Bluntly put, you need a porch rather than a deck outside that room.

"Ideas for window treatments that will minimize heat in summer and heat loss in the winter without breaking the bank."

Good quality window film.

In addition to curtains, think about plants. The shade from greenery is always cooler than from a solid roof, because of transpiration from the leaves.

We planted trees to the south and west of our hot deck. Because the setting sun comes in from the side, they immediately blocked it even at first. We kept their mature size in mind when we chose and planted our trees. They never encroached on the deck. In addition, we added a basic framework on the deck, and planted vines up and over it.

We also put an inexpensive metal-framed gazebo on the deck, for shade from above. It has a fabric top that we remove in winter, and you could add a side fabric "wall" until your greenery is fully grown. Depending on where you place it, it will block quite a bit of the sun coming into your house, and make the deck more pleasant to use.

I have not priced the awnings yet... it is such a long space. Suezbell ...I would love to cover the deck because you are correct...it is useless as is!! I even drew up a sketch with a gable coming off the existing roof but the cost was more than we could afford. Millworkman.......The problem with window film is that the seal on the windows is compromised and they need to be replaced but we can not afford to do that right now either. Don't know how much the film would cost but it would just be thrown away whenever we can replace the windows. :( Thanks for the input, you guys.

Solar shades and an awning. Do the awning just a little wider than the 4 slider windows. Shades on all windows. Lowe's pricing for solar shades is reasonable.

Partim... where did you get your gazebo? Again though..... the area is about 24 feet long. That's long space to cover. I'd have to check with the HOA and see if that would even be approved. Unfortunately we are not a young couple any more and we don't really have years for plants or trees to grow.

Wouldn't go with window film.

Can you create an arbor over the deck and add tinted "greenhouse" panels atop it?

Poplar trees grow fairly rapidly so if you might be able to have some planted a dozen or more feet from the deck this winter (what's left of it) and they could begin to your shade. DO know where your underground utilities and/or septic tank (if applicable) are before doing any digging.

Depending upon your geographic location and how high off the ground your deck is, some shrubs might be planted closer and give you some shade sooner.

Would talk with a local landscaper about these possibilities.

You might be able to create some small islands of portable shade with large patio umbrellas affixed to mobile 4"x4" treated posts and/or add solar lighting.

https://www.pinterest.com/pin/38773246768011389/?lp=true .

You'd likely need to be able to collapse the umbrellas on a windy day.

Umbrellas such as these are worth considering but should be (in my opinion) somehow weighted.

https://www.walmart.com/ip/Products-Easy-Choice-Lawn-Ribs-Poolside-Hanging-Beige-Umbrella-w-Best-Garden-Polyester-Backyard-Market-Offset-Adjustment-Shade-8-10ft-Tilt-Patio/166312054?wmlspartner=wlpa&selectedSellerId=1381&adid=22222222227042942469&wl0=&wl1=g&wl2=c&wl3=107034667997&wl4=pla-297389650637&wl5=9011039&wl6=&wl7=&wl8=&wl9=pla&wl10=112561937&wl11=online&wl12=166312054&veh=sem&gclid=EAIaIQobChMIjsuGg6i25wIVzJ6zCh11bwKREAQYByABEgJQ-PD_BwE

If you can find deck post brackets (think flag posts but holding the post straight up) for your patio umbrellas (and perhaps extenders for their posts), could that be a solution that isn't built in requiring HOA approval?

https://gardenerspath.com/gear/outdoor-furniture/best-patio-umbrellas/

https://www.google.com/search?q=crane+shaped+patio+umbrella+stands&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj9u8WAqLbnAhWCdd8KHX9QAhoQ_AUoAnoECA0QBA&biw=1366&bih=628#imgrc=Hx_I11t8TKnBHM

Found these brackets:

https://www.hayneedle.com/product/deckdock-umbrella-pole-bracket-with-hardware.cfm?source=pla&kwid=PatioUmbrellaAccessories%20level01&tid=DECK008-5&adtype=pla&kw=&&g_acctid=933-667-2123&g_campaign=PLA%20%7C%20Outdoor%20%7C%20Outdoor%20Furniture&g_campaignid=2052058533&g_adgroupid=73444089575&g_adid=359638993615&g_keyword=&g_keywordid=pla-811944313625&g_adtype=pla&g_merchantid=5643243&g_productchannel=online&g_productid=DECK008-5&g_partition=811944313625&g_network=g&g_ifproduct=product&g_ifcreative=&tid=neng2052058533-73444089575-pla-811944313625-359638993615&gclid=EAIaIQobChMI_Nb6oqm25wIVF6SzCh3IQAOqEAQYASABEgJ-jfD_BwE&gclsrc=aw.ds

good suggestions... thanks. I'll look into the poplar trees. A couple of market umbrellas on the deck posts might be a good temporary help.

You could get pipes from a plumbing store to use as extenders.

I used an old pipe that was part of a tall analog tv antenna to "extend" the post for my rotating clothesline. That clothesline resembles an umbrella frame. I set the tall post in a concrete block in the ground at the base of the back deck and dropped my clothesline into it so I could reach the clothesline from the back deck that is at least ten feet above the ground level.

(Clothesline resembles this but more upsidedown like an umbrella frame: https://www.google.com/search?q=portable++clothes+line+resembles+umbrella+frame&source=univ&tbm=shop&tbo=u&sa=X&ved=2ahUKEwjhypOqqrbnAhXjmOAKHUk7D3IQsxh6BAgOECs&biw=1366&bih=628#sgro=om&spd=14237275930946424518&spf=1580765635706).

I can still collapse and remove the clothesline and the post is hidden behind a deck post. Would you have a place to store your umbrella(s) if you used brackets, with or without extender post, to hold them when you needed them most? If you had a bracket on multiple posts, you put the umbrellas only in the posts where you want/need need them at the time.

Congrats on the new house, by the way. Until you find a solution, you can always enjoy the sun room and deck in the mornings.

Window film. We had a West-facing loving room and once we got the film on, we only had to close the curtains for an hour in July, instead of all afternoon, all summer.

I know they are way out, but seriously vertical blinds are the best way to reduce the heat coming in from sunlight, while still allowing view and light.

Shade sails (aka Sun sails) also might be an option. Layer a couple for better coverage.

pics grabbed off the web

Get a retractable awning. You can control how far out it extends for different times of the year.

Solar shades on the windows will help tremendously.

If the seals are broke on the windows perhaps look into replacing the glass packs with one that has a low solar heat gain. Most window manufacturers warranty seal failures for 20years, materials only of course.

What is the purpose of the cornice board on top of your slider? Could it hold or hide a drapery rod? If so, room darkening drapes could be used.i. Also, what have your neighbors done?

I am going to look into the cost of film, awning, and solar shades. Just looking for the most cost effective solution. Thanks for all the suggestions. Ratherbesewing... I have no idea what the cornice board if for. It was there when we bought. I guess it's just decorative.

Toddinmn....... what do you mean by "glass packs" ,,,Can that type of glass replaced without replacing the whole window or door?

Film can void any warranty on the doors and may cause the glass to crack

Solar Shades can help, but solar shades over sliding doors makes NO sense to me. If you select white solar shades they will block your view

Gray/Bronze solar shades will allow you to see but over white doors with mullions it will look really odd in the room. And you don't need the shades all the time.

Retractable awnings are only there when you require them and they don't impede your view.

A Luminette drape/shade is a nice look and still allows you to control the amount of light that enters but is $$$$

Be sure that any overhead solution blocks the low setting sun

In most cases the glass can be replaced without replacing the window unit. You do have a lot of glass, and much it would need to be tempered Which cost more. It would still be expensive even if labor only.