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Tender does it....!

mike2016

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I received the tender documents from the Architect last Friday, about 4 weeks later than I'd hoped. Still it had around 12 documents and a cover letter for me to absorb and read over the weekend. They provided all the details the builders need to price the job which is a lot of detail, wall makeup, foundation and roof elements and I finally get a preview of different cross sections of the house. They provided a window and door schedule, room elevations including a design for the kitchen, utility room, under stairs storage and more. A MVHR layout and Electrical plan was also provided. I've to tweak a few things of course but so far not so bad. 

We had discussed my preference for a KORE passive slab and Aquapanel / K-Rend exterior back in August but they've gone for a kingspan foundation and blockwork on the outside. Also Climawool which is a bit cheaper. I've to send them feedback and see why they went this route but it was a bit suprising to say the least. Fermacell was my choice for the interior. 

 

EXTERNAL WALL BUILD UP
515MM INCLUDING PLASTER (U VALUE 0.1 W/(m2K))
20MM EXTERNAL COLOURED RENDER FINISH
100MM BLOCKWORK EXTERNAL LEAF OR BRICK
50mm VENTILATED CAVITY. BREATHER MEMBRANE ON
10mm DIFFUSABLE RACKING BOARD
220mm TIMBER FRAME WITH 220mm CLIMAWOOL / MOY METAC
INSULATION (0.032W/mK) FITTED TIGHTLY WITHIN THE TIMBER
FRAME, 50mm KINGSPAN KOOLTHERM K106 (0.022W/mK) FIXED TO
TIMBER FRAME.
AIRTIGHT MEMBRANE (INTELLO OR EQUIVALENT APPROVED)
50mm TIMBER BATTENS TO FORM SERVICE ZONE, FILLED BETWEEN
WITH CLIMAWOOL / MOY METAC INSULATION (0.032 W/(mK))
15mm FERMACELL AND SKIM FINISH.

 

GROUND FLOOR BUILD-UP (U VALUE 0.070 W/(m2K))
75MM CONCRETE SCREED ON
280MM KINGSPAN KOOLTHERM INSULATION (0.020W/mK) WITH 60MM
VERTICAL UPSTAND TO ALL EDGES ON
RADON BARRIER ON
150MM CONCRETE SLAB ON
50MM SAND BLINDING ON
MIN. 150MM COMPACTED HARDCORE

 

Now it's a matter of working through 3 pages of notes and comments I'm sending them back and agreeing the final tender specs. They have a few builders lined up who expressed an interest and I've three of my own. Hopefully we'll get prices before Xmas and I can get cracking in January. I've to sell my own house but need some groundworks done before I put it on the market as the new house is next door and access to water/broadband etc and new car parking spaces have to be provided. Bit of a juggling match! 

 

Still not sure on a few options including the heating system, simple would be better but Irish regulations are being updated shortly and you have to tick the box or else! And someone has to sign the piece of paper too. Lots of paper signing over here! No inspections at all which is funny! So, hopefully next post will be wailing over the price of building and how many zero's it will cost me!! 

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Odd one - Fermacell doesn’t need a skim finish, it’s done with FST. You ‘can’ skim it but to do so you need to prep it properly and it’s pretty pointless as the finish is near perfect with filler and FST. 

 

If  you want to keep the sound insulation and reduce cost then go with sound block plasterboard and skim. 

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