@Sarah Much of the wood furniture in our house are pieces I ‘inherited’ (since they came from relatives who were still alive at the time, it was more of me being the sole person who expressed interest when the opportunity to get the furniture came up) some is over 40 years old, the newest is around 20 years old. Pretty much all will make it to the age where they will officially be considered antiques with my efforts to keep them cared for and clean. Upholstered furniture is slightly different in what to look for to get a long lived piece, and as many are featured in prominent areas (read: people see and use them a lot) it’s commonly these items we frequently want to replace/redo with something that suits the latest trends. The sofa with chaise that is in our main floor living room we bought in August 2017 (special order fabric so it wasn’t actually here until late September) wasn’t terribly expensive at around $700, but it fits the space and our 4 foster kiddos watch tv/play downstairs in the basement family room area that has the ‘wallhugger’ stationary back wood frame futon. The futon mattress is relatively inexpensive to replace, dark gray in color, so if it has to be replaced we’re totally fine with that! The sofa+chaise is a lovely sapphire blue, a nice place to seat guests and where the mister placed the GIANT fancy new tv (the only furnishing that he really wanted to pick out, was that tv - everything else he has put in my hands to decide on!) so he can watch it, and I can simultaneously cook while watching the news/whatever tv show I’m binge watching. Do I expect the sofa+chaise to eventually be a 100+ year old family heirloom? Of course not. But it will make it at least 8-10 years before I’m itching to replace it, and that’s okay. The mister isn’t creating a dented area in the shape of his butt on the thing even though he usually sits in exactly the same spot and the exact same position. So far there hasn’t been any stain-causing mishaps by anyone, all I can ask for really. :p

Molly, I am surprised you saw my post. I could not find it and I just reposted. I live alone now, but I do get a fair share of company, and my two grandchildren are under the age of eight. I love the way a bench cushion looks, but they don't offer it in this sofa. I had one years ago I had to smooth it out all the time. Funny even when I am a lone I end up sitting in the middle, crazy I know!!! I was concerned if it would be noticeable the 2 different depths. Thank you for your input, much appreciated!

Contact a local upholstery shop and see if the spring bed can be secured to make it firmer. Also, some cushions, depending on the content need to be fluffed all the time. I don't know when you purchased this but can the store send out a tech again to adjust or replace the filling? There are inserts for cushions. https://sagsaway.com/sagging-cushion-support/?keyword=how%20to%20make%20your%20sofa%20firmer&gclid=CjwKCAjwkJj6BRA-EiwA0ZVPVqotwTe1ugvEehlimXmH_QDG89Yc2_i9vK59kGCELvMJXu4GHJuCQxoCmqEQAvD_BwE

There are some good foam spray adhesives out there. I used some to glue 2 cut scraps into one chair seat. But sometimes couch cushions are rounded on the edges, which wouldn't work good for an overall smooth look imo. Do the covers come off for you to inspect the foam inside? That would be the first step to check out. If they are equal sizes with smooth cuts and 90 corners, then I'd probably try gluing them together first and see how it looks and works. Worst case, it sucks and you buy new foam, which you may do anyway. I have a local foam store where I purchase my supplies, so maybe google that in your area. They have all kinds of foam options (thickness, firmness, etc) with higher quality at competitive prices to hobby stores. As far as reusing the fabric, I don't think that would look good to have a seam down the middle, plus you wouldn't have any allowances left. So buy new of that. I have found many great tutorials and products on this website, including this adhesive. adhesive: https://www.sailrite.com/NG633-Foam-Lock-Spray-Adhesive-12oz