My DH is like this, too, but so am I.
We have 30 boxes of comics in the basement.
If it were up to him, every single daily sheet from day care would be saved.
If it were up to him, every single gas receipt, with the mileage and the gallons recorded on it would be saved.
I've found that throwing things out behind his back only addresses the symptoms, not the problem. The space just gets cluttered and filled up again. And it pisses him off and violates his trust.
After 6 months of mental work (since January, new year) I feel like I'm ready to begin the work to declutter myself. Someday I hope that DH will come along, but I need "get my own house/head in order" first.
Somethings I want to try:
1) Pick one space and get it organzed. Make it a place of beauty and harmony. If I could get one room or even one wall of a room in order, maybe it would spark a household clean-up.
2) Hold in mind that we live an abundant life. Trust that when we need things, they will be there.
3) Try to limit things to a single box or some amount. EG - with the day care sheets, could we save 1 per month or even 1 per week instead of daily sheets.
4) Engage a friend in a support system/group.
I recognize that I have some kind of problem - also from Depression era parents and so does DH. I think I come from a place of need or emptiness and so does DH. It's not simple laziness or even being overwhelmed. It's an actual problem.
You asked what to do: I would approach it very gently and work WITH your DH. Is he able to see that the desire to keep stuff is holding him back? There's a lot of good infor on this board about the "energy" of stuff keeping.http://www.mothering.com/discussions...d.php?t=290813
I'd also work to get a few rooms in order and honestly leave the junk rooms to him. You can't DO his mental work/healing work for him. You can throw shit out and box it up, but until HE comes to a place of feeling whole and abundant, the problem will start all over again.
And I think throwing it out behind his back or trying to force him to get to that place before he is ready will only make it take longer. Think of it like forcing potty training or sleeping through the night.
Good luck to you. I feel for you.