How do I fill a small gap between brick wall of fireplace &wall?

Without a pic I can't tell you if it's a "scary problem" but after 30 years, I wouldn't think so. Get a can of "great stuff gap filler foam" and spray it in but don't spray a ton - it expands a LOT! Once it's dry, you can use a blade or kitchen knife to cut away any that has expanded beyond the gap.

You can get it at Walmart, Homey Depot, etc.

Now, I haven't used the gap filler so don't know how much this expands. The original expands a lot but you'll be able to tell once you start. Once you've trimmed, etc. you can paint right over it!

http://greatstuff.dow.com/product/big-gap-filler.htm?gclid=CjwKCAjwy_XaBRAWEiwApfjKHiwT51NY-Ah02VGchJ4thQ-rliQVZFWR368qhgviKoR7pEAY2tEdGBoCXsIQAvD_BwE

I would probably (well o.k. I would get my husband to do it!) just fill this in with a piece of quarter round or cove molding.

I would use caulk. You can then run your finger over it to make it smooth and fill in totally.

If you use a flat strip of wood...you can buy strips that are about 1/8 inch x 1 1/4 inch x 8ft. This length is long enough in some homes to do one side of fireplace with just one piece. It is wide enough that a thin line of construction glue will hold it to the wall. Might even find something a little trimmer in fake wood strip that you might not even need to paint. Easy peasy!

I had that exact same problem! We used an open cell spray foam to fill the gaps. Closed cell expands to much and can cause damage. Once you’re all foamed in, you can cover the gap with Liquid nails and Quarter round.

I hope that helps

😊

I would put wood strip in there and glue it in there.

Hi Linda, you can pick up a piece of molding or baseboard, cut it to length and cover that gap.

Caulking would be an easy and inexpensive fix. Is cualking available in differnet colors?