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Tinbum

Back garden ridge vent.

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Tinbum

This will be like a build thread only much smaller. I hope it shows you that anyone with a bit of brains can do wonderful things in your garden!

 

 

A client has a house that has a large two storey open area with a mezzanine off to the side. the ceiling is fully boarded with vents near the apex.

 

There is a major heat difference between the ground floor and up on the mezzanine. Cross ventilation is possible at the ground floor level.

 

 

It appears the heat is gathering in the interior peak, venting into the void between ceiling and roof, but roof has no ridge vent system. There are vents in the lower eaves but nothing up top. So it seems the heat is rising but can not escape.

 

 

"What you need is a ridge vent Sir" was met with what is one of those looks. Google does not show up any suppliers of such anywhere in the Philippines. Sooooo, solution is to make one. Decided to build an 8 foot long one and place it central on his ridge line.

 

 

Eight feet as it is the length of a sheet, simple.

 

 

Had two profiles folded. One is the inner profile which will be fitted to the roof. This contains the vents.

 

The other is the cover piece which simulates a covering roof and protects the inner vented portion.

 

 

A quick sketch was done and taken to the local roofing supplier who folded these up.

 

post-13865-0-43748000-1424506961_thumb.jpgpost-13865-0-54276700-1424506985_thumb.jpg

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Tinbum

post-13865-0-52773100-1424507181_thumb.jpgpost-13865-0-05813000-1424507187_thumb.jpgAs you can see I have marked out the vent outlines on the inner portion. Both profiles were folded 8 feet long but the inner is being cut back 4” in length so that the cover profile overhangs all around.

 

Edited by Tinbum
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RogerDat

Greetings! So the red marked area will be cut out?

Have you installed it yet, if so please post pictures when you do.

Looks like what I need.post-7667-0-10234800-1424510019_thumb.jpg

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Buko Beach

Seems like a nice fix.

 

Can you post a few pics of the installation process and finished product/look

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Headshot

OK...so this is a roof vent you are building. What does that have to do with a garden?

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Paddy

What does that have to do with a garden

 

You get a great view of the garden when you are sitting on the roof installing the ridge vent...

 

Am I right in thinking that this ridge vent will actually vent from the ends of the upper part? I can see how lower part works but once covered by the upper part?

 

The types produced in NA mostly seem to sandwich some sort of breathable, insect/critter resistant material between lower and upper parts and hence vent all along the ridge.

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Tinbum

As the sheet used is paper thin, I decided to make some internal stiffeners for the vent portion. These will go in the not cut our areas to try and add a bit of stiffness.

 

 

Bought some 1” x 1/8” flat bar and folded up the internal braces, a simple horse shoe shape. However they need to not protrude too low and foul the roof surface and also to be a good fit inside the sheet profile. They will be riveted in place.

 

 

As I do not have a big bender, I looked around and spied a garden gate with a sliding bolt. This is my basic bender.

 

But first I decided to weaken the steel by hacksawing halfway through on my bend lines. This allows it to bend crisper and at a given point.

 

post-13865-0-90557800-1424512472_thumb.jpgpost-13865-0-52731200-1424512493_thumb.jpgpost-13865-0-05304700-1424512507_thumb.jpg

 

 

 


 

 

 

Edited by Tinbum

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Tinbum

As it had to fit snuggly inside the profile, we must allow for a “bending allowance”. This is basically at whatever point we bend, the object will end up 1 thickness longer that the bend mark. See the close up pic and you get the idea.

 

I wanted an 8” overall so for the simple C form, between the two cuts is 8” minus 2 thicknesses. Thus 8” minus 2 x 1/8” so 7 ¾” cut to cut. Simples!

 

 

Fitted on the outside of the vent profile, directly on top of the internal braces will be the bracing that supports the cover profile.

 

This has a simple Z bend which is done the same way with the same working out.

 

post-13865-0-50886700-1424512820_thumb.jpg

 

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Tinbum

Now back to that garden gate. By using the gap between the sliding bolt and the gate frame, we have a very simple but effective bender. Its securely attached, won’t move or wobble and it also doubles as a rather boring gate!

 

 

Place the steel into the gap with the cut facing up to you and gently push downwards, opening up your cut. The remaining steel will fold nicely along the cut line.

 

 

post-13865-0-48040200-1424512920_thumb.jpgpost-13865-0-10287500-1424512938_thumb.jpgpost-13865-0-53352800-1424512952_thumb.jpgpost-13865-0-20491400-1424512958_thumb.jpg

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Tinbum

For the second of the Z bends I have shown two different ways to do it again using the gate as our bender.

 

First one traps the Vice grips between the sliding bolt and gate frame, thus not allowing them to twist when we bend the steel.

 

post-13865-0-40905300-1424513063_thumb.jpgpost-13865-0-82782600-1424513069_thumb.jpgpost-13865-0-69920100-1424513081_thumb.jpg

 

The second is a very traditional way which is self explanatory.

post-13865-0-25596000-1424513096_thumb.jpgpost-13865-0-70866400-1424513106_thumb.jpgpost-13865-0-41234500-1424513115_thumb.jpg

 

As you can see, with carefull marking out and cutting, you can make multiple items exactly the same size!

 

post-13865-0-28933700-1424513126_thumb.jpg

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Tinbum

Once bent up we need to weld the corner where we cut to give it back its strength. My welder fits in one of those cheap plastic crates as does the helmet, rods etc.

 

This welder is an inverter type and will run all day burning 3.2mm rods. You can see the size of it compared to the item of safety footware!

 

 

This machine also has TIG capability hence the gas nipple in the bottom middle and the MMA/ TIG switch. 

 

post-13865-0-29861700-1424513398_thumb.jpgpost-13865-0-09403300-1424513412_thumb.jpgpost-13865-0-00666200-1424513420_thumb.jpg

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Tinbum

To run a weld in a corner is difficult but if propped up so the corner is uppermost with the two legs at 45 deg, it is so much easier. One just has to hunt around for suitably tall items.

 

For the Z bend, some welds are done at the elevated end and others at the ground end, but always at the 45 deg position for ease!

 

 

post-13865-0-43018500-1424513520_thumb.jpgpost-13865-0-50100300-1424513534_thumb.jpgpost-13865-0-80734100-1424513547_thumb.jpgpost-13865-0-49387300-1424513555_thumb.jpg

 

After cleaning up, I noticed that I had a bit of penetration or burn thru at the start and finish of the runs on the outer Z bend leg. As the cover profile fits snuggly into this corner, I needed to remove these blobs with a file.

post-13865-0-96529800-1424513699_thumb.jpgpost-13865-0-26653500-1424513709_thumb.jpgpost-13865-0-54331200-1424513715_thumb.jpg

 

Notice also I rounded off the sharp corners and edges quickly using the grinder. I have been cut by steel too many times!!!

post-13865-0-91001300-1424513724_thumb.jpg

 

Finally after welding a check with an engineers square just to check things out.

post-13865-0-73406200-1424513737_thumb.jpg

Edited by Tinbum
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Irenicus

 

 

. There are vents in the lower eaves but nothing up top. So it seems the heat is rising but can not escape.

 

It seems like most homes here have eave vents but no provision for ridge venting.  I can understand the whole horizontal rain worries, but there's got to be some way around that.  

 

Thanks for posting this, and I look forward to it's completion.

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Paddy

eave vents but no provision for ridge venting

 

 

Agree - but they mostly don't even have roof vents either. Both my partner (who I wouldn't really expect to know about this stuff) and her brother (who built our house and who ought to know) thought that hot air goes down out of the soffit vents and that venting at the top of the roof was "strange".

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hyaku

I used to extract the hot air from the roofspace with fan. Since I insulated I really dont need any fancy methods. Quite soundproof as well.

 

Thin metal here will quickly rust where it has been bent.

Edited by hyaku
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