Check your local building department as you'll most certainly need a building permit for this modification. Even if it's temporary. Personally I like louvre windows. You'll get good ventilation and the newer products are a world away from the old style ones.

although i always prefer curtains a 6m wide opening will need either a very light fabric or about 1 m either side to fully pull back to each side where blinds would be able to be raised completely above the window (assuming there's somewhere to attach them) discuss options with a window covering specialist as there are some new options that may suit you better..i also suggest to clarify flyscreening, security and ventilation options for your very wide opening as we found a more flexible and cost effective result with a door height panel of stacked awning windows next to a wide section of stacking doors so that we can open the window for ventilation without opening the doors

If the window is in a shower recess you need to take special precautions for waterproofing to protect the timber reveal. If the window is not at risk of water damage then a standard timber reveal and architrave should work. I would suggest an aluminium awning window with a powdercoated finish would be good as it doesn't have a track if it is not in a shower recess. If it is in a shower recess consider a louvred window, without an architrave. When your shower recess has its waterproof membrane applied continue the waterproof membrane over the reveal up to the aluminium frame then tile over. Don't put a timber (or MDF) architrave around a window that is exposed to water as it will just rot out, along with the timber reveal. Best of luck Dr Retro of Dr Retro House Calls

Hi, Luxaflex do these Silhouette Blinds, they come in different colours so you can find one that will match your decor, provide privacy during the day when the blades are open and are available in Blockout and Light Filtering. Colour would depend on the furniture and other decor pieces but if in doubt try going for something light and neutral. These blinds are beautiful and much nicer then the double roller blinds. Best of luck finding something that you love and works for you. MKG