Looking for expert advice for adding insulation under a gas firep

MileHigh80228December 9, 2012


Newbie to the forum here. I'm looking for some advice regarding insulation below a gas fireplace.

We recently remove a large brick hearth. As you can see there is no insulation under the fireplace . The cold air comes in unabated and we would like fix that.

The three areas under the fireplace that need attention are all made entirely of wood (2x on 3 sides and 3/4" plywood on the top).

My understanding is of course wood has a much lower combustible temperature than either fiberglass or rock wool insulation. Is there any reason that I can't simply insulate the three cavities with product (non-paper faced) from the local home improvement store?

The town home was built in 1985. I'm unable to find any brand info/model number/specs pertaining to the fireplace.

Thank you for your thoughts and advice.

Thank you for reporting this comment. Undo

Spray foam where the rim joist meets the floor as well as anywhere you feel a draught from the exterior wall. Hold a lit long candle lighter and you will find where the air is coming in. Then fill the void with Roxul rock wool insulation. Your good to go.

I wouldn't be concerned with ignition of the lumber below, the unit looks to have a nice refractory lining, most units today so not.

    Bookmark   December 13, 2012 at 12:18AM
Sign Up to comment
More Discussions
Napoleon Fireplaces - Be Careful
I purchased an expensive Napoleon fireplace last summer,...
I need opinions on what to do with old fireplace
I have an old fireplace that needs a rehab badly. What...
Metal Fireplace Mantel; Distance & Depth
Hi, This is my first posting. I apologize in advance...
Help me decide on a fireplace unit for new build
We are doing a gas Heatilator unit. Is there much difference...
See-through fireplace
Does anyone have any experience with the Lennox Montebello...
Sponsored Products
Illumine Pendants & Hanging Fixtures 1 Light Ceiling Green Fluorescent Pendant
Home Depot
Kraus KBU22-KPF1622-KSD30CH Double Basin Undermount Kitchen Sink with Faucet Mul
$519.95 | Hayneedle
Illumine Lamps Designer 26 in. Dark Bronze CFL Table Lamp CLI-LS-21437
Home Depot
Tekno Mini Alfa Clear Crystal Pendant by James R. Moder
$310.00 | Lumens
Tom Dixon | Peg Lounge Chair, Set of 2
Camino Vanilla Matte Satin Nickel Six-Light Mini Pendant
$796.50 | Bellacor
Stiffel A889-C550 27H in. Table Lamp - TL-A889-C550-SB
$261.80 | Hayneedle
Grant GD50 Peacock Blue Rectangular: 2 Ft. x 3 Ft. Rug
$66.24 | Bellacor
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™