No heating in the attic?

[Coati84]

Hello,

After many hesitations, I decided: my heightening will be carried out with the following system "breeze blocks + loose cork granules + plasterboard brick". The configuration of this elevation does not allow a wooden frame unless you remove all the breeze blocks from the floor ... which is not financially possible.

Here are my other questions of the day:

1] I plan to install windows with standard double glazing 4/16/4 - solar factor of 0.73 - Ug <2.8 W / m2.K for "southern" orientations,
I plan to install windows with 4/16/4 double glazing with low emissivity face - solar factor of 0.66 - Ug <1.8 W / m2.K for all other orientations.

Is this idea of ​​putting standard double-glazing that does not include a low-emissive face on "south" oriented glazing a good one?
Will I be able to benefit from the tax credit for my wooden windows with Uw which must be less than 1.6 W / mK and for my bay windows in aluminum with Uw which must be less than 1.8 W / m2.K?
For a window replacement, the Official Tax Bulletin (BOI) only speaks of the Uw value and I do not necessarily want to fill my air space with argon gas. What do you think ?

2] A concrete formwork surrounds the conduit of my future and possible wood stove only in the currently unfinished attic. The duct does not exist on the ground floor but there is an opening in the attic floor. My question is as follows: should I now take care of any possible diversions from this existing conduit upstairs to the upstairs bedrooms? Or is the radiation from this vertical duct sufficient to heat the 4 upstairs bedrooms which will have the doors always open during the day?

Thank you in advance for your answers.

[Coati84]

Hello everybody

Here are my last 3 questions before entrusting the thermal design office with the detailed renovation program for my house:

1] after much thought, I intend to put in place:
- 4/16/4 double glazing with FE and with argon with an Ug of 1.2 W / m2.K and a solar factor of 0.64 on the east, west and north orientations,
- 4/16/4 double glazing with argon and without FE with a solar factor of 0.73 and an Ug to be determined on the south orientation.
Is this the right choice?

2] I am sure to achieve the insulation of the crawlers from above in blown cellulose wadding with a thickness of 27 cm and a density of 55 kg / m3. On the other hand, I am going to carry out the external insulation of my north facade with an insulation to choose and a wood cladding in autoclave Scots pine. From a performance / economic point of view, is it in my interest to put cellulose wadding by wet spraying instead of wood fiber? Do you have feedback?

3] Should I continue not to consider setting up a wood stove as a first step and waiting for the following winter to see if this additional means of heating is useful?

Thank you in advance for your comments.

I intend to make a very detailed descriptive memo of the work planned this WE and forward it to the thermal design office. The consulting engineer told me that he would use the PERRENOUD software.

[Coati84]

Hello,

I finally submitted my building permit in mid-January 2010; this must be accepted by the end of February 2010.



My architect will finish drafting the DCEs for the different lots so that I can proceed with the consultations in early April 2010.

I am taking this time to refine my financing plan and would like to share with you my first budget estimates for the "roof insulation" item with a total surface area of ​​155 m²:
- removal of the roof (tiles and battens) and storage of the tiles on site: 3 € HT [= 100 x 155]
- supply of wadding: € 2 excl. tax [= 865 x 155 x 0.28 x55]
- installation of the wadding: 3 100 € HT [= 155 x 20]
- supply and installation of a waterproof undercover: € 1 excluding tax [= 550 x 155]
- laying of tiles: € 2 excl. tax [= 325 x 155]
- installation of a ventilated partition at the ridge: 560 € HT [= 70 x 8]
- supply and installation of paneling fixed under the purlins (with accessories): € 6 excl. tax [= 975 x 155]
- supply and installation of a vapor barrier: € 1 excl. tax [= 550 x 155]
- preparation and installation of boxes l = 60 cm x L = 140 cm with the length of the boxes parallel to the direction of the slope: € 3 excl. tax [= 875 x 155]
- scaffolding: 600 € HT

The total cost of the "roof insulation" item would therefore be as follows: € 26 excluding tax, ie an average cost of € 500 excluding tax / m².

What do you think ? Am I right? My daily labor cost assumption is 330 - 340 € HT. Is it OK ?

See you later.

[Coati84]

Hello,

After some time of silence, I am happy to tell you that my building permit was accepted without any difficulties at the end of February 2010. I am currently working with the architect on the finalization of the final interior plans and the drafting of the DCEs for each of the lots (estimate, partial execution plans, etc.). I will consult the craftsmen in May 2010 for the completion of the work finally scheduled from February - March 2011.

Here are some details that bother me and I would like to hear from you:
- Should I remove or not the interior coating (10 cm thick plaster coating) from my "south" facade before installing the bay windows? This operation allows me to save 10 cm x 8 m of living space. Is it worth it?
- what interior paints do you recommend? I am starting to learn about the brands TOLLENS, FARROW AND BALL, CAPAROL with if possible less than 20 g of VOC / l. Does anyone have feedback to share?
- I intend to cover the first floor with solid Gascony pine parquet at a price of around 20 € / m² with an acoustic underlay. What do you think ?
- my heating piping network is obsolete because it is about 50 years old and the network is muddy. This network will be removed and the cast iron radiators will be kept. What efficient technical solutions do you recommend for changing networks? PER materials with channels in the floors or without channels and in the baseboards?
- what is the best technical and economic choice for the choice of materials for the pergola placed on the "south" facade: galvanized steel with primer and epoxy paint? Do i need galvanization? Can I put iron? The section of the pergola which will take up part of the load of the floor will be H [with a width of 200 mm]. Can the section of the pergola that will be purely decorative be a hollow square of 100 x 100 mm [with a thickness of 5 mm]? This should limit the sag and make this pergola thinner. What do you think ? I do not know this area well.
- do I have to install a humidity sensitive ventilation of class A or class B?
- the choice made for the partitions created is as follows: fermacell plates on metal frames and hemp wool / wood insulation [ISONAT + type].
- I intend to breathe cellulose wadding into the crawlers. For reasons of proximity, I intend to use BELL'OUATE [XYLOBELL] brand wadding made in 06. Does anyone have any feedback to share?
- ...

Thank you in advance for your answers in this near final phase of design.

I will keep you informed of the thermal study which must be communicated to me by the end of April 2010.

[Coati84]

Hello,

You will find the attached facade plan.



Thank you in advance for your contributions.

A problem has just fallen on me: my architect gave me a very light Business Consultation File (DCE). This DCE submitted is a simple extrapolation of the building permit plans and a vague estimate of the cost of the work.

I am sending him an AR letter today in which I recall my initial program and point out the discrepancies observed between the documents submitted and my initial program and the constructive principles adopted. I also specify the absence of detailed descriptions on a very large number of points.
Finally, I recall the scope of the missions related to the establishment of the DCE and indicated in paragraphs G 3.3.3 “PCG - general design project studies” and G 3.3.4.1 “Contracts consultation file” of the CCG works on existing downloadable on the site www.architects.org.
An ELD must include:
- a description of the detailed specifications of the structures in the form of a Cahier des Clauses Techniques Particulières (CCTP) comprising, for each trades, a written document describing the structures, specifying their technical specifications and setting the limits of each contract,
- plans, sections, elevations dimensioned to the sufficient scale, for each building, including all the significant details of architectural design at the appropriate scales,
- a framework for breaking down the offers of companies including a detailed descriptive estimate for each body of state,
- the principle program for the progress of the work,
- the foreseeable timetable for the progress of the operation,
- the estimated cost of the work.

I am appalled by the fact that with the elements he communicates to me, he attaches a payment term. Where are we going ?

Working in the field of purchasing and knowing quite well the field of construction, I worked at length on this letter AR. I really hope that everything will work out and that my very detailed AR letter will allow him to give me a DCE in accordance with the contract signed in 2009. Has anyone ever had this experience which prevented me from sleep for 3 days?
I am considering hypothesis n ° 2 where I would be obliged to terminate this architect's contract which ends at the end of the project mission and does not include the ACT phase and follow-up. Has anyone ever had this experience?

The more I advance, thanks in part to this forum, the more I meet craftsmen of a very good level, the more I am sure to carry out the project management mission myself.

Thank you for sharing your experiences.

[swift2540]

Hello,

I am considering hypothesis n ° 2 where I would be obliged to terminate this architect's contract which ends at the end of the project mission and does not include the ACT phase and follow-up. Has anyone ever had this experience?

The more I advance, thanks in part to this forum, the more I meet craftsmen of a very good level, the more I am sure to carry out the project management mission myself.

during renovations and being sure of my craftsmen, I had mandated the architect only for the plans and discussed the price before.
So everything was very clear and went very well.
However, to this day it would no longer be possible (says an architect); it is necessary to supervise the work ???
Inform yourself well on this point
@+

[Coati84]

Thank you swift2540.

I signed a study contract with phases 1 "Sketches - Draft Summary - Final Draft" and 2 "Project" in firm share and phase 3 "Assistance with works contracts - VISA - DET - AOR" in optional part.

I think I am protected and had my mail proofread by a work colleague who specializes in building renovation. Everything is a priori OK.

The cost of the firm part is 6% of the cost of the estimate, including 4% for phase 1 and 2% for phase 2.

Thank you for your interventions during this complicated period.

See you later.

[dedeleco]

The near absence of this DCE reminds me of memories of an architect who hardly provides any plans outside the building permit, refuses detailed plans (even for companies, which therefore forget elements), and poorly supervises poorly prepared work. which results in good workmanship: humidity and plaster with runs and cracks,
But how to distinguish the serious architects from the light ones is not obvious because the serious one on a past project can become light on another to earn a lot of money with its notoriety !!
It is the same with the lawyers responsible for defending you for the poor workmanship of the previous architect, who, nevertheless, was found totally responsible for his negligence by the courts after 7 years of trials and expertise !!!
Since the forensic expert only read the reports of insurance expert buddies, I should have paid more licensed insurance experts, even to copy my proofs of damage !!!!

Good luck, but I no longer trust the various stakeholders and I tend to achieve with my hands as much as possible, so I can only complain to myself about my mistakes, but thinking, concerned, I does less than lazy specialists !!

[Coati84]

Hello,

Thanks for the comments.

I am currently preparing my 2 scenarios:

hypothesis n ° 1 "the architect grows loudly but realizes what he is paid for:"
- a description of the detailed specifications of the works for each trades, a written document describing the works, specifying their technical specifications and setting the limits of each contract,
- plans, sections, elevations dimensioned to the sufficient scale, for each building, including all the significant details of architectural design at the appropriate scales,
- a framework for breaking down the offers of companies including a detailed descriptive estimate for each body of state,
- the principle program for the progress of the work,
- the foreseeable timetable for the progress of the operation,
- the estimated cost of the work.
This suits me very well, I keep the insurance related to the design work and I myself manage the contract with the thermal engineer allowing me to benefit from an eco-loan and especially the contract with the BET structure which will establish me the execution plans of the delicate points of my project.

hypothesis n ° 2 "the architect does not want to hear anything".
I am waiting for the absence of delivery of a finalized version of the DCE by the date that I have imposed on it. Obviously, I will not pay him a dime, contact the order of architects showing my very factual AR letter and the delivered DCE of very poor quality and terminate the contract for fault.
This suits me because I have a colleague who is able to write me this detailed DCE which is necessary for me to be able to carry out the consultations and especially to obtain solid technical offers and financially without provision.
However, I have doubts about the intellectual property of the work carried out by my architect and the ease of terminating a contract. For information, I have already paid him 2 terms of payment for a total amount of € 5 including tax and the project will fully comply with the facade plans accepted as part of the building permit instruction. Doesn't the fact that the work will consist mainly of modifying the interior plans protect me from a possible appeal by the architect?

Thank you in advance for your feedback.

[Coati84]

Hello,

After some time of silence, I take the time to give you news.

The thermal study is almost complete: the future consumption of my renovated house will be 109 kWh / m² / year instead of a consumption established in May 2009 - as part of the purchase of my house - at a value of 255 kWh / m² / year. The thermal engineer congratulated me on the choices considered coherent: strong insulation of the roof, external insulation of the "north" facade, thermal correction of the walls of the second floor, no heating upstairs ...

Last week, I signed a contract with a BET structure which should send me the associated structure study by the end of July 2010 [execution studies for repairs to sub-works, calculations of vertical load distributions, calculation of the compression slab, calculation of the stair hopper ...]

Finally, I made arrangements with the architect who will finalize the final plans and the final drafting of the DCE for September 2010 with a work schedule set from March - April 2011.

Here are some details that bother me and I would like to hear from you:
- without citing brands, what are the characteristics of the recommended natural interior paints?
- I plan to cover the floor with solid Gascony pine parquet flooring with an acoustic underlay directly on the compression slab. What do you think ?
- the ground floor heating network will be removed and the cast iron radiators will be kept. I plan to use a clarinet, multilayer pipes (2 layers of PERT enclosing an aluminum tube) and grooves in the lower floor of the ground floor. What do you think ?
- the ground floor electrical network, built with rods in the 70s, will be removed. I intend to pass the ducts in slits from the low floor to the ground floor and hesitates upstairs between slits in the compression slab and a passage through the caissons installed in the crawlers. What do you recommend ? The architect applied to the letter the NFC 15-100 standard specific to new homes for the installation of sockets and switches. For budgetary reasons, do you advise me to remove certain recommendations (TV and telecom sockets in the upstairs bedrooms) being under renovation?
- do I have to install a humidity sensitive ventilation of class A or class B?
- I finally intend to make a thermal correction of the "south" wall of the garage. Is the choice to use a metal frame, a hemp / wood wool insulation and a fermacell plate directly on the bare concrete block good?
- Does anyone have feedback to share on the installation of thin tiles [3 to 5 mm] laid in renovation on the old tiles? I intend to use a UNIK type tile from the LAPEYRE brand, the stated flexural strength of which is 700 N / mm²,
- Has anyone already installed a "reflective" HPV under-roof screen which in principle makes it possible to limit summer overheating? Is this recommended in my case knowing that I have - thanks to the litelage - an air space about 5 cm above my HPV screen?
- is a projection of the roof on the "south" and "north" facades of 40 cm sufficient? On the one hand, I intend to protect the wooden cladding of the "north" facade and protect myself from the summer heat for the "south" facade.

In short, at this advanced stage of the design, do you have any advice for me in terms of technique, cost or planning?
For reasons of cost and follow-up of the work, I intend to stay and live there except when the vacuum on the stay is created ... but I am not sure that this is possible.

Thank you in advance for your answers.

Note:
I listened to JP. OLIVA during the eco-citizen meetings of Mérindol (84) on the WE of June 5 and 6, 2010: it was fascinating.