One-Way Perf VLT question 4 skylight extreme darkening

Sisqouc · January 11, 2019

I have some pyramidal shaped shaped sky lights to do. The reason I mention the shape is they really get some exposure and by design capture light to send downward to the bellow office space. Customer rejected the 20% Hanita XtraZone as not dark enough.

My goal is to block light to the 5 or 10% range with a 5 year warranty material.

Is 80/20 one way perf a 20% VLT? And does any major manufacture make a 5 year perf?

Otherwise maybe a Whiteout film for an opaque option?

Roach · January 11, 2019

Do they not want to go with a 5-10% silver film?

Not sure how they measure vlt with perf film...

Sisqouc · January 11, 2019

It is, I forgot to mention, only possible to do an External application so I've not been able to source a darker than 20% external film. I normally use SunTek and Hanita.

Tint Eastwood · January 11, 2019

Titan 07 xtra from Hanita. :thumb

Sisqouc · January 12, 2019

Thanks, I didn't remember that one, but with tax and shipping its pushing nearly three a square. And if the price ain't enough, I need 126 lineal feet of 30.5" width and the only roll size I see Hanita stocking is a 60" which runs $1,400 a piece w/tax.

I can see why the film cost as much as it does though with the following info considered: "XTRM is a new generation of extended-life exterior window films. Its exceptional durability ensures energy-efficient performance year after year. In fact, Hanita warrants XTRM exterior films for up to 15 years*!

Developed to tackle commercial projects where a long-term service period is critical to payback, XTRM delivers outstanding levels of heat rejection and UV block, and is compatible with nearly all types of glazing."

I'm considering Vinyl but with the odd triangle shapes these skylights have (triangles and dog house shapes) I'm a little worried about thermal breaks and hesitate to use Black Vinyl. Anyone know how much light the below product allows through?

3M 7725 90 ANTIQUE WHITE HIGH PERFORMANCE SCOTCHCAL

https://www.nglantz.com/2220079/Product/3M_7725

Edited January 12, 2019 by Sisqouc
Add manufacture's info

Tint Eastwood · January 12, 2019

Almost positive that the Titan comes in 72”. Don’t have the price list with me at the house but I’ve done quite a few jobs with it and I can’t imagine I was limited to 60” this whole time.

Not sure how handy you are but I’ve found that making shade panels for these types of skylights work very well and should outlast any applied film. Just a painted wooden frame with a stretched solar screen material. :twocents

Sisqouc · January 12, 2019

Nice pics, I'll bet it required some organization skills to avoid making too many trips to the ground!

Tint Eastwood · January 12, 2019

Actually they go in smooth. I pre build the panels at the shop and literally just set them on the ledge, add a few screws to hold them together and on the ledge.

Worst part is the ladder setup or if you have to add ledging for the panels. Still haven’t spent more than an hour or so installing one.

Edited January 12, 2019 by Tint Eastwood

Tintguy1980 · January 15, 2019

Shame the job has square footage requiring more than a single roll otherwise, I'd do a layer of standard 20% reflective and piggy-back that with a 20% exterior reflective product from Hanita. Seal all edge and done.