my old roof leaks, its asbestos cement, ive researched how best to remove and dispose of it, but im having trouble finding what to replace it with. I think i just want corrugated plastic sheets, is this ok for the job? What are they called properly, as i cant seem to find much. Or is there anything better to use?

Cheers!

You are better off using the aluminium ridged sheets with a layer of foam in, if you know what i mean? They wont get condensation inside then.

You can get it from builders places usually on order.

ok, so asbestos isn't ideal, and you'll want to get rid of it, but if your main concern is the leak, why not give it a fibreglass layer?

i went even cheaper on mine, and when the tar felt roof started leaking, we just filled the leaking joints with resin. its holding it as a good temporary repair, but doesn't cure very well to tar, but it has been there 2 years now and doing alright

stopping the leak is the main thing, i would just put layers over it but the ridges probably wouldnt match. Would some sort of paint work?

before we tried fibreglass, we tried bitumen 'paint' Its expensive, but can be bought from B&Q and the like. we paited it over the whole roof with a broom, but it started peeling off. not sure how well it would work on asbestos. asbestos goes a bit powdery doesn't it?

I painted my cracks over with left over topcoat from my extension fibregalss roof. Mostmof them were in the troughs of the corrugations so a good thick coat cured the leaks (untill the next time someone climbs on it)

You call your roof material 'asbestos cement'. My, non expert, understanding is that your description overlaps 2 materials.
There is obsolete asbestos roofings sheets, with 3" or 6" pitch corrugations.
Unless cut or broken to make dust this material is a low risk form of asbestos.
There are also fibre cement roofing sheets in the same profiles which are currently available. Since the grey colour is similar to asbestos it is not easy to tell the difference. There is probably writing on the underside of the sheets. I used this material on the roofs of 2 buildings I put up in 1986 and 2000. So the asbestos went out of use prior to 1986. I have found the fibre cement to be a good material and not prone to cause condensation.

HTH.

Mal

On a similar tack......

has anyone made a shingle roof covering?

SWMBO likes the look of them for our new garage.

Cheers

Chris

I made mine using the corrugated plastic stuff from focus. It held up all winter through the bad weather and doesnt leak at all.

I am jn28 m1 if you wish to come look at what I have done

Carl

i got the phrase 'asbestos cement' from google, when i searched for 'asbestos garage roof'. I know it depends on age as to whether it contains asbestos or not, but that doesnt concern me too much as it can be safely removed either way, but if i can stop it leaking then i'll keep it. Main priority is to get a dry garage so i can install a perminant build table!

cheers for the help all!

look into sheeting with osb(orientated strand board)then covering with a felt based tile product a company called bardoline( i think) do them in various colours and styles last few garages i have done i did with this system to look like grey slates-works out at just over a tenner per sq/m plus your board.biggest bonus its fast and easy to lay.hth rich




ps i know its stocked somewhere in leeds as every time i order it(via jewsons)it comes from leeds.

[Edited on 24/5/07 by ruskino80]

I helped sort out a guy from work garage in a similar situation.

The best way we thought out of it was to remove or extend the original bolts into wooden battons ontop of the roof.
Fill imbetween the new battons with Polystyrene or fiberglass and then put a metal clad roof over the top.
Then you get new deeper edeging made of the same stuff as the roof to extend down from the new roof and cover the existing weatherboards. The company he got the roofing materials off supplied everything! the sheets, edeging, profiling to fit under the corugations, the screws and caps, rivets etc

I think it cost about £400 (really not sure) in the end but he said it was worth it.. stuff not getting damp.. much much warmer..much more likely to go out and get some work done!

[Edited on 24/5/07 by MkIndy7]

I used Wickes corrugated bitumen sheets on my shed roof.

my asbestos cement roof was leaking a couple of years ago - several cracks running in the ridges. I fixed it short term with that bitumen paint stuff, but the crack just ended up appearing elsewhere!

My next plan was to replace it with that corrugated bitumen sheeting from B&Q. Worked out I'd need about 100 quids worth. Plus I'd need to find a way to tip the old roof (either double-bagged and hire a van to take it to a registered tip, or pay "asbestos specialists" a fortune). I then didn't have confidence in myself getting it all stripped off and replaced in a day, risk of rain etc etc. Eventually got a company to come and replace it for me with corrugated cement (looks basically the same but no asbestos). Cost a shade over 200 quid I think. Worth the extra 100 quid for knowing it was done properly. It took them about an hour end-to-end

The cement sheeting is better than e.g. aluminium (you get condensation on the inside) or plastic (can get very hot inside!). Provided that the pitch of the roof is enough so you don't get seepage of course

If you want I'll dig out the name of the company I used - they're based in Bramley I think, Joel so reasonably close.

[Edited on 25/5/07 by gingerprince]

When I had a leak in my old workshop roof I used brush on seam sealer in the cracks , still good after 10 years .

quote:

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Originally posted by gingerprince
The cement sheeting is better than e.g. aluminium (you get condensation on the inside) or plastic (can get very hot inside!). Provided that the pitch of the roof is enough so you don't get seepage of course
[Edited on 25/5/07 by gingerprince]

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cant believe i still havent fixed this

i think im going to put some marine ply over the top and paint it with floor paint. Dirt cheap!

If the roof is porous without gaping holes the best stuff of the lot is Acripol or Flexacryl. About 25quid for 5ltres. It brushes on and is superb. Another method is SBR (Styrene Butadiene Resin).

Mix this with 30per cent water and some dry cement to a paint type consistency.........brush it on. Works well.

Old asbestos roofs lose the cement content through the years and become porous.

Alex

i must have fibreglassed at least a 100 garage roofs , if you have some decent roof beams , sheet it then fibreglass it .

otherwise you could coat the whole thing in a polyurethane sealant with embedment coat , not cheap at£150 for 20 litres but enough to do your roof and to last 10 years tho . can do it in inclement weather also .

crop the bolts off tho if theyre poking up .