Vertical flue

[Thoggy]

Hi all
i am going to look at a combi swap job, the flue vents vertical through the roof tiles. I've not fitted a vertical before so my questions are; is the flashing kit on the roof universal or will I need to get a new kit with the new boiler also is there anything I should look out for?.
This may sound stupid but do I actually need to go on the roof?
Thanks Martyn.

 

[P J F PLUMBING]

As long as the lead slate is the right size and in good nic reuse it. As for the flue you have to change it def yes It will go down though the roof in to loft then you join onto it in side the terminal will not slide upwards. Hope this helps

 

[Thoggy]

Thanks for the reply mate, yeah I know I'll have to change the flue it was just the sealing onto tiles bit and as you explained ill need to get on the roof to feed the flue from the top? I've only ever cored them horizontally and don't want to miss anything or mess it up with leaks from outside.

cheers

 

[Destroyer2813]

What boiler you fitting as a lot of manufacturers do there own roof slates

 

[Ermintrude]

Timber for the flue to clip to. Flue clips. What you doing with conny And blow off?

 

[Thoggy]

Probablya logic mate or a Baxi duo tec he, it's a rental Property so something mid range and reliable. The roof is high obviously so how do people go about fitting the flue is it easy enough to get up and on some roof ladders or is it a scaffolding job?

 

[Thoggy]

It's a combi swap so I imagine prv is there and it's in a bath room so ill find a waste pipe some where.

 

[P J F PLUMBING]

Roof ladder if you got the balls if customers paying scaffold. You need to feed the flue though the lead slate and conect it up in the loft 2 person job depends

 

[Ermintrude]

Use a mac flash if ur on a budget. The two part ones u get on old wb, valliant and Vokera will work fine with Baxi and ideal, valliant flue has less of a lip on base of external bit. Will u need 45s if flue exits boiler off Center? Ply to fix boiler to?

 

[Thoggy]

I hate heights that's the trouble lol, not sure about the 45's will check the existing boiler when I have a look. What do you mean ply to fix boiler too?

 

[P J F PLUMBING]

I hate heights too very easy off a scaffold but £££

 

[Thoggy]

I'm not 100% sure I could get on the roof ladder so It might be scaffold or miss out on this one, a few hundred quid isn't worth falling off.

 

[Rickster123]

I'm not 100% sure I could get on the roof ladder so It might be scaffold or miss out on this one, a few hundred quid isn't worth falling off.

Send supper plum up there. Just pay his travel card. It's a win win!

 

[Roger Welton]

Get a roofer to do the bit up top, pay mine £50 well worth it even if its just 30mins work for him.

 

[mutley racers]

Use a mac flash if ur on a budget. The two part ones u get on old wb, valliant and Vokera will work fine with Baxi and ideal, valliant flue has less of a lip on base of external bit. Will u need 45s if flue exits boiler off Center? Ply to fix boiler to?

I thought you had to use a material of heat resistance to fit boiler on. like that fake asbestos on board. or is ply ok?

 

[Destroyer2813]

I either do mine myself of a roof ladder or get my roofer over if time scales work out, dont mind normal concrete tiles but leave slates to the roofer

 

[gassafe]

I thought you had to use a material of heat resistance to fit boiler on. like that fake asbestos on board. or is ply ok?

Most modern boilers can be secured to ply etc... Worcester Bosch I know for sure have said all there boilers can be mounted on combustible material because the shell does not go over a certain temperature.

I think its just old boilers that need fire board now, but maybe wrong!

 

[Thoggy]

I thought it had to be heat resistant, why would it need anything behind it anyway?
ill have a look when I go cheers for the pointers though everyone.

 

[anz]

Promat SUPALUX® - Promat UK Products - Leaders in Fire Protection

For those that don't know what your talking about.

 

[Destroyer2813]

I thought it had to be heat resistant, why would it need anything behind it anyway?
ill have a look when I go cheers for the pointers though everyone.

Think some people are assuming your putting the boiler in the loft as well not just running the flue through it hence why talking of fixing to something

 

[Ermintrude]

I thought you had to use a material of heat resistance to fit boiler on. like that fake asbestos on board. or is ply ok?

No ply is fine, check mfrs lit and or GS. If the walls are plasterboard, u cannot with any morals hang a boiler on plaster board fixings. Normally cut 3/4 ply the with of cupboard and fix to the studs in wall, normally in corners some times in middle too. U can use 3x2 one at top one at bottom of boiler and two for fixing pipes to ( avoids offsets and better fixing)

Some times boilers have different flue locations, seems that a lot of the new flue ports are 50mm further forward . Getting on roof is easy. Get a good ladder. If its a low pitch concrete time roof u can just walk up it. Slate and rosemary tiles require a roof ladder. Once u have done a few u will be fine. Don't get overconfident and also make sure some one is footing ladder when u get on and off roof ( that's most dangerous bit)

If the roof is concretetiles u can some times lift adjacent tiles to flue and simply work from inside and then patch up felt. .

 

[Thoggy]

Argh ok mate sorry no boiler in bathroom cupboard.

 

[MK Heating]

I'm scared of the roof, so Invested in some good long ladders, quite heavy so they are very stable. Tie them to the soffit at the top and the wall at the bottom, then put my cat ladder up and tie the cat ladder to the main ladder, takes time but well worth it. I deffo take someone with me if it's a vertical flue, the extra pair of hands make it 10x easier

If your near a gable end then take it up in the loft and horizontal across and out the gable if you are within the flue length limit

 

[SafeGasInstall]

some verticals are 5" just check if the old flue is same saize as new and you could reuse old flushing ,
if all they are the same get some silicon greese and apply on flue and rubber before you remove old one , have done few and never had a leak , if the roof is flat then even easier

 

[Thoggy]

The existing boiler is a ferrolia Modena, went and had a look today.
Thinking of putting in a logic or Baxi duo tec he.