Bathrooms and other regularly wet areas need more care than a normal decorative wall. An appealing finish and the underlying water-management system serve different purposes. SurfaceTally can estimate quantities, but it cannot determine whether an assembly is waterproof or suitable for your project.
Define wet and dry locations separately
Create a simple plan that identifies shower areas, splash zones, dry walls, floors and joints. Different locations may require different product assemblies or installation details. Do not assume that an attractive wall material will automatically perform as waterproofing wherever it is used.
Ask for a complete system specification
Before making a shopping list, obtain the selected manufacturer's documented recommendations for your substrate and intended exposure. Establish the required preparation, compatible primers, reinforcement, waterproofing components, decorative materials and protective finishes where applicable. Confirm that the system and installer are appropriate for the building and local requirements.
Keep coverage units tied to their materials
Do not apply a plaster's stated kilograms-per-square-metre rate to a primer or sealer. Each component needs its own coverage figure and its own unit. Our primer and sealer calculator keeps the two liquid products separate, while the Tadelakt tool estimates a separate material quantity from your supplied consumption rate.
Be cautious about claims of waterproof finishes
Product marketing terms are not a substitute for technical instructions, substrate preparation, correct detailing around drains and penetrations, or compliance with applicable building requirements. Ask a qualified installer or designer to confirm the wet-area assembly rather than inferring performance from estimated product consumption.
Record the assumptions behind the estimate
Save the measured surfaces, product specifications and quotations together. If a professional changes the approved system, update the calculations for every affected component. A change to substrate preparation can require more than simply increasing a finish-product allowance.
Scope of our tools: They provide planning arithmetic from numbers you supply. They do not inspect site conditions, approve waterproofing systems or replace professional recommendations.