adhesion
Solution Approach 1:
The patent changes the material parameters from wood-based products to fiber cement composition, which has inherently superior dimensional stability and resistance to moisture-induced deformation, ensuring consistent tile adhesion in wet areas
3Object-affected harmful factors
If fiber-reinforced cement underlayment is used for water resistance, then moisture barrier is provided, but water penetration may occur if not installed correctly
Solution Approach 1:
The patent uses a composite fiber cement material that integrates cellulose fibers within a cementitious matrix, creating an inherently water-resistant structure that does not rely on proper installation techniques to achieve waterproofing, thereby ensuring reliable moisture protection
4Loss of time
If single fiber cement sheet is used, then installation time is reduced, but material composition complexity increases
Solution Approach 1:
The patent incorporates cellulose fibers locally within the cementitious matrix at specific concentrations to enhance tensile strength and water resistance, achieving the desired performance with a targeted composite composition rather than uniformly complex materials throughout
Data Source
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AI summary
A structural fiber cement sheet containing cementitious matrix and reinforcing cellulose fibers distributed throughout the matrix having a dry density less than 1.25 g/cm3, a thickness less than 0.7500 in, and able to withstand uniform loads of 200 psf or greater according to test method of Section 6.4.2.4 of PS2 and with a deflection of less than 0.067 inches at 60 psf when spaced on a span of 24 inches or less on center.