Asphalt box gutter

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29 May 2006
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Our rear flat roof asphalt box gutter has slipped and is rippled in places. It has bubbles.

Any ideas, why I have this situation? What can I do to make it all smooth and sound again?

I would appreciate your advice.
 
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Hi. Are you sure its asphalt? As it is normally 20 mm thick . Its specialist work to lay and repair. As such contractors will need to be contracted. Good Luck
 
Here are my pictures of the box gutter. I think it is asphalt. I am concerned about the bubbles - not knowing the reasons that might have caused it to go like that.
 
Here are my pictures of the box gutter. I think it is asphalt. I am concerned about the bubbles - not knowing the reasons that might have caused it to go like that.
 
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looks like torch on cap sheet painted with solar paint.

time for a new gutter methinks theres lots of different products on the market now, though i personally prefer lead.
 
Are you suggesting removal of the existing cap sheet and to have a new lead box gutter?

Due to the cost restraints of having a 6 metres long replacement lead box gutter by a professional in London, I may have to look for alternatives. Most probably, lead would look nice and last a very long time. My budget for this project is £250.

If the removal of the old capsheet was achievable without damaging the substrate or anything else, is Wickes' Easy Seal Capsheet a good DIY alternative solution for my box gutter?

Does the removal of the old capsheet require any special tools or expertise?
 
It looks like the leaking gutter was repaired by just floating a new layer on top, which a few years of sunshine has softened and relieved stresses, unless something is rotting underneath.
I wouldn't go for an easyseal. Get the Wickes big cans of black gloop and traditional felt or a reinforced variety. This gloop is fantastic stuff, but at this time of year very stiff. Soften it by sitting it in a big cardboard box for insulation and pointing a paint stripper at the surface. Once at the right consistency (margarine) apply it with a paint scraper.
 
Thank you Bazbee. Your recommendation sounds interesting for me.

As regards the possibility of rotten timber underneath, it is probably best to eliminate that possibility first before my repairs.

I will ask the shop underneath to check to see if his ceiling is showing any signs of it.
 

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