BUILDTOG Arras – 15 dwellings Presentation of the call for tender
1. Tender documents Architect ( Idem Concept ) + Thermal engineer Technical engineer ( Cochet Dehaene ) ( Energelio ) -Technical description (CCTP) -Thermal calculation for French regulation -Plans - PHPP calculation - Details link to the passivhaus certification - Short presentation of the passivhaus - Details for the project Control office’s check ( bureau de contrôle ) BASF’s check (not in the tender) TENDER DOCUMENTS Lots of people who have to work together = - Issue of coordination (timing and limits) - Issue of liability (who is responsible for what?)
2. Call for tender Publication of the call : 21th Octobre 2014 Deadline for proposal : 26th Novembre 2014 First tenders’s commission : 27th Novembre 2014 Criterias : Price (40%), Technical solutions (36%), Garanties (12%), Protection of the environment (12%) 8 groups of work with one for the structural work (basement, walls, roof, windows, external insulation = building envelope) Price to reach : 1 640 000 € without taxes GROUP 1 GROUP 2 GROUP 3 GROUP 4 GROUP 5 GROUP 6 GROUP 7 GROUP 8 Car park and Interior Plumbing and Paint and Structural work Plastering Electricity Tile external joinery heating floors networks 1 100 601 € 38 787 € 48 896 € 75 704 € 18 203 € 178 402 € 68 585 € 133 724 € Lowest cost ( € HT) 1 662 902 € +1,3% / price to reach
3. Analysis of the proposals Step one : How to be sure that the company is able to achieve the work specially for the passiv details? -References and means of the company -Analysis of the company’s technical offer in detail (what kind of insulation, how is it fixed, what kind of windows …) and questions to the companies Second tender’s commission : 29th January 2015 GROUP 1 GROUP 2 GROUP 3 GROUP 4 GROUP 5 GROUP 6 GROUP 7 GROUP 8 Structural Interior Plumbing Paint and Car park and Plastering Electricity Tile work joinery and heating floors external networks 1 100 601 € 38 787 € 48 896 € 75 704 € 18 203 € 178 402 € 68 585 € 133 724 € Lowest prices ( € HT) 27/11/2014 1 662 902 € 1 365 893 € 43 877 € 52 813 € 75 704 € 18 203 € 178 402 € 74 000 € 133 724 € Best prices ( € HT) 29/01/2015 1 942 616 € +18,3% / price to reach
4. Negociation… Step two : How to reach the price and be sure that the building will be a passivhaus building ? Meeting with the first three companies concerning the structural work to have an open discussion about the aims of the project and technical details (subcontractors, planning, technical solutions, price …). -Optimizations proposed by the technical engineer : -Removal of the green roof -Removal of the external blinds on the north facade (internal blinds in the bedrooms), -Reduction of the common spaces and the skylight, -Replacing of the material used for the common spaces. -Optimizations proposed by the company : - Replacing of the windows without changing their performance (PVC instead of wood), -Replacing of the blinds. Analysis by the technical engineer. Third tender’s commission : 26th February 2015 GROUP 1 GROUP 2 GROUP 3 GROUP 4 GROUP 5 GROUP 6 GROUP 7 GROUP 8 Car park and Interior Plumbing and Paint and Structural work Plastering Electricity Tile external joinery heating floors networks 1 100 601 € 38 787 € 48 896 € 75 704 € 18 203 € 178 402 € 68 585 € 133 724 € Lowest prices ( € HT) 1 662 902 € Best prices ( € HT) 1 365 893 € 43 877 € 52 813 € 75 704 € 18 203 € 178 402 € 74 000 € 133 724 € 29/01/2015 1 942 616 € Best prices ( € HT) 1 200 000,00 € 42 999,46 € 51 272,00 € 74 204,49 € 17 839,15 € 176 500,00 € 72 500,00 € 133 724,10 € 26/02/2015 1 769 039,20 € +7,8% / price to reach
4. Conclusion More work and more time for making the call of tender ‘s documents More work and more time for analysing the offers of the companies The companies have well understood what are the key points of the project. We have had lots of proposals and the technical proposals of the company were quite good and relevant . At the end, the project is more expensive that what we hope but still cheaper compared to the very last estimation made by the technical engineer. THANK YOU !
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