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jtbadgett 05-19-2020 03:30 PM

New Construction/Blank Slate
 
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Hello everyone.

I am in the current process of building a new house. I have set aside an area in the basement that is eventually going to be a dedicated media/movie room. The internal room Dimensions will be 29ftx21ftx10ft tall. I know there is a "golden ratio" for length/width to height ratio. As far as HVAC goes, there will be a mini-split AC unit that is basically going to self contained inside of the room providing cooling. Any help would be GREATLY appreciated! i am still learning and trying to read on everything i can. The photo that i attached is what basement layout is going to look like. Everything in blue is set aside for the media room. All the green is 12" block that is filled full of concrete.

Thanks,
-Thomas

BIGmouthinDC 05-19-2020 03:37 PM

next step is do draw a scaled floor plan showing door, seating, screen, projector, and speaker placement. That will help determine what modifications and considerations you may need to make with construction. First thing is where do you plan on entering and will you need an elevated riser for seating? where will that go? Take a stab at drawing it up by hand and posting to this thread you've created.

I doubt that they will be using 28-29 ft long floor trusses to build your floor/ceiling so some additional support which is not on that drawing may be required, It could throw a monkey wrench in your plans. you need to know this quickly in case you need to head off a disaster like a support column in the middle of your planned theater room.

jtbadgett 05-19-2020 03:45 PM

Jeff,

I have a clear span basement. I have 30ft 24" floor trusses that are going to be sitting on the basement walls. So, all the is good to go. I basically have free range for the basement.

BIGmouthinDC 05-19-2020 03:46 PM

Wow, Any duct work hanging down for upstairs rooms?

jtbadgett 05-19-2020 03:53 PM

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No duct work will hang below the floor trusses. I had custom floor trusses made that will have the HVAC ductwork inside of them. The ductwork chases run completely left to right. full span of the house. Here a near completion picture and one of the floor truss layouts.

BIGmouthinDC 05-19-2020 04:14 PM

OK, lets work on the floor plan, any notion of where you want the door and how many seats? What goes on the flip side of the stairs?

jtbadgett 05-19-2020 04:34 PM

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The flip side of the stairs is probably just going to be an empty room right now. I might eventually have some saltwater tanks down there. the HVAC is going to go under the steps. Same with the water heaters. House is being wired for 400amp service with dual 200amp panels.

Looking at doing double walls between the steps and exterior north wall. So, it would be Doorway, room, doorway, then into media room. That room i would like seating for at least 10. To the left of the steps i am going to have that framed out already.

Here is my lovely paint skills... haha!

BIGmouthinDC 05-19-2020 04:56 PM

Are you thinking about reclining theater seats? two rows of 5 seats each is very doable in a 21 ft wide room, two rows of 6 seats if you pick the right model seats may be doable. Thoughts about the back of the room?

Blackdevil77 05-19-2020 05:43 PM

That's an excellent blank canvas. Looking forward to this one. You have space to work with I could only dream of.

jtbadgett 05-19-2020 06:37 PM

Jeff,

If I don't need the space in the back of the room then I would frame it off and make another room. I gave myself the biggest available room I could. I just don't know what the dimensions I need for awesome acoustics. But I am definitely looking at (I think) a 11.2.4 setup.

BIGmouthinDC 05-19-2020 07:04 PM

I think you would be quite happy with a 9.4.4 setup. put your subs in the four corners for most even bass response. Think about creating a projection room in the back to reduce sound and heat in the theater. You need to be careful of projector selection to handle the distance. 13.2 channels of processing is a lot cheaper than the processors capable of 15 channels. If your project budget can support the Trinov based 16 channel systems do it.

https://www.accessories4less.com/mak...-w/heos/1.html

jtbadgett 05-19-2020 08:20 PM

Jeff,

What would the dimensions need to be on that room to get correct sound? Or would I need to rotate the media room 90 degrees and make it a 21x15ft? If I went that route then I could easily build a projector room with the remaining 21x14 space? Or would you leave the orientation the original way I had it?

Thanks for all your help/advice!

BIGmouthinDC 05-20-2020 04:54 AM

one industry "expert" says rooms with the length 1.2 to 1.4 of width work well for overall design. If you want seating for 10 you shouldn't make your room narrower. By his guidelines you should consider a room 25.2 to 29.4. 3 ft at the back for an projector closet and subwoofer niches might work well. You should invest the time to watch this video (and there are two more) There is industry debate on his rear and ceiling speaker placement recomendations




p3bham 05-20-2020 07:20 AM

This is a great space. You should be able to end up with an awesome theater. I would definitely go with Big's recommendation of a separate room for the projector and equipment - having those out of the room will help a ton with both comfort from a temperature perspective as well as from a noise/light perspective.

jtbadgett 05-20-2020 10:46 AM

I would like to get all of that inside of it's own room. The wife is trying to steal part of my theater space right now for a home gym. I got a lot of arguing to be able to keep my space to myself :-D

p3bham 05-20-2020 02:16 PM

Quote:

Originally Posted by jtbadgett (Post 59678964)
I would like to get all of that inside of it's own room. The wife is trying to steal part of my theater space right now for a home gym. I got a lot of arguing to be able to keep my space to myself :-D

Fight the good fight! We're with you lol

jtbadgett 05-22-2020 10:12 AM

haha... yeah! i am working on it! Slowly but surely she is starting to come around.

Matthew Mills 05-23-2020 04:38 PM

Where is the bathroom?

jtbadgett 05-26-2020 10:24 AM

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Well, there wasn't a bathroom slated for the basement originally. I just got through plumbing in a half bath on the other side of the basement this weekend.....

Concrete is being poured Thursday, weather permitting.

trancedigital 05-27-2020 11:43 PM

Don't even think of reducing the size of the room you have. This is a great size for comfortable seating for 10 people. Let the wife make her home gym on the other side where you want to put saltwater tanks. :D

Read this thread if you have not already. Rob's theater dimensions are almost the same as yours.

Is there a reason you went with concrete blocks for the foundation instead of poured concrete walls?

jtbadgett 05-28-2020 09:58 AM

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Concrete block walls were HALF the cost of doing poured concrete walls. I even looked at pre-cast walls from 2 different local companies and between the cost + crane rental. I was about $12k more than doing 12" block + rebar and poured solid with concrete.

I also got all the gravel leveled in the basement.... took 2 4-5hr nights. Now, i just need to put down the vapor barrier and pour!

JeffG02 05-28-2020 01:25 PM

I am constantly amazed (and emasculated) at the immense cross-over of people on AVS who have all three attributes: nerdy enough to LOVE home theaters, have the cash to do it, and most impressively...construction skills to actually do things themselves. I mean. Seriously? Weekend warriors doing plumbing, HVAC, electrical, trim work....??

I possess two out of the three...I can't build a birdhouse.

Sorry just a thought explosion after reading numerous build threads.

BIGmouthinDC 05-28-2020 02:03 PM

I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.

p3bham 05-28-2020 02:35 PM

Quote:

Originally Posted by BIGmouthinDC (Post 59722070)
I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.

Hahaha same

jtbadgett 05-28-2020 02:37 PM

Quote:

Originally Posted by BIGmouthinDC (Post 59722070)
I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.

Jeff... i am working on the new infinite black roofing mod :-D

You can also see the bucket of my Kubota tractor in the doorway with a half bucket of gravel that we took out. I added WAY! to much gravel to the basement originally. I am excited for the almost 35 yards of concrete to be put in and it finished!

jtbadgett 05-28-2020 11:20 PM

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So, As an update to the progress. I am starting to learn how to use google Sketchup and doing an "as built" dimensionally accurate drawing. The white box is my quick representation of the steps (will add them in later). The left side of the room is going to be the Theater room. I have added in a 2x4 wall with 1/2" sheetrock as a divider. So, this should give everyone a more "realistic" idea of what i am working with.

Any new suggestions or changes to those room dimensions will be greatly appreciated! I am going to start working on theater layout in the next day or so.

Thanks,
-Thomas

jtbadgett 06-14-2020 11:12 AM

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I know i haven't updated this thread as much as i would like. The construction process has hit a few snags. Trusses were delayed a week and just got set Friday. Hoping to have first floor framed by tuesday. Crane will be here Wednesday to set 2nd floor trusses, and next Monday it will come back to set the roof trusses. Anyways! Here is what everyone here cares about :) the media room! The 2nd picture will be the wall the projector screen will be going towards. I know it has an offset, but i will frame that flush, and then either frame a second wall in front of the first, or i will just go with larger material framing for that portion of the wall.

The framed wall which you see now is the wall that is going to be finished next to the steps. I am looking at building a disconnected 2x4 framed finished interior wall just inside of that one to help eat up the sound. I would like to know thoughts/opinions on that? Or would you just stick with the single wall and just do double 5/8 rock and good insulation?

Thanks,
-Thomas

BIGmouthinDC 06-14-2020 11:51 AM

Double wall framing best in show first place, single wall with clips and channel second place. Neither you get a participation award.

jtbadgett 06-14-2020 11:58 AM

:D:D

Well, we always strive for first place!

Would you frame over the concrete walls? Or would you just do sound absorption panels in appropriate locations? I am trying NOT to eat too much of the room up, but i guess do it right.. or not at all!

Thanks,
-Thomas

Quote:

Originally Posted by BIGmouthinDC (Post 59806330)
Double wall framing best in show first place, single wall with clips and channel second place. Neither you get a participation award.


davehasplans 06-15-2020 03:34 AM

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Hey mate - yeah that's a great space - nice one.

Had a quick play with those dimensions - I think it's what's been suggested here - I put a 720mm door at the back - not sure what the pros think of that space - too shallow?
It shows a possible 11.x.4 - or 9.x.4 if you remove the grey surrounds.

Looks like a 160' 2.39:1 screen would be good (depending on your preferences of course)

Just my two cents - playing around :)


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