Newbie Here From Leicestershire. Question: SIP, Timber Frame Or A Hybrid For A New Build Dormer-Bungalow?
Posted 26 November 2015 - 10:28 PM
Posted 26 November 2015 - 10:40 PM
I've had a quote from them too, good spec but it came in higher price the the SIPs 172. It's probably due to the distance and accommodation costs I guess.
I've not got a garage for this house yet, I was thinking I may attempt the erection of that myself using SIPs after seeing the house put up. I too have about 30 mSq of flat roof, I will need to find a good solution for that (on this forum hopefully) too.
Posted 26 November 2015 - 10:47 PM
I m currently thinking single ply epdm for flat roof and have a quote for this. I like the sound of the metal options such as Tata but I can't find a local installer and Tata themselves hav nt bothered coming back to me which is a shame.
Posted 27 November 2015 - 08:50 AM
Our house is smaller at 130m2, but room in roof so slightly more costly structurally.
The lowest frame only quote we had (SIPs) that we had was £49k, but that was for bare 142mm SIPs with a very poor U value, around 0.18 for the walls and 0.19 for the roof, IIRC. Adding an insulated foundation increased that to about £59k, adding the UFH pipes bumped it to around £60k, adding in crane hire etc bumped it to around £61k. Adding additional external insulation to get the wall and roof U value down to out minimum acceptable figure of 0.14 walls and 0.12 roof pushed the price up to around £70k. There were no guarantees and no airtightness measures at all, getting it airtight would have been down to me after the frame had been erected, and it's quite possible that I'd never have been able to achieve a satisfactory result. With airtightness tape alone costing £30 a 25m roll, and Isover membrane being pretty costly, getting it airtight could easily have added another couple of thousand to the price.
We did have other SIPs companies quoting for higher specs, but the very best was for wall U values of 0.15, and again their quotes didn't include the foundation system, airtightness or any plant hire. All were at least £10k more than the lowest quote, the highest was over £30k more.
MBC supplied us with a complete weather tight, insulated and airtight package, tested and guaranteed to under 0.6 ACH (ours was actually 0.43 ACH) and their quote included everything, foundation system, UFH pipes, build, insulation, plant hire, airtightness work, testing and a ten year guarantee, all for £53k (for the house, the detached garage was extra). This was for floor and roof U values of slightly under 0.1 and wall U value of 0.12, and used a high decrement delay insulation (Warmcell), which has proved to be excellent, not only at controlling the thermal time constant but it is also an extremely good acoustic insulator as well (this surprised us a lot).
I understand that MBC had to increase prices because of material cost increases, but it was reported here that the increase was around 15%, which would have pushed our price up to around £61k, about the same as the very much poorer specification cheap SIPs quote, that had no guarantee of anything.
Edited by jsharris, 27 November 2015 - 08:51 AM.
Posted 27 November 2015 - 02:09 PM
Posted 27 November 2015 - 03:06 PM
I'm a little gutted I can't not afford their price and their expertise. I will need to learn as much as possible and implement as many beneficial feature as I can afford.