Frequently Asked Questions

Here is an ever-expanding list of frequently asked questions about SIPs (structural insulated panels). Most have come from our pervious clients or visitors to this website. If you have a question about SIPs, and you don't see it here, please use the contact form at the bottom of this page to submit your question. Some will get back to you asap.


Q. How new is SIPs technology?
SIPs (structural insulated panel system) has been used in domestic and commercial building projects in America since the 1950`s.

Q. When was it first introduced to the UK?
SIPs have been used for construction in the UK for the past 15 years, with its popularity exploding over the past 3 years.

Q. Are SIPs panels safe in the event of a fire?
SIPs panels have passed every required fire test in domestic and commercial building project

Q. Does the SIP building system need a vapour barrier?
SIPs panel constructions do not need a vapour barrier, though it is good practice to install either conventional polythene or foil backed boards.

Q. What is the U value?
U value is the measurement of heat loss through roof, external walls and ground floor. The lower the U value, the more energy efficient the property.

Q. Are SIPs environmentally friendly?
Yes, less gaps and air leakages creates a warmer property that is easier to heat and retain the warmth within. Q. How long will a building made with SIPs panels last?
Construction industry dictates that buildings must last for a minimum of 60 years and SIPs meet all the requirements.

Q. Why should I use TQS and not an architect to design my SIPs building?
TQS will design and detail a property with SIPs in mind and therefore tailor the construction to make best use of panels with minimum waste.

Q. Do you offer a construction service as well as design services?
TQS works alongside many companies who specialise in engineering and installation of SIPs panels.

Q. What software do you use to produce the design and plans?
TQS has tried many CAD packages over the years in both SIPs construction and engineering, the best package we found that gives accurate results and 3D presentation arrangements is Autodesk Inventor

Q. What are the options for external finishes?
External finishes are numerous and come down to customer choice, you can have traditional cavity and brick or stone wall, many types of rendering, brick slips and cladding with timber, slate, metal sheets etc.

Q. Is it difficult to get planning approval when using SIPs?
SIPs is an accepted form of construction and raises no issues with attaining planning approval.

Q. What warranties are available on a SIPs building?
Warranties on SIPs construction are accepted by all companies that offer warranty schemes.

Q. What is Part L and when will it be introduced?
Part L of building regulations relates to efficiency of properties in relation to heat loss etc and will come into force this year.

Q. What foundation should be used for a SIPs house?
Any foundation method may be used with SIPs, but ensure that tolerance is recommended to be +/- 5mm to ensure correct erection to SIPs panels.

Q. What is thermal bridging?
Thermal bridging is the ability of external cold transfer to internal walls that can result in cold spots and damp. SIPs panels having an insulated core virtually eliminate cold bridging.

Q. What heating system should I use?
Any heating system is acceptable for a SIPs construction, but needs to be downsized due to air tightness and efficiency of a SIPs building.

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