SNT 2.01.03-98 PDF

Full title and description

SNT 2.01.03-98 — "Thermal engineering in construction" (СНТ 2.01.03-98, Строительная теплотехника). National technical norm addressing thermal design, calculation methods and normative values for heat protection of buildings and building elements.

Abstract

This standard defines principles, calculation methods and recommended design values used in the thermal engineering (heat protection) of buildings. It covers thermal resistance and transmittance of building envelope elements, methods for determining reduced thermal resistance for composite structures, treatment of thermal bridges, moisture and vapor transfer considerations affecting thermal performance, and climatic zoning for selection of design parameters. The document is intended to ensure adequate indoor thermal conditions, energy efficiency and durability of constructions through consistent thermal design rules.

General information

• Status: Adopted as SNT 2.01.03-98 (1998); historically used national technical norm for thermal engineering — consult the national standards registry for current legal status in your jurisdiction.
• Publication date: 1998 (designation suffix "-98" indicates the edition year).
• Publisher: National standards/technical regulations authority (issued under the SNT series used by national construction authorities; in practice distributed via the country's state standards/standardization body and construction ministries).
• ICS / categories: 91 (Construction). Relevant subfields: 91.100 (Construction materials) and 91.120.10 (Thermal insulation of buildings / protection of and in buildings).
• Edition / version: 1998 edition (SNT 2.01.03-98).
• Number of pages: Approximately 39 pages (typical published electronic edition).

Scope

SNT 2.01.03-98 applies to the thermal design of new and reconstructed buildings and their enclosing structures. It establishes calculation methods and normative (design) values for thermal resistance, thermal transmittance (U-values), specific heat capacity where required, and related parameters used to size and specify thermal insulation and to verify compliance with required heat protection. The standard addresses typical building elements (external walls, roofs, floors, windows and doors), composite constructions, thermal bridges, and the effect of moisture and vapor transfer on thermal behavior. Climatic zoning guidance is included for selection of design external temperatures and other climate-dependent values.

Key topics and requirements

• Definitions and basic thermal concepts for building engineering (thermal resistance, transmittance, surface coefficients).
• Methods to calculate thermal resistance and U-values for homogeneous and composite building elements.
• Rules for determining reduced thermal resistance of multi-layer constructions and assemblies.
• Treatment and calculation of linear thermal bridges and point thermal bridges; recommendations to limit heat loss through connections.
• Consideration of moisture transfer, vapor diffusion and condensation risk in envelope design.
• Climatic zoning and selection of design outdoor/indoor temperatures and humidity conditions for calculations.
• Recommended normative (design) values for material thermal properties and for elements' minimum thermal performance.
• Guidance for application of the standard in retrofit and energy-efficiency assessments.

Typical use and users

Used by architects, building engineers (structural, thermal and MEP engineers), energy assessors, building envelope designers, manufacturers of insulation materials, construction contractors and regulatory/expert bodies performing design review and compliance checks. Typical applications include: thermal calculations in architectural and engineering design, specification of insulation systems, energy-performance assessments, and preparation of documentation for building permits and technical expertise.

Related standards

Closely related and complementary documents include national and regional thermal protection codes and standards (other SNT/TDS series documents), legacy СНиП/STR regulations on thermal engineering and thermal protection of buildings, and international standards on thermal properties and calculation methods (examples: ISO/EN standards addressing thermal transmittance and calculation of building element thermal properties). Also used alongside standards for moisture control, acoustic protection, and energy-efficiency requirements in building codes.

Keywords

thermal engineering; heat protection; building envelope; thermal resistance; U‑value; R‑value; thermal bridge; vapor diffusion; condensation risk; insulation; climatic zoning; thermal transmittance; energy efficiency.

FAQ

Q: What is this standard?

A: SNT 2.01.03-98 is a national technical norm titled "Thermal engineering in construction" that sets out calculation methods, definitions and recommended design values for the thermal performance of buildings and building elements. It is the 1998 edition identified by the suffix "-98".

Q: What does it cover?

A: It covers methods to calculate thermal resistance and transmittance (U-values) of walls, roofs, floors, windows/doors and composite structures; treatment of thermal bridges; selection of climate-dependent design parameters; and considerations of moisture and vapor transfer that affect thermal behavior.

Q: Who typically uses it?

A: Architects, building and thermal engineers, energy assessors, insulation manufacturers, contractors, and regulatory/expertise bodies involved in the thermal design and assessment of buildings.

Q: Is it current or superseded?

A: The document is the 1998 edition of the SNT series. National practice in many countries evolves and similar SNT/STR/СНиП documents have in some places been updated or replaced by newer technical regulations or national codes. For legal or mandatory status, consult the current national standards/technical regulations registry or the national standards authority.

Q: Is it part of a series?

A: Yes — it forms part of the SNT series of construction norms (technical standards) addressing different aspects of building design and performance; related SNT documents cover topics such as acoustic design, structural rules and other building services.

Q: What are the key keywords?

A: Thermal engineering, heat protection, building envelope, insulation, thermal resistance, U‑value, thermal bridge, vapor diffusion, condensation, climatic zones, energy efficiency.