Roof lantern - recommendations

[boxster9]

Thinking of placing an order for one of these - still undecided on the blue vs standard glazing.

[PositronicRay]

anonymous said:

[redacted]

Looks lovely, does the big glass area make that room cold?

[boxster9]

Thanks for the advice here. I have placed an order for the Roofmaker lantern.

It Apparently weighs 165kg and needs 4-6 people to move. Question for those that have one installed...how did you get it in place ?crane.

[Jamlar]

boxster9 said:

Thanks for the advice here. I have placed an order for the Roofmaker lantern.

It Apparently weighs 165kg and needs 4-6 people to move. Question for those that have one installed...how did you get it in place ?crane.

Ones we sell at work can be unglazed, lifted into place then reglazed.

Anyone else looking for Lantern, guy in Alton Hampshire does true frame less (bonded glass) lanterns - not sure how good they are though.

[V8RX7]

boxster9 said:

Thanks for the advice here. I have placed an order for the Roofmaker lantern.

It Apparently weighs 165kg and needs 4-6 people to move. Question for those that have one installed...how did you get it in place ?crane.

In reality that's two big men / 3 builders.

Two of us lifted mine on which was a little lighter - hop ups - trestle - scaffold tower - roof

A scaffolder lifted one of my large steel beams on by himself, he did look like a Worlds Strongest Man contestant

[boxster9]

Rechecked the weight with Roofmaker and it actually weighs 175kg, Will probably need to hire a crane of some form - the spider crane seems like it might fit the bill.

[Nice But Dim]

I am also considering the Slimline roof lantern from roof-maker

Our unit would be 1m x 1.5m and apparently weigh 65kg with usual double glazing - so should be easily man-handled.

I am no structural engineer but I am hoping that this unit could be installed into a 4.5m x 4m flat roofed wooden joist kitchen extension built in the 1980s without the need for steels etc.

Do you think this is realistic ? I would hope so as its only the weigh of an average person - and not a 150kg+ weigh of some of the units being mentioned here...

Thanks in advance for your counsel

[hyphen]

What size/span/centres are the joists.

And wouldn't you need to cut the joists and trim around them to fit a roof lantern too?

[Nice But Dim]

hyphen said:

What size/span/centres are the joists.

And wouldn't you need to cut the joists and trim around them to fit a roof lantern too?

You are of course correct - the joist would indeed need to be cut and trimmed to fit the unit. The only way I can determine the size/span/centres of the current joists is through the 7cm diameter holes of the down lights without ripping down the ceiling ! Hardly ideal..... but I'll try it...

[Nice But Dim]

hyphen said:

What size/span/centres are the joists.

And wouldn't you need to cut the joists and trim around them to fit a roof lantern too?

After some digging around we have determined the joists are 9" x 2" and 400 mm apart with a span of 4.5m

Which looking at this here http://www.home-extension.co.uk/tech2.html under Flat-Roof joists are within the max spans for C16 joists

The builder is suggesting his carpenter make the required adjustments without steels.

Does this sound viable for a lantern unit which weighs 65 kg ?

[hyphen]

Seems fine according to that table, if your builder is experienced and you trust him then I personally would not be worried.

[roofer]

Nice But Dim said:

hyphen said:

What size/span/centres are the joists.

And wouldn't you need to cut the joists and trim around them to fit a roof lantern too?

After some digging around we have determined the joists are 9" x 2" and 400 mm apart with a span of 4.5m

Which looking at this here http://www.home-extension.co.uk/tech2.html under Flat-Roof joists are within the max spans for C16 joists

The builder is suggesting his carpenter make the required adjustments without steels.

Does this sound viable for a lantern unit which weighs 65 kg ?

Double trimmer. It's not just the weight you are adding, it's the weakness you are introducing. You'll need at least 15" of timber there, 9 for the trimmer, and 6" for the upstand, not allowing for deck thickness.

[Nice But Dim]

roofer said:

Double trimmer. It's not just the weight you are adding, it's the weakness you are introducing. You'll need at least 15" of timber there, 9 for the trimmer, and 6" for the upstand, not allowing for deck thickness.

Thanks roofer. - much appreciated. Turns out the unit is nearer 110kg

i want to be sure I understand correctly - please can you confirm the following is appropriate for the weight

1/ the joist width of each side of the rooflight should be a minimum of 9 inches (excluding any orginal joists which may be present?).

2/ the addition joist width should be resting on the supporting walls (and not just bolted to any exisitng joists)

3/ you said 6 inches for the upstand. The Velux unit being installed (see below link) comes with an exisitng upstand which just rests on the deck. Or am I misunderstanding ?

https://www.roofingsuperstore.co.uk/product/velux-...


Thanks again

[AstonZagato]

anonymous said:

[redacted]

I have a huge lantern. It needed a huge crane to lift it over the house and into place. Nervous day.

[DanM75]

If anyone is looking at this thread and wants to buy a 3x1m Roofmaker lantern - I have 2 for sale which were put on my extension in error by our builders. They are fabulous contemporary high spec lanterns but were just too high for our roof and blocked the 1st floor windows. DM me for more details.

[dazm]

Might be interested but you don't allow direct emails apparently...
Where are you based and what kind of price are you asking for them? Got the specs?

[philwainsmith1]

Hi, appreciate this is an old thread but I haven't found anything more relevant.

I have a couple of 3x1 Roof Maker Luxlite fixed pitched roof lights and we're scratching our heads as to how best to lift and fit them. I'd planned to use vacuum lifter but just found out they can't be lifted by the glass. Straps is the next thought but I can't see how we'd get the window off both the straps and the little bits of timber they've attached.

Does anyone that has installed big Roof Maker windows with a crane have any advice?

Thanks

[AstonZagato]

Not really - but cranes can do most stuff

[philwainsmith1]

I wish it was that simple. The pitched roof Luxlites have a tray flashing around the frame edge that is too flexible to strap directly around.

[AstonZagato]

Build a cradle in wood that protects the flashings?