any roofers here? leaking gutter joints... sealant or tapes?

[bobbybo]

Hi, i have some plastic gutters on a block of flats, where i own 1 flat out of 6, looking to organise repairs on the leaks coming from the joints , mainly along the straight lengths some at corners, there are various products out their, CT1, gutter sealers, and some tapes, as well as waterproof roofing paints, would welcome any advice from experienced sources :-)

gather replacing the rubber joints is the best fix but the gutters are at least 25 years old im not sure of the chances of getting replacement seals

thanks

[Arthur Jackson]

If it's half-round gutter then it *should* be 112mm. If so, then you should replace the fittings. Any other way is a bodge and will not allow for the expansion which means it will just leak again or buckle the lengths.

[bobbybo]

thanks Arthur, il go past today & take a digital photo & see about getting the right seal if at all possible

[bobbybo]

where is the best palce to source replacement seals? or any roofer merchant? thanks

[mrmaggit]

Replacing the seals is the best bodge.

Look at the fittings, they normally have a manufacturers name moulded onto them. Post that up and I'll see what help I can be.

But really, replacement is the best option, guttering isn't expensive, you can even use the existing positions of the unions/outlets/etc to help you get the cuts done on the ground. This will also help you get some fall on the system.

Don't use tape, not only does it look bloody horrible, it fails very quickly.

Roof and gutter sealant is better, but is really designed for use when there are gutters of different materials being joined.

[swiftpete]

It'll cost you less than a couple of quid to replace each union. Any other way is a bodge and won't work long term as has been said. Just go to a building plastics place, somewhere that supplies fascia companies and ask for some gutter unions. They have to be the same type obviously. Put a picture up and I'll tell you what to get.

[bobbybo]

thanks all, PH never fails!

spec is MARLEY DEEPFLOW 110 X 75MM (RK01) (PAT NO 911851)

the rubber joint sealing strip measures 22cm x 4.6cm approx

could use a few brackets that hold up the gutters against the facia boards too, hopefully
this stuff will still be available somewhere

tried attaching pictures of the gutter joint and rubber seal that i removed to photograph, but the file size is too large to upload,

im at [e-mail] if anyone wants to see the pics i can reply to e-mail,

ill try to re size the pics meantime

[roofer]

Deepflow is still available and the gaskets will refix into the union channels. However, clean union thoroughly before re assembling. Using new union may not help as the existing may have shrunk and distorted after being up so long.

[Murph7355]

Don't bodge gutter fittings. It can potentially cost you dear.

[swiftpete]

It won't be a problem, just go into a building plastics supplier like I said ans ask for some of them. You can still get deepflow as has been said. They sell over the counter to regular people as well as fascia fitters. It will only cost you a couple of quid a bracket at most. I'd just get some new unions and fascia brackets rather than try to fit new rubber seals. It's easy enough to fit them.

[Arthur Jackson]

Marley Deepflow is, indeed, still available, however Marley changed the specification on it. It used to be a notched system and went over to clipped. I'm not sure the seals are the same.

[mrmaggit]

Paddy_N_Murphy said:

I have a leaky joint that must drive the neighbours nuts as it drips on the conservatory.
It is Old cast Iron jointed to Plastic.

It is also an impossible b'stard place to get to / access.
I can just 'reach' it from the window below and have tried a spray thing on it. Failed.

What you need to do is get access to the joint, separate the two parts, clean THOROUGHLY then reassemble,using roof and gutter sealant applied to the lower part, then push the upper part into it. It is essential that you use the correct one, as the gutter sealant has a rate of expansion/contraction of around 700%, less than this and the seal will fail.

You are also better off applying in several rows, rather than one big blob.