FAQS on SIPS

What are SIPS?

SIPS is an acronym for Structural Insulated Panel System. Joining high performance rigid polyurethane foam insulation to oriented strand board, (OSB), produces these engineered building components. For some applications SIPS can be faced with cement particle board [CPB]. The result is a building product that is predictable, resource efficient and cost effective. SIPS are used as floors, walls and roofs on all types of buildings.

Why are SIPS so much better?

SIPS out perform other building methods in virtually every category because the insulation is a component of a system, rather than an addition. SIPS are a structural composite like an 'I'-beam. The two faces act like the flanges and the rigid core is similar to the web. In short, the three components work together, rather than against one another. This composite assembly yields stiffness, strength and predictable responses. Not only do test results show panels are stronger, but real life natural disasters have proven it time and again.

Are SIPS new?

SIPS have been used and improved in the USA, Japan and Canada since the 1950's, and are not a new untried method of building homes. Our partners SBS have been manufacturing SIPS for several years and adapting and improving the technology to meet the needs of the stringent UK market..

Why are SIPS not more popular?

Simply a lack of awareness and the conservative nature of the UK building industry has held back the introduction of SIPS. However, higher insulation standards driven by the Building Regulations and the importance of sustainable building methods has made people look to SIPS as the most economical method of meeting new requirements. U-values as low as 0.10 W/m2K can be achieved in walls and roofs using SIPS which means the system can easily meet the values expected to be set in the new Building Regulations in 2005 and beyond.

Why are SIPS environmentally friendly?

• SIPs buildings are more energy efficient, stronger, more quiet and draft free than older technology systems, like timber framing. Less air movement or leakage translates into less drafts, fewer penetrations for noise, lower energy bills and a significantly more comfortable and controllable indoor environment. The result is lower energy consumption and CO2 emissions.
• Factory made with minimal site wastage and less landfill use
• OSB is made from sustainable harvested spruce, thinning and managed plantations.
• Up to 35% less raw timber use in SIPS buildings.

How much are they?

All things considered, SIPS generally cost about the same as conventional building materials but result in a building with better performance and utilisation of space. A building with SIPS for the roof allows the roof space to be fully used.

How do SIPs react to fire?

SIPS have passed every Standard fire test that is required. A key element of fire safety is protection of the SIPS and any other underlying structure with thermal barriers like gypsum wallboard.

How do SIPS save so much labour?

SIPS are manufactured efficiently and to high quality and accuracy in SBS's factory. They are transported direct to site in much larger dimensional sizes than other building materials. The building is weather proof, faster and other subcontractors can get a head start on the work that needs to be done.

What are the options for external finishes?

Almost total choice from bricks, natural stone, brick tiles, polymer and cement renders, timber cladding and metal cladding.

Who can design SIPS?

Professionals are increasingly aware of SIPS and there should be no problem designing a building from scratch to use SIPS or modifying an existing design. SIP Buildf and its technical partner SBS will be happy to provide advice to professionals and self builders.

Is planning a problem with SIPS?

SIPS is an accepted building technology and will not cause problems with planning approval. In the same way a well detailed and engineered SIPS design will not raise difficulties with building control. SIP Build is always available to give advice.

Are SIPS houses covered by warranty schemes?

All the companies offering warranty schemes accept SIPS construction. A well-designed and constructed SIPS house should have a life expectancy equal to present types of construction. Most lenders are able to offer mortgages on SIPS houses.

What foundation should be used?

Any construction can be used but the tolerance to level must be =/- 5mm to ensure the most efficient erection of the SIPS panels.

What is the best heating system for a SIPS house?

Any conventional heating system can be used but should be down-sized because SIPS houses are so energy efficient. Controls are important as heating demand can be low or negligible and overheating can occur.