Build time
SIP · YORHUS50–100 daysAerated block6–8 monthsBrick8–12 months
Technology
YORHUS SIP house technology
What's inside a SIP panel
A SIP panel is a ready structural and insulated wall: two OSB-3 boards, EPS insulation inside, workshop geometry and joints designed for the specific project. For the client this means a slim warm wall, fast assembly and lower heating demand.
OSB-3Structural board
PolystyrenePPS-25F · insulation
OSB-3Structural board
174–224 mm
exterior wall thickness including OSB, insulation and structure
0.038 W/m·K
thermal conductivity of EPS-25F insulation inside the panel
B-s1,d0
reaction-to-fire class for certified materials and systems
Characteristics12 mm OSB-3 + 150–200 mm EPS + 12 mm OSB-3
Each layer has a clear role: stiffness, thermal insulation and stable geometry.
AdvantagesWorkshop-made panel based on the project
Openings, joints and dimensions are prepared before assembly, with less adjustment on site.
BenefitsWarm, slim wall assembled fast
The client gets more usable area, lower heat loss and a house shell raised in days, not months.
Energy efficiency
A European approach to energy efficiency
Passive House · PHI
A home that barely spends energy on heat
The most energy-efficient homes in the world are built to the Passive House (PHI) standard — with a very low heating energy demand and stable thermal comfort.
We design on the same principle: energy efficiency is planned in from the start — not bolted on after the walls are already up.
What is Passive House?
One of the strictest standards in the world
Passive House is a global energy-efficiency standard. Its goal is simple: build the house so well and so airtight that the heating demand is minimal — without losing comfort.
- Very low heating demand
- Envelope airtightness
- Controlled ventilation with heat recovery
- Thermal-bridge reduction
- Verified energy performance
What is nZEB?
A nearly zero-energy building
nZEB (Nearly Zero-Energy Building) is the European standard for buildings with minimal energy consumption.
We apply nZEB and Passive House principles where the project calls for them. Certification, where required, is carried out separately by authorised specialists.
Technology comparison
SIP vs aerated block and brick
An honest comparison on the parameters that actually affect timeline, budget and comfort. No marketing — just facts.
Wall thickness
SIP · YORHUS17–22 cmAerated block40–50 cmBrick50–60 cm
Structure weight and foundation
SIP · YORHUSLight · lighter foundationAerated blockHeavy · reinforcedBrickVery heavy · massive
Energy efficiency
SIP · YORHUSA++Aerated blockMediumBrickLow
Values are averaged for a 120–150 m² house. Exact figures depend on the project and are fixed in the contract.
Thermal performance
Why SIP loses less heat
The ×26 comparison is a simple technical explanation: at the same thickness, we compare the insulation inside the panel with brick masonry. What matters to the client is the result — the house warms up quickly and uses less energy.
SIP panelλ 0.038 W/m·K
EPS insulation inside the panel
×26
Brickλ ≈ 1.0 W/m·K
masonry of the same thickness
* This is a calculated comparison between materials. The final house result depends on the project, panel thickness, joints, windows and ventilation.
Warms up fasterthe warm shell does not absorb heat like heavy masonry
More stable temperaturefewer thermal bridges and sudden changes
Lower billsthe final result depends on windows, ventilation, design and use
Fire safety
B-s1,d0
European reaction-to-fire class for certified materials and systems: limited fire spread, low smoke production and no flaming droplets.
Not only warm, but designed for safer details
In a SIP house, fire safety is not solved by one material alone. We check the panel, timber, adhesive, installation foam and joints, then close vulnerable points through design and assembly.
Timber treated with flame retardantsTimber elements receive fire-protection treatment according to technical data sheets.
OSB and panelWe use boards and systems with declared reaction-to-fire performance; certified B-s1,d0 solutions limit flame spread.
Adhesive and foamProfessional fire-retardant adhesives and foams selected by technical data and field of application.
Joint controlWe seal joints, protect penetrations and check areas where fire could receive air or fuel.
Important: B-s1,d0 is the reaction to fire of the tested product or system, not a promise that the entire building is non-combustible. Material documents are checked for each project.
Reliability
Structural reliability
500kg/m²
Load capacity
The structure can be designed for loads of up to 500 kg/m², depending on the structural element and project solution.
✓
Accurate panel geometry
Factory production ensures accurate geometry and tight joints.
✓
Joints per project
Structural connections are designed for the specific house.
✓
Accurate factory geometry
Panels are manufactured to the design with high precision.
Frequent questions
Frequent questions about SIP houses
We answer the most common questions about modern construction technology — clear answers based on technical solutions.
01Won't a SIP house burn down?
Yes, we treat this separately. The fire-safety block above explains it: timber is treated with flame retardants, OSB, adhesives and installation foam are selected by declared fire-protection characteristics, and vulnerable joints are closed through design and assembly. B-s1,d0 applies to certified materials and systems within their field of application.
02How long does such a house last?
With proper construction technology, moisture protection and correct use, a SIP house lasts over 50 years. The technology has been used successfully in North America and Europe for decades. We provide a 10-year warranty on the load-bearing structure.
03What about mice and rodents?
Rodents appear where there is access inside the structure. So during construction we seal all junctions, protect potential entry points and install a metal anti-mouse mesh. Mice also do not feed on polystyrene. The advantage of SIP is that every joint can be fully controlled and protected during assembly.
04Will it be hot in summer?
No. The energy-efficient envelope works both ways: in winter it keeps heat inside, in summer it blocks heat from getting in. Combined with modern ventilation, quality windows and sun protection, the house keeps a comfortable temperature year-round with minimal energy use.
05Does it need ventilation?
Yes. An airtight house is designed with ventilation — fresh air without heat loss.
06Can a house be built to nZEB or Passive House standard?
Yes. The airtightness and energy efficiency of SIP structures make this technology one of the most suitable for nZEB and Passive House homes. That means higher comfort, a stable microclimate and far lower heating and cooling costs over the whole service life.
Online calculator
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