Clay
The binder in many mixes: it glues sand and straw together and becomes hard once dry. Clay varies enormously, so every new soil is first tried out on small samples.
Materials
Materials
Natural materials are neither magical nor fussy; each simply has its own character. Clay holds its shape and binds fillers, straw lightens the mass and adds warmth, timber provides the frame, and lime and clay make a vapor-open finish. Almost all of them share one trait: they do not tolerate constant moisture. Below is a general overview of the main materials and the key rule without which any of them will quickly disappoint.
A clay wall need not fear rain that runs past it; what it fears is water that lingers.
How this section works: we describe materials in general terms, where they fit and where they struggle, without mix ratios, dimensions, calculations or costs. Whether a material suits your wall is decided by tests and by the professional responsible for the design.
What an eco-house is built from
The main natural materials and their role in the house.
Cob and light clay-straw
Clay mixed with straw and sand, either formed into blocks or packed into walls. The straw acts as a reinforcing filler and reduces weight. These walls dry slowly and need protection from water below and above.
Straw bales
Tightly compressed straw used as insulation or as infill for a frame. Bales must be dry when laid and stay dry for the life of the house, with plaster covering them on the outside.
Timber
Frame, floors, rafters and finishes. Timber likes air movement and cannot stand water trapped at end grain and in joints. Member sizes and spacing come from calculations, not habit.
Lime and clay plasters
Vapor-open coatings that let a wall release moisture outward. Clay plaster works well indoors, while lime plaster stands up to the weather better outside. Dense, impermeable paints on top usually keep the wall from breathing.
Types of repair (in Russian)
Natural insulation
Straw, wood fiber, reed and other plant-based materials. They need dryness, protection from rodents and neat, gap-free joints. How and with what to insulate a particular wall is decided in the design.
Articles for English-language readers
This is where standalone articles about natural materials, warm homes and their care will appear. We write them specifically for the English version and publish them once the text has been checked.
- Aion 2 farming: Useful Resources and Planning Tips
What farming means in Aion 2, which systems are confirmed after the global launch, how to plan sessions, and how to keep an account within the rules.
- Gaming Services, Player Time and Progression: An Industry Overview — Risks and Trade-Offs #1
A checklist-style framework for weighing gaming services: game mechanics, player choices, coordination, supply chains, account exposure and terms of service.
- Diablo IV: Lord of Hatred — Seasonal Planning
Field notes on planning Diablo IV play around Lord of Hatred: what is verified, what is not, the prerequisites to sort out, and realistic alternatives.
- The player’s guide to Marvel Rivals account progression: Online Service Comparisons
How progression works in Marvel Rivals in general terms, three common player scenarios, and a practical way to compare self-play, coaching and online services.
- GTA 6 News Tracking and Fact Checking: Editorial Overview
How to sort GTA 6 news into confirmed facts, commentary and rumor, what Rockstar and Take-Two have actually said, and a routine for checking new stories.
What we are working on now
- Light clay-straw or straw bales: choosing a wall system for cold winters
- Lime plaster in wet, rainy climates: what helps it last
- Deep porches and wide eaves: keeping walls dry where storms blow in sideways
- Clay floors and earthen finishes indoors: what to expect day to day
- Talking to your local building department about a natural-material house
Editorial rules
- Articles in this catalogue are written separately for each language version and are not translations.
- Some articles link to third-party websites, including gaming services; we do not control their content, prices or terms.
- We do not publish advertising for shops, construction firms or schools, rankings, prices or reviews.
The key rule: good boots and a good hat
Natural builders like to say that a house needs good boots and a good hat. The boots are a high plinth and a sound foundation that keep ground moisture and rain splash away from the clay and straw. The hat is a roof with wide overhangs that sheds water away from the walls.
The third part of the rule is a breathable finish. Lime or clay plaster lets moisture that gets into the wall escape outward, while a tight film or impermeable paint can lock it inside. It is this trapped moisture, rather than an occasional rain, that most often destroys such walls.
If you arrived via an old link about cob, here is the gist: it is a clay and straw mix that serves well when it is protected from constant moisture and built to a design calculated by a professional.
Strengths and weaknesses
| Material | Strengths | Watch out for |
|---|---|---|
| Clay and cob | Workability, a pleasant indoor climate, the chance to test local soil | Constant dampness, slow drying in cold weather, shrinkage cracks from a poor mix |
| Straw bales | Good insulation, light weight, simple hand work | Getting wet during installation, gaps at joints, rodents in open voids |
| Timber | A strong frame, familiar workmanship, a warm finish | Water trapped at end grain, poor ventilation, contact with damp ground |
| Lime plasters | Vapor permeability, durability outdoors with proper care | Working without gloves and goggles: fresh lime is caustic |
| Clay plasters | Vapor permeability, a soft texture, easy touch-up repairs | Direct rain and splash outdoors without protection |
Read next
- How-to
A test clay mix, checking a wall for moisture and refreshing clay plaster, step by step and in general terms.
- Planning
The order of works from idea and plot to final inspection: local rules, a professional design, the wet-work season and your budget of time and energy.
- Care
Caring for a natural-material house: water and walls, cracks, refreshing finishes, ventilation and the after-winter walk-around.
What we rely on
- General knowledge about building with natural materials
- Make Stroy editorial materials
Make Stroy retells widely accepted knowledge about building with clay, straw, timber and lime in its own words, without mix ratios, dimensions or calculations. Load-bearing structures, the foundation and the roof are designed and calculated by a professional; stoves, chimneys, wiring and gas are handled only by professionals. Look up your local building and fire rules before the first shovel goes into the ground, because the rules differ by country.