Make you bids ladies and gentlemen – how long would take to complete my midbass horn.

We broke the wall last Fridays and this Friday we made firth plywood cut. When I said “we” I meant truly not my carpenter and me but just my carpenter as my part of work at this point is just to walk around the bother my carpenter with predictions how he will fuck up. My carpenter woks 5 day per week, from 10AM to 5PM. He borough the machines in my home and set up as shop in one of the basement rooms. In that room he will cut the wood, glue the sections, then the section will be brought to the listening room, connected, the horns  will be beefed up, finished, lifted and installed in the attic. Then the room’s wall will be refinished.

My carpenter thinks that he would need 2 weeks to finish the job. I think that he is dreaming. I think that from where we now we are a good 4-5 weeks to be through. Since we agreed to make the wok for a fixed price then the money is not the factor for my carpenter to make it longer. Still I feel that on September 1 the project will not be compete. I hope I am wrong of cause.

Interesting that to cut the wood is much more complicated then I thought.  The problem is not with the multiple sections and multiple small plated but with the fact that each plate has to have proper angle on it’s sides to be properly glued to the neighboring sections. That all make it kind of complicated and my carpenter unfortunately is more thinking then cutting the wood. Sure, it is not as unfortunately as I am trying to make it, in fact I am a fortunate that I have not a moron carpenter. Still, thinking does not advance the time line and there is a LOT of work ahead of us. So, I think that if in the end of August we will be closing the project then I will be very lucky. I certainly do not in this project any 2-3 weeks of work.

Paul S wrote:

Scooter, many houses in the Northeast were roofed by people who understand how this works, and the first few courses of shingles are "underlain" accordingly, to preclude such seepage. In Romy's case, I believe he could simply treat the entire horn like a "room", since the conditioned air from the house will moderate the horn's temperature, etc. via the horn mouth, in any case. The floor/ceiling area under the horn would need special attention before the horn was installed, with high-value insulation going into the relatively shallow joist bays, before the horns were slid in.  Then, the horns themselves would need to be fully insulated, probably with foam, and the remainder of the "gable" wall from which the horn mouths emerge should also be fully insulated.  This would complete an insulated shell around the conditioned "space", and the attic, per se, could then be fully ventilated, as it is now.

I would like to keep this site dedicated to audio subject but unfortunately I moved astray. Investigating my insulation dilemma I did not know that I would step in the middle of a huge debate that is going on in industry. My dilemma is that I would like to have my horn insulated and to ask as a “house room” but top sides of the horns are the bottom sides of roof and applying insulation above the horn means to apply insulation under the roof.

I have research the contemporary high-tech insulation products – the open sell foals, like Icynene and alike. I can mix it with led or large sand and get my mass and isolation. The question is if it right thing to do. What I will be doing is creating what the industry call “compact roof” by applying the foam under the room preventing air to move through or around the bottom of the roof, creating a complete air barrier.

This becoming very fashionable practice of foam insulating the attic is raising eyebrows in the building industry because typical techniques call for attics to be ventilated. By insulation attic from room the room get much cooler on summer and much wormer during winter but it also raises the temperature of the roof’s shingles very dramatically and prevents the shingles to be warmed during the winter. The debts are going on between builders and between the people who sell foaming services. The first one hate it, the last one love it. It is not a big deal to buy a set of DIY-targeted TigerFoam or alike and to apply it to my horn’s outside but  I am still not convinced.

Hm, I am wondering …

msaudio wrote:

I Believe You made a mistake not useing a good horn maker. He is not bending long pieces of wood, he is putting a lot of straight small pieces to get away from forming long sides. Why is he not cutting long 1/16 inch slots along the backside of the sides so the wood can bend freely? Doing it his way, you will not have a smooth contour of a horn. Sloppy work and romy you know better. The sad part he has the tools in his room to doit correct.