Don't install SuperFoil SF40 before watching this!! All our tips & tricks!

[@bellchambers2907]

Would recommend using a staple gun for pinning ths quilt. We've recently done this and it's worked really well

[@SuperJames1900]

Good afternoon, I have just discovered this product and love it ! I have discovered a wonderful way to cut it……. I have bad arthritis in my hands so big scissors don’t work for me ! Put a 1mm thick metal cutting disc in your 110 mm grinder , place foil over waste material then simply cut through it easier than hot knife through butter ….. try it ! Kind regards Nick

[@BrendanShoreland]

I had no idea how to fit this material. You've helped me to decide whether it's something I can tackle myself or not. Thank you for taking such care with lighting and audio, making your process crystal clear. Even the music was OK :)

[@mickydroyboy1542]

Thanks for this ,as a carpenter of 40 years experience I found your tips invaluable.the shears and the screws were really excellent advice .fantastic channel 👏👏👏

[@mrboyban]

Great video, exactly what I was looking for my pitched ceiling. Many thanks!

[@NZAbbasi]

I had the same issue with the screws through the quilt Thank for highlighting

[@richardgore2000]

Used this to add extra insulation to a hot tub, definitely help and saves the same cost in electricity per year😊

[@davidbyrd8473]

Any concern about piercing the vapour barrier with your nail tacks?

[@fcmcfcmc2868]

We’re putting superquilt in our loft conversion. Looking forward to getting to that stage.

[@chrisbudinick]

Thank you for your knowledge! You covered many important aspects that are easily overlooked in other videos!

[@richardsmith9998]

Really helpful video, I can't wait to insulate my loft and follow your recommendations. Thanks.

[@observer8838]

Useful tutorial - thank you. It would have been helpful to have see the images of the finished product.

[@jonnyharris55]

Considering using this in my next place. Thanks for the hands on info

[@tinytonymaloney7832]

I didn't think you needed the lagging between the rafters, I was led to believe the multi-foil went straight across the underside and stapled on. If the manufacturer printed grid lines on the foil face it would greatly assist in cutting a straight line.

[@allthegearuk]

Depends on the u value your are trying to achieve. Multi foil can be combined with PIR or other types of insulation to increase get a better u value.

[@crishill6458]

We usually use annular nails for fixing through the battens

[@benrichards1]

Staples mate. Bang some staples in it to hold it up. So much easier. 14mm.

[@thesquirrelhorde]

That’ll work for the thinner quilts but the SF40 is too thick for 14mm staples.

[@benrichards1]

@@thesquirrelhorde my main point was about the staples. 30mm then in this case.

[@robedmunds7163]

Tip with the screws will save me thanks

[@FoxfireGallery]

Wish you made a list of products and materials used to fit this foil. Also what distance between batons do you use on this project?

[@michaeljones3694]

Is the Rockwool between the rafters a lot less efficient than PIR? My son and girlfriend are getting a loft conversion and have been quoted for 100mm PIR. Their rafters are really deep (at least 20cm) so I was thinking they could put thicker insulation in than 100mm. The rockwool is breathable, fireproof and should be easier to install too

[@markaudley-thewles5920]

Really helpful thank you .

[@ozone1959]

Perhaps you could put a plastic wedge (spacer) between the batton and foil to get the flatness, also do knock the nail full in before finding how flat ceiling is

[@BS25999]

Really interesting - thanks.

[@iaboasis001]

Hi really interesting video, thank you for sharing. I am applying the SF40 to my own extension, I am really struggling with screwing the SF40, can you send me the details of the screws you are using.

[@spilleradam]

Don’t screw , screws don’t work .

[@michaeltap2051]

Before you fit the rock wool insulation. Do you need to add baffles first for air flow then rock wool then super quilt. ? Cheers

[@SC-hk6ui]

Superquilt should have a high enough R value without the rockwool between rafters. This would also allow an air gap for breathability.

[@RowlandTudor]

thanks - very useful

[@alaindegroot3553]

What's the brand of those carpet shears ? I didn't hear properly

[@GlenPearson]

Great vid, thanks for that 👍🏻

[@rossmale8715]

I'm a builder and I swear by this stuff, I normally use triso super 10 but there's all sorts of different brands. I've got fitting this down to a fine art and its way quicker and tidier than pir. Cutting wise I've got a special cutter made by actis, much like a box cutter its far easier than scissors

[@larrythelepp]

Would this work on the underside of 1930s pitched roof. Followed by battens and standard 12.5mm plasterboard or would o still need insulated plasterboard?

[@happispaces]

Don’t suppose you’re available for a project in Leicestershire? We want to extend to near passive house standard and looking for a builder who’s willing to try new methods. Not an easy task.

[@rossmale8715]

@@happispaces hi Angela, we're based in the West Midlands but might be able to help you out. Look up "male building services" and drop me an email via the website. I can't reply here with an email address or website as it will remove my comment 👍

[@tejasparikh]

Would there be someone around Harrow area who can help install this?

[@PhillHills]

just a note on the "nail gun" comment, Dewalt now do a roofing coil nailer. DCN45RND2 18v XR Brushless Roofing Coil Nailer.

[@johnbodnar3720]

Would it be better to leave a 40 mm air gap than flattening the insulation with the nail?

[@johnog8358]

Are you afraid of mould with the rock wool and this? Mould is my biggest fear with doubling up materials in a narrow roof or wall space.

[@allthegearuk]

May be too late but when I used a similar products the manufacturer did a condensation calculation for building control.

[@davidmaledy]

What about ventilation gaps. Are they not a thing now.

[@stevedunne9131]

The 50 mm air gap is on the underside then the foil then another gap over, so there are two gaps in effect.

[@aylorpaul39]

Do you not need 50mm gap between roof and 1st level of insulation i.e. rockwool ? And what's done ference between this an superquilt?

[@jonwoodscience]

@@aylorpaul39 That's my understanding too. A cold roof should have a 50mm ventilation gap between the sarking felt and any insulation. My home's rafter depth is only 75mm, so I can't add additional material between the roof and the foil underneath the rafter.

[@stepbackandthink]

12:55 Seems to be a problem with this method.

[@valis6761]

I always pilot hole before I put screws in wood, plywood, mdf etc…. no matter size of screws

[@TP1988]

Mate this is so useful! Thinking of using this stuff (the breathable version) on a retrofit in my attic - does anyone know the thickness of the product when compressed? I.e. the bit that’s squeezed between the baton and the rafter? Thanks to anyone who knows!

[@michaelhorn5633]

super quilt says 7mm when compressed

[@TP1988]

@@michaelhorn5633 thanks Michael, appreciated - couldn’t see it anywhere

[@davidchi1277]

Actis Triso foil is also a great product plus they have a super cutting tool, far better than scissors.

[@johnbodnar3720]

How many layers are there?

[@1x3dil]

Wouldn’t it have been easier to put a floating flat frame in first and have your foil just lade above it . Trying to get the ceiling level now will be a nightmare .

[@spilleradam]

I’m using that stuff right now, I staple it up and it’s a pain in the but,

[@johnbodnar3720]

What is the R value of the sf40?

[@MikeCarter]

Thermal Resistance R Value: Core: 2.62 R Value Roof: 3.58 R Value Wall: 4.04 R Value Floor: 5.69 Rvalue (Core value + 2 Air Spaces)

[@zedman442]

Some screws will also get caught in screws due to the woven material in the foil.

[@matthewjarrett6647]

I never heard such a long winded explanation of installing such a simple product. You make it sound difficult.

[@andymacleod2365]

You will find using a serrated bread knife easier to cut SF40

[@spilleradam]

You can’t screw the buttons, you have to nail them with a nail gun.

[@johnf3326]

Why is this so good? Radiated heat loss is minimal. So you must rely on something that traps air rather than reflects radiated heat

[@SC-hk6ui]

Plasterboard will trap air. It's how you reduce the radiation that counts.

[@crackjoker-yb8jp]

Superfoil s Chinese made. Buy Superquilt by a UK company.

[@t7980]

It’s a great product in theory but in real world it’s crap. Very very labour intensive, ballooning problems on overlaps like with every other multifoils, therefore requires bigger size timber than manufacturer recommends otherwise impossible to create air gap and achieve required U value.