Here's my first hand experience of learning how to measure and install Perfect Fit Blinds. They're incredibly easy, too!

A few years ago, my brother-in-law showed me and my fiance his new Perfect Fit Blinds and we instantly fell in love. We didn't need any at the time and had no idea what they were called or where to get them. And after four years of not knowing what to do with our not-so-pretty loft dormer conversion, our neighbours suggested that if we just paint the roof tiles using Sandtex masonry chestnut gloss, it would look fine.
I'll give you a hint, this dormer is one of the main reasons we were able to buy it at an affordable price. So we did a little test with a tile sample and loved it. It's not something we'd considered before, and then went on to photoshop to superimpose some white double glazing to match the house and everything looked instantly better.
If we could pull this off, it would save us from paying a builder 20k to 30k to have it altered or put on the back and here's what the result looked like below.
BEFORE AND AFTER WITH PAINT AND PERFECT FIT BLINDS

Notice that our new double glazing matched the rest of the windows. Originally we had a few companies give us quotes for the same window design in he dormer. It looked great on paper drawings, but I'm so relieved we also used photoshop to mock them up too.
They just didn't look right, so instead, we asked for them to match the rest of the house. So now we were happy with them, there was just one problem we had with our newly decorated room. It was an unbearably hot sun trap and as this is our new entertainment room. It was insufferable in there, but I didn't want to put just any old blind up and drill or screw in to our new framework if I could help it.
So after much consideration, we decided to seek out the blind we saw in our Brother in law's again. And now we discovered they were called Perfect Fit blinds.

SO WHAT ARE PERFECT FIT BLINDS AND HOW DO THEY WORK?
Perfect Fit blinds are an integrated blind that clips to your existing double glazed window frame. That is, providing your windows have an internal trim like the one above (ticked in red). If you just have a rubber seal trim like our bathroom window on the right, it won't work.
The internal frame section is important as the blinds come with clips that slide behind them, trapping themselves between the trim and the glass itself.
Once they're in place, the blind frame itself fits to the clips and that is it. No drilling, no screwing and can be easily removed without any damage, leaving no trace behind. And from start to finish, each blind took around 10 minutes to build and fit.
HOW TO MEASURE & INSTALL PERFECT FIT BLINDS

GLASS SIZE FOR PERFECT FIT BLINDS
To get the right size for your Perfect Fit blinds, you'll need to measure between the exposed glass that you see. This does not include the frame work.
- Take three measurements of the width (top, middle and bottom) and only jot down the smallest measurement.
- Take a measurement of the drop
- Treat each section of your window as a completely new window
- And ALWAYS double, or in my case, triple check your measurements to be safe.

MEASURE THE DEPTH OF YOUR INTERNAL TRIM FOR PERFECT FIT BLINDS
Trims vary from size to size, so you'll need to hold something straight, like a credit card, against the corner of your window across.
Now hold a tape measure against the glass and take note of where the credit card edge starts. In my case, it was 22mm. This meant I needed to order 22mm clips to slot behind the glass to be a secure, safe fit.
I also had to pick my colour (every was white in my occasion), and which side I wanted my blind contols to be. I picked right hand side for all as that meant they'd be easier to access.

WHAT IF YOU GET YOUR MEASUREMENTS WRONG?
For me, there's nothing more embarrassing than getting my measurements wrong. Sometimes it does happen, but do stress again to double or triple check. I would have been even more embarrassed as I was kindly gifted these from Direct Blinds for honest review purposes, so didn't want to have to email them and say I'd messed up from the get go.
However, if you have miss measured your blinds, they offer a free SizeSure guarantee where they can alter or replace them at no extra cost. But, as with any company, they do not offer full refunds on made to measure orders, so you need to choose your colour and design carefully first. I prefer using photo editing software, such as Microsoft Paint or Photoshop to prevent any unwanted surprises. Just as we did with our double glazing.

SAVE YOUR BLIND MEASUREMENTS
One of my biggest time saving things, although it may be obvious to most, is to save my measurements with window drawings and keep them safe. All of my blinds were clearly marked with their measurements and as I had ten very similar ones, I could see myself getting in a pickle. So I sat down and took time to number each one, cross matching them with my window drawings.
AVOID MY MISTAKE
One thing I couldn't find were the instructions. The boxes was really well packed, but I expected to find the installation guide loose inside. However, it wasn't until I went to fit my tenth blind when I found them attached to its packaging. Had I started on that one first, I would have found them.
Luckily, these blinds are so easy and self explanatory to fit, I didn't really need them and had no need to call the company.

HOW TO FIT PERFECT FIT BLINDS
First, lay your blind on a flat clean surface with the good side facing down.

Slot the pieces together as shown in the picture below.

Fit the corner cover pieces in to place from underneath and press in to place until you hear them click.


Now, using the only tool you'll need which is a small handheld screw driver, screw down the protruding screws that are already placed here for you.

Then using the screws that come with the corner piece, screw them in to place too.
And that's all you need to build the frame which took me about 5 minutes!

FITTING THE CLIPS IN TO THE WINDOW FRAME

The clips need to be positioned where they line up with the window frame's oblong slots. Many YouTube videos will show you how to place them using the long side of a credit card as a measurement. However, trying this method was quite awkward for me as trying to hold card while slotting them was quite stiff.
MY ALTERNATIVE METHOD

Hold the window frame against the window and using a pencil, mark where the oblong slots line up.
The pencil markings are easily wiped off and because the oblong is bigger than the clip, it means you don't have to be accurate to the mm. There's some allowance if you've got it ever so slightly out.

Lubricate the clips with washing up liquid or hand wash, which was closer to me.

Push in the clips until they go all the way in, making sure the pencil mark is in the centre of your clip.

Place your frame in to position, lining the clips up with the oblongs and press until the clips hook in to the oblong holes.

Finally, hook on the venetian opening and closing control which works with a twisting motion and you're all done. In total, the whole process took ten minutes per blind.
OTHER TYPES OF PERFECT FIT BLINDS
The reason I picked venetian blinds is because we can partially open them to bring day light with but still keep our privacy. The can also be angled up to allow more light in while those from outside can only see the ceiling. This was important to us as these windows are on the front of a main road.
If they were on the back on the house, we may have considered Perfect Fit blinds in pleat or roller blind (which also offer black out options). However, if opened, people would have been able to look straight in. So it just depends on your needs. I'm extremely happy with them, but if you have any questions I haven't answered, then please ask below and I'll do my best to answer.
Perfect Fit Blinds Installation Guide
Equipment
- screwdriver
Ingredients
- perfect fit blinds
- pencil
- washing up liquid
Instructions
- First, lay your blind on a flat clean surface with the good side facing down.
- Slot the pieces together as shown in the pictures above.
- Fit the corner cover pieces in to place from underneath and press in to place until you hear them click.
- Now, using a small handheld screw driver, screw down the protruding screws that are already placed here for you.
- Then using the screws that come with the corner piece, screw them in to place too.
- Hold the window frame against the window and using a pencil, mark where the oblong slots line up.
- Lubricate the clips with washing up liquid or hand wash, which was closer to me.
- Push in the clips until they go all the way in, making sure the pencil mark is in the centre of your clip.
- Place your frame in to position, lining the clips up with the oblongs and press until the clips hook in to the oblong holes.
- Finally, hook on the venetian opening and closing control which works with a twisting motion and you're all done.
Video
NEED TO SAVE THESE INSTRUCTIONS? WHY NOT PIN THIS FOR LATER?

MY VIDEO MEASURE AND FITTING GUIDE
ALWAYS CHECK WITH YOUR MANUFACTURER'S INSTRUCTIONS
If in doubt, always check with your manufacturer's instructions in case they differ from other blinds on the market. It is down to you to and your own research before submitted measurements and fitting. This guide is strictly to give you an idea and cannot take any responsibility.
You may also like:
- How to fit sloping vertical blinds using Direct Blinds
- Upcycling old roller blinds with new fabric
- Double roller blind review and installation
- Installing Conservatory blinds
- DIY conservatory roof blinds to reduce the heat
- How to measure for bay window blinds
- Fitting camper van blinds
- Installing UPVC double glazed windows
You can find the video for that here too.
Disclosure: These blinds were kindly gifted by Direct Blinds in return for an honest review and installation guide and video. I was already a regular customer as I've found their prices are extremely competitive and love the quality. I have never had any issues ordering from them.


Izzy
Hiya, thanks for the useful video!
How much of the window glass do you lose to the perfect fit frame? Our windows are quite small to start with and we don’t want to lose to big a proportion of them to the blinds!
Bob
Hi Vikkie
I stumbled on your YouTube channel by accident but have now watched most of your posts. I especially wthjs post as my wife and I have been wondering how to install blinds in our new conservatory. These blinds are perfect. Esay to order, quick to arrive and as your video shows easy to install. We are so happy we plan to convert all of our rooms to this style of blind. The aks again. Keep posting the videos and congrats on the new venture into TV. Bobajob40
Iain
Hi, great article. My issue is different in that the actual Venetian Lind won’t stay in place when you manually lift them up to clean the windows. They keep sliding back down again, whereas the other one in the pair can be slid up and down and stays.
Any help?
Cheers
Julie Dean
Hi. Have just received my blinds and am having difficulty in fitting them because of the seal that surrounds the window and cannot seem to fit the clips.
Jacqueline Tait
The cord around our blind has snapped so the blind doesn't stay up anymore. Do you know how to fix that? We also have blinds that slowly creep downwards, even after trying to angle them at the top. Can we fix that?
Thanks!
Marion McLaren
Hi
I'm trying to order this type of blind for a 165cm wide window but the maximum allowed seems to be 140...did you come across this issue?(Just thinking that yours looks to be a similar size to mine!)
Thanks in advance