What is SIPS Technology
Structural Insulated Panels (SIP) are the main component in a next generation, timber based construction system. Although still seen in the UK as a relatively new building technology, Structural Insulated Panel Systems (SIPS) have been successfully used in the UK since the late 90’s and around the world, particularly in the USA for more than 50 years and are now firmly established in the market place as a genuine alternative to more conventional, inefficient traditional building materials.
Ever increasing Building Regulations, the Code for Sustainable Homes, combined with increased energy costs confirms the consumer’s appetite for buildings that deliver much higher levels of energy efficiency. The Kingspan Building System is a very cost effective way of achieving compliance with the building fabric measures of the Code for Sustainable Homes and of exceeding the thermal requirement of the Building Regulations.
How is TEK made?
- TEK is the brand name for Kingspan Insulation Ltd’s (SIPS) Structural Insulated Panel System.
- TEK can be used to form wall and roof structures and is part of a whole house building system.
- TEK can be combined with other building components to form houses, schools, flats, offices, care homes, hotels and many other complex structures.
- TEK is an incredibly thermally efficient, super air tight building system.
- TEK is structurally robust.
- TEK is third party accredited and carries a BBA certificate as a complete building system.
What Are the Benefits of TEK
- TEK is typically used where high levels of thermal performance and air tightness are required by the architect, client or by the project.
You get incredibly low u values as standard, but with a much more slender wall / roof assembly.
- You benefit from dramatically reduced thermal bridging, predominantly due to the nature of SIPS but also due to the unique insulated panel jointing system and simple connection details.
Buildings constructed from TEK will ultimately benefit from low long term running costs.
- Enables maximum efficiency gains from renewable technologies such as MVHR, air source, ground source heat pumps etc
What is a U-Value?
- U-value is a measure of heat loss. It is expressed in W/m2k, and shows the amount of heat lost in watts (W) per square metre of material (for example wall, roof, floor etc.) when the temperature (k) outside is at least one degree lower. In a nutshell, the lower the u value, the better the insulation provided by the material.
- Kingspan TEK® delivers incredibly low U Values as standard.
What U-Values can be achieved by TEK
- TEK® has a u value range of between 0.20 W/m².k and 0.10 W/m².k
- TEK® is also a Passivhaus certified system. A building fabric specification for TEK® can developed to achieve the thermal, air permeability and (Ψ) psi value performance required in the design of Passivhaus.
What is a Ψ PSI Value (Spoken as Si)
- Changes to Approved Document Part-L Building Regulations in October 2010 have placed a greater emphasis on the impact of linear thermal bridges at junctions in the building fabric. These are expressed as Psi (Ψ) values.
- TEK® has Structurally Insulated Panels (SIPs) at its core and naturally achieves very good Ψ-values, due to the continuity of insulation at junctions and openings inherent in the System’s design.
Kingspan TEK® have modelled Ψ-values which can be provided to help building designers achieve the best possible DER calculations in SAP.
What is a U-Value
A U-value is calculated in SAP as the total sum of your (Ψ) (PSI) values multiplied by the total length of each junction detail in your dwelling. The lower the y-value, the less heat is lost.
What is SAP (Standard Assessment Procedure?)
- SAP works by assessing how much energy a dwelling will consume and how much carbon dioxide (CO2) will be emitted in delivering a defined level of comfort and service provision, based on standardised occupancy conditions.
- A SAP calculation takes data from you actual building design and uses it to assess Carbon emissions CO2 and the cost of energy used for heating, hot water and internal lighting, relates it back to the floor area and displays it as a number between 1 and 100+. The higher the number, the lower the buildings actual running costs will be, with 100 representing zero energy cost.
- It is possible to achieve a higher score than 100 with the use of renewable technologies such as PV, the energy of which can be exported to the national grid.
- SAP ratings are also displayed in a banding system, from A to G, similar to the stickers that you would see on a new electrical appliance. Band A properties are rated at 92 and above, Band B is in the range 81 to 91, and Band C in the range 69 to 80.
- A SAP calculation and EPC, Energy Performance Certificate will be required to prove that the new dwelling is compliant with part L1A of current building regulations.
- There are many factors that affect the SAP rating, here are a few key items.
The thermal efficiency of the structure
What level of air permeability will be achieved
How the building is going to be ventilated
The type(s) of fuel used to provide space heating, hot water and lighting.
The efficiency and control of heating systems
Solar gains through openings
Predicted Carbon Dioxide emissions
A fail on any one of the above elements will result in a fail for the building design overall.
An incredibly thermally efficient, air tight building system with minimal linear or repeated thermal bridging such as Kingspan TEK® from Point1 Building Systems can be used as a major component in the creation of a low or zero energy homes.
Will I need to use MVHR ?
- All new homes need a supply of fresh air, not just for the health and comfort of the occupants, but also to control condensation, remove pollutants, and to ensure the safe and efficient operation of various appliances. It is also a requirement of building regulations.
Traditionally, many UK dwellings have relied on natural / conventional air infiltration to provide ventilation such as window trickle vents, continuous eaves ventilation, extract fans etc. This however can result in excessive ventilation that increases energy consumption required for space heating, and can cause discomfort to occupants because of cold draughts.
- Energy loss due to ventilation accounts for approximately a fifth of space-heating energy demand in an older poorly insulated dwelling
The objective of a good ventilation strategy is, therefore, to provide a balance between energy efficiency and indoor air quality.
- A whole house MVHR system works by replacing the warm stale moist air from the house, with fresh air from outside. The fresh air passes through a highly efficient heat exchanger and is prewarmed by the heat which is recovered from the extracted stale air. Modern heat exchangers can recover between 70 – 98% heat from the outgoing stale air
- MVHR systems can also be specified to provide cooling during summer months whilst ensuring that the dwelling is always fed with clean, fresh, filtered ambient air.
When combined with an airtight thermally efficient building systems such as TEK® from Point1, MVHR dramatically reduces space-heating energy demand.
Is TEK suitable for use in Passivhaus applications?
The Kingspan TEK® Building System is a Passivhaus certified system and can be used in the creation of Zero Energy buildings.