LIME PLASTER
Heritage Mineral Finish for Vertical Surfaces and Wet Zones
The organic beauty of seamless stone creates timeless luxury in bathrooms and architectural wet zones. Yet, long-term durability depends on material physics. While heavy-duty, resin-sealed systems belong on horizontal floors, vertical walls thrive on breathability. True lime plaster offers a pure mineral finish designed specifically for walls—handling water, vapor, and time naturally.
Material Physics: Walls Versus Floors
True Lime Plaster and the Need for Wall Breathability
In high-humidity spaces like bathrooms, vertical walls operate under entirely different physical laws than floors. True lime plaster provides a vapor-permeable mineral surface designed to handle moisture and vapor naturally through structural breathing, eliminating the need for artificial plastic barriers.
The Moisture Trap of Sealed Wall Finishes
When vertical walls are sealed in heavy polyurethane, epoxy, or plastic films, ambient humidity and vapor get trapped behind the surface. Over time, this leads to internal pressure, blistering, and hidden degradation that homeowners cannot easily fix on their own.
Reserving Microcement for DRY Horizontal Surfaces
This distinction defines where each material belongs. Microcement is an engineering masterpiece for floors in dry areas, where heavy foot traffic and physical impact demand a rigid, resin-sealed durability. On vertical walls, however, true lime plaster remains the uncompromised standard for breathability and moisture management.
Formulated In-House: The Science of Pure Mineral Plaster
100% Resin-Free and Cement-Free
We reject synthetic shortcuts. Our lime plaster is assembled in-house using a precise, balanced matrix of natural slaked lime, active pozzolans, and carefully selected sands. By eliminating petroleum-derived resins and heavy Portland cement entirely, we preserve the material's native integrity and health.
Natural Pozzolanic Strength for Wet Zones
To achieve reliability in wet areas without cheating with artificial polymers, we harness natural pozzolans. These reactive materials bond with lime to create a natural hydraulic set, allowing the plaster to harden securely and handle direct water exposure while maintaining total vapor permeability.
Permanent Chemical Sealing vs. Superficial Coatings
Maximum bathroom performance is unlocked using the traditional lime-soap sealing method. When applied to true mineral plaster, the soap reacts with free calcium to precipitate calcium stearate—an insoluble, hydrophobic compound integrated directly into the surface matrix. Unlike synthetic sealers that merely form a temporary plastic film sitting on top, this chemical reaction creates a permanent, breathable barrier. Because commercial "synthetic lime" plasters are choked with resins, this reaction cannot occur, leaving soap stranded as a superficial film that traps humidity and invites mold.
Water Dynamics and Maintenance: Isolation vs. Breathability
Simple, Stress-Free Cleaning
Any light-toned mineral wall in a bathroom will naturally encounter everyday marks, water spots, or soap residue over time. True lime plaster is designed for straightforward maintenance. Homeowners can clean surfaces easily using gentle, natural methods—such as pH-neutral or enzyme-based cleaners that safely break down organic residues without harming the mineral matrix.
The Illusion of the 100% Seal
Microcement and synthetic wall systems rely entirely on isolation: sealing the wall behind a non-porous resin barrier. Theoretically, if that seal remains 100% flawless forever, it works. But in a bathroom where water is omnipresent, the odds of a microscopic breach are absolute over time. Once water bypasses a non-breathable barrier, it gets permanently trapped—manifesting as stubborn water marks, peeling, and unsightly bubbling. True lime plaster operates on a different principle—what goes in can go out through natural vapor diffusion.
Waterproof Yet Breathable: The Mineral Advantage
Many assume that a surface must be completely sealed off to be waterproof. Microcement achieves waterproofing by acting as a two-way rigid shield—locking water and vapor out from the front, but equally trapping any moisture that enters from behind. True lime plaster operates on a smarter physics: it sheds liquid water effortlessly on the surface while remaining fully vapor-permeable. This allows the wall to breathe and dry naturally in both directions, delivering true wet-zone protection without risking trapped humidity or structural failure.
The Application Process: From Substrate to Finish
Substrate Preparation and Stabilization
Every successful installation begins beneath the surface. We thoroughly inspect, prep, and prime the substrate to ensure absolute structural stability, correct suction rates, and a flawless bonding foundation for the mineral layers.
Multi-Layered Hand Application
Using our in-house formulated blend of slaked lime and active pozzolans, our skilled application team builds the finish through precise hand-trowel layers. Each layer is meticulously compacted during application, pressing the aggregate tight, closing surface pores, and hardening the material into a dense, stone-like skin with rich depth and organic movement.
The Three-Step Wet-Zone Sealing Protocol
For bathrooms and wet zones, we apply a rigorous three-tier sealing system. First, specialized soap reacts with free calcium to precipitate insoluble calcium stearate into the surface pores. Second, a breathable siloxane-based water repellent is applied for deep hydrophobic protection. Finally, a coat of natural beeswax is integrated to ensure exceptional water beading and long-term durability.
COMMISSION YOUR PROJECT
Elevate Your Architectural Surfaces
Bring the authentic beauty and breathable durability of true mineral lime plaster to your next residential bathroom or commercial wet zone. Because every project is unique, our team collaborates closely with design professionals and homeowners from specification to final handover.
Connect With Our Studio
Contact our team to discuss project requirements, review physical sample boards at our showroom, or schedule a professional consultation and site assessment for your upcoming vertical wall installations.
top 5 Frequently Asked Questions
Q: What is the difference between lime plaster and limewash paint? A: Lime plaster is a 2-3mm coating while limewash paint is less 0.5mm thick. Essentially it means lime plaster is more durable and it can be used to make old walls look new. Limewash is a thin coating, so it cannot level old walls, and requires a skim coat plaster application before that.
Q: How do I maintain lime plaster? A: You can use a damp cloth and mild detergent for everyday general cleaning. For deeper stains, you can use a fine sandpaper, around #400 grit or finer. For bathrooms walls, we recommend once a year to reseal the walls. For fuss-free, you can engage us directly for our "clean and seal" service
Q: Can I use lime plaster for floors? A: Theoretically, yes you can. But practically, you should not as lime sets slow, over months. Furthermore, you can't add a clear protective coat as it will disrupt the curing process.
Q: Do you have a catalog? A: No we don't. Aftertouch is a bespoke applicator for hand applied finishes. We customize every single mix for each project, including the sand sizes and the lime:sand ratio, to achieve the target look. We highly encourage our clients not to limit themselves to catalogs, but to find an inspiration photo and share it with us. We will then use it as a base to customise our mix.
Q: What is soaping? A: Soaping is a traditional, but powerful method of sealing lime plaster finishes. The fatty acids in the soap reacts with the alkaline calcium hydroxide in lime, to form calcium stearate which protects your walls from within. After soaping your lime plastered walls, it becomes highly water repelling, but still breathable