COMMUNITY FORUM

kal152

07:27PM | 07/25/07
Member Since: 07/09/07
2 lifetime posts
Bvelectrical
I am looking for a recommendation for what size ceiling joists to put in for recessed lighting. I am restoring a historic home and need to put deeper joist on 2 of the sloped ceilings for insulation and recessed lighting. I was wondering if I should use 2x8 or 2x10 to be safe so there is enough depth for the IC housing.

Billhart

08:12PM | 07/25/07
Member Since: 04/25/05
1916 lifetime posts
What kind of insulation is there going to be in the ceiling? What kind of ventalition? What kind of vapor barrier.

IN general putting a recessed light in ceiling with minimal insulation and ventaltion is receipe for condensation and other water problems.

And can lights comes in all kinds of sizes and shapes. Some as shallow at 5.5".

MistressEll

05:12AM | 07/26/07
Member Since: 01/30/05
361 lifetime posts
kal152 already stated IC rated.

Next depends on if the fitures themselves are AT (air tight) or if they require a manufacturer's kit to be AT, and where you are placing these (for example in the ceiling of the highest living space between ceiling and attic or eave space. Next, the temperature, ambient; of the air space containing the fixture and wiring.

Each specific fixture will contain information (usually a combination of labeling and insert flyer or printed on the box) of specific clearances required for spacing. You don't want moisture issues up in a sealed and insulated ceiling cavity either so consider IC rated, AND Air Tight marked and/or the manufacturers AT kit for that specific fixture.

Now, the IC rated fixtures are going to have a temperature sensitive shut-off - but you don't want to be triggering this regularly having annoying flickering lights and having them cut-off - so its usually best to provide some heat-sink room, etc.

You also don't mention the type and depth of insulation you wish to use. Also, if these lights are on a sloped ceiling (like a cathedral ceiling, over a stair case, etc.) they tend to require more height clearance for part of the fixture housing/bracket assembly due to their angle of installation.

This is one of those cases where it is best to do some early shopping and pick out the fixtures (old work versus new work) you wish to use and check the minimum design specifications, then ADD more clearance as needed to accomodate your own unique considerations so they don't build up too much heat and have a way for heat to dissapate. Most manufacturers will let you download or send you the specifications for the specific fixture in advance, or ask them at the store to let you open a box and review the sheet and/or copy it for you, then seal the box back up with the original).

If you can afford the ceiling height reduction, I'd plan on going ahead and beefing up with at least 2x10s since the modern 2x8"s aren't nearly as strong as the old growth dimmensional lumber - and these days x10"s are minimum code - so most such fixtures will minimally work in a cavity 9-1/2" deep.

I'd avoid the minis that use high heat producing halogens, and the like, as they tend to heat up very hot and blistering issues with paint surfaces and such can be a hassle - also finding a zone for a transformer, etc.
Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Looking to run multiple wires along the same length? Simply place each of them into your drill chuck and spin it for a nea... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp1