How can I insulate the double-brick walls of my 100-year-old home?

How can I insulate the double-brick walls of my 100-year-old home? One contractor says he can drill holes in the plaster and blow insulation into the space between the bricks. Another contractor says this isn’t possible. Who’s right?

Home heating may be far from everyone’s mind right now, but you’re wise to plan for it. And while it’s certainly possible to go through the motions of drilling and insulating, chances are slim that this operation will do any good. There are two reasons why. If there’s any substantial space between the bricks, it’s probably choked with hardened

wall_insulationbits of mortar that fell into the space as the bricks went up. And even if you could somehow get the insulation to flow properly between the bricks all the way from floor to roof, it’s almost certain to go soggy and moldy in short order. Bricks aren’t good at keeping rainwater out, especially old bricks. The contractor who’s been discouraging you is the more competent and/or honest one.

The best approach for insulating older masonry homes involves applying two inches of extruded polystyrene foam to the inside or outside face of exterior walls. This is a big job involving tricky finishing work around windows and doors, but it does work. Trouble is, it only makes sense if you’re planning to install new siding on the outside or drywall on the inside.

Learn More Every Saturday!

FREE weekly tips and advice to make your home work better, whether it’s a rural homestead or a place in the city.

Just want to say how much I enjoy your Saturday morning newsletters and website. The content is always excellent... - FL

Thanks so much for the terrific work you do, and the outstanding resource you provide. - KS

Your videos are outstanding! Very instructive, and animations and your speech really helps to get the messages! - DB

Baileylineroad is supported in part by advertising. If you can't see the ads below, please consider turning off your ad blocker when visiting our site, or subscribing to our newsletter. Thanks for visiting!
0 Shares
Tweet
Share
Share
Pin