magutosh

Hi all, This post provides some information for anyone who might consider building a sip house. I've quoted 6 sip suppliers, one of which turned out to be a manufacturer, who simply forwarded our design to three approved installers. For a two storey, circa 200m2 house, the quotes ranges from £49,800 to £90,000+, excluding vat, more or less on similar terms, supply and erect, except the cheapest quote was based on 142mm panels for both roof and walls. The cheapest quote for 142mm wall panels and 172mm roof panels came in at £59950, interestingly, another approved installer of the same manufacturer quoted £90,000+. The quotes mainly came from suppliers in the northwest, with two from west midlands, majority of the figures came in around £60k, but only one shared lots of recent project photos and put me in touch with past clients. Hope you find those useful, I'll of course post updates along the journey.

Hi Russell, Can I please clarify that I can apply for demolition but need to wait for the replacement dwelling application approval before demolition can start? Thanks Dominic

Hi all, We are waiting for the planning decision, and came across the 6 week notice period for demos application. Do I need to wait for the planning application approval first before applying for demos Thanks!

If you can find out the material difference, that would be much appreciated. Yes, I will be doing as much as I can. Cheers!

All the suppliers seem to use Kingspan TEK system, so their thermal performances should be in line with one another? That's exactly what I want to avoid. I wonder which approach would be more time and cost effective, getting a thicker panel to begin with or add insulation later on, has anyone gone down either road and can share experiences? What target U value did you use? And how much energy does your house consume annually please? While understanding lower the U value, the better performance, what would be a good U value to draw the line? Is there anyway I can calculate by inputting wall, roof and window U values, size of the house, to get an idea of the thermal performance? Everything I read so far are quite technical, can anyone point me to a source where it translates to, say annual consumption or the likes? How much extra did the 70mm cost you including labour, do you recall? What's the total area you insulated? If I were to use 142 throughout, I was thinking internal insulation for the roof but external insulation for the walls, so the extra insulation would cover the sole plate, and I'm likely to use passive foundation to mitigate cold bridging from the bottom up. Yes, I'm thinking the same, since heat escapes the most through the roof, just need guidance on how good a performance/U value would be sufficient.

Hi, We've been getting different quotes from SIP suppliers for our rebuilt project. Most of them quoted 142mm for walls and 172mm for roof, but Clays quoted 142mm for both. Before I speak with them about it next week, what's your take on their respective thermal performances in the real world? What thickness should be considered for walls and roof? And has anyone calculated the cost difference of a thicker panel vs extra insulation later on? Thanks!

Hello everyone, I came across the forum when researching air source heat pump, only wish I found it sooner! We are at design stage of a 1920's bungalow remodelling, plan to turn it into a two storey house with open loft ceiling, add a rear extension as kitchen dining and social space. The first hurdle in front of us is the structure. Initially we thought about using SIP panels for the all the areas, to save time, achieve air tightness and energy efficiency, with potential higher cost. Having learned the design and manufacturing time frame would take 8 weeks, plus 2-3 weeks installation, we wonder if a more traditional brick, block work approach would be comparable, since the rear extension would only be 4 metres out? Is it better to build up the existing brick wall, fill the cavity before external clad / render, or add timber structure onto of existing wall and finish with SIP route? Has anyone walked down the same path before? Any experience you can share and advice to give? We have no experience with the build process, only the interiors, so any guidance would be greatly appreciated! Cheers Dominic