I know what you are going through, I have 2 mastiffs and they are blowing coat talk about frustrated!
These are the months for coat blowing, but I find indoor dogs will shed some year around.
First and foremost, shedding is natural, we all do it, and there will a couple times in the year that your dog will blow his coat and shed more.. you can cut down the unseasonal shedding with diet and proper grooming..
#1 is DIET! Get a premium food rich with Omega fatty acids and protein , if you your dogs are over 60# I find that the Diamond Naturals Large Breed 60+ is wonderful! And it also helps keep joints healthy.. never get a food that has a grain/vegetable as the 1st 2 or 3 ingredients
( you don't see dogs out grazing in fields, they love meat! and they have the teeth for meat tearing).
Also tap water has many chemicals in it.. try getting a couple gallon buckets with lids, fill them up with up water, and let the water sit for about 3 days.. only give your dogs water from the buckets.
This allows the chemicals to dissipate or sink to the bottom. It's not just for skin and coat health, but overall health.. when the 1st bucket is gone, fill it up and wait 3 days while you are using the other bucket, don't use the water on the bottom.
Depending on how much your dogs drink, you may need more buckets. I have heard filtering water is fine as well.
Adding a raw egg white a day(egg yolk cancels out the benefit that is in the egg white) is good for them also.
#2 You can also buy a product called Shed Stop.. works wonderful! but is pricey..it's a blend of oils that are beneficial for skin and coat and I feel also the joints.
I don't personally use it, it was too pricey for me since my dogs are both over 130#..
I did some research and started using Pala-Tech F.A./Plus Chewable Tablets. You can get these online for cheap, I get them from the vets office I work at..so if you want them right away, call your vet and see if they can order you some. It has worked wonderfully and I will have my dogs on them for the rest of their life!
#3 Grooming! Brush your dog every day, the rake is wonderful and very effective. Only bath 1x a month, less often in the winter. Use a skin nourishing shampoo such as aloe or oatmeal.
#4 optional but has helped my home ALOT.. get a roomba! I got mine off of ebay for around $55 that included shipping.
I was vaccuming my laminate floors 2x a day. Now I run my roomba and only have to vaccum 1 or 2x a week to get in the grooves of my laminate. I personally do not reccomend roomba for thick carpets.. Low pile carpets would be fine, it will get any surface hair off. Make sure the brushes and bin stay clean.
The above steps have helped me great deal, my dogs are no only shedding 80% less, but they have very shiny coats and more energy..
Diamonds Naturals Dry Dog Food: