Building an attic tent question.

[Mad Scientist]

I was planning on buying and installing a attic tent to save on heating and cooling costs, UNTIL I found out the attic tent I would need, costs over $200.
:nah:


My wife asked if I could build one out of lumber and insulation instead? So far, I raised the sides with scrap plywood and 2x6s, I had at the house leftover from other projects. The problem is the lid. I was planning on using a sheet of 3/8" plywood with fiberglass insulation attached, but wondered if the plywood would warp with the heat and cold? Is there something else I should use instead?

 

[FlyingRon]

I didn't even use lumber. I just glued a bunco of 2" rigid insulation together to beef up the scuttle which was just a sheet of drywall originally.

 

[Tarhead]

Welcome to NCWW! Please go over to the Who We Are section and introduce yourself so you can be included in the discounts
I built a similar insulating box out of 2x4s and 1/2" plywood with paper backed fiberglass insulation to close off a whole house attic fan from our first house when it wasn't being used. The lid was a hinged section of foamboard insulation which swings open when in use and closes automatically when the fan is off. You may do just fine with a few layers of foil backed insulation panel attached to the attic side of the access panel/door. Put in continuous weather stripping around your frame where the panel hits and call it done.

 

[afn59999]

You might start here:

From finehomebuilding.com

http://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/how-insulate-and-air-seal-attic-hatch?lookup=auto&V27=&V28=&V29=&V30=&V31=&V32=&V33=&V34=&V35=&V55=&V56=&Taun_Per_Flag=True&utm_source=email&utm_medium=eletter&utm_term=insulation-and-weatherizing&utm_content=20120507-inspector-game-deck&utm_campaign=fine-homebuilding-eletter

Good luck.