Garage roof replacement

It's new roof time for ther garage - the concrete sheets have had it and it's leaking like a sieve.

It's a gently sloping roof approx 33 x 15 foot - I was thinking possibly of a box section metal roofing for this but apparently they 'sweat' and drip?

Any recommendations for materials and supliers in around Bucks (Aylesbury)?

Reply to
Buzby
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I'm doing a similar thing out here in Ireland - the supplier poited me at a special type of box section called 'Condri' - which is apparently a fabric applied to the underside of the box section

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adds about 30% to the cost of the sheeting - but if it saves everything from getting dripped on then it's worth it...

I also have one of the prefabricated metal sheds (Yardmaster) - which has conventional metal sheeting on it - I lined the inside of that with expanded polystyrene to insulate and reduce the condensation..

Adrian

Reply to
Adrian

Thanks for that - oddly enough I'm in the middle of putting up a yardmaster shed - got it half built - roof done - sides up - then a gale came and wrecked the sides - need to order some more bits and get the roof on PDQ!!

Reply to
Buzby

Yes, that's true - I can vouch for it's effectiveness. It's like a flock coating on the underside. I have it on a steel profile sheet roof and have never had a drip off it over two winters. When we fitted it we were advised to strip the coating back about 100mm from the ends of the sheets at the eaves so that any water dripping over the edge of the sheet wouldn't get absorbed into the coating and creep back up.

You can read about it here

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Reply to
Neil

I have seen similar stuff.. it absorbs the condensation. However there must be a limit to how much it can hold and will drip if it is reached. I don't know if it would last a few days with ice/snow on the roof and a thaw started without dripping. You could put a dehumidifier in if it started to drip so it dried out.

Reply to
dennis

I'm not 100% impressed with my Yardmaster shed. It's the big 'garage' one - absolute pain to assemble - had to go buy extra screws (while the roof was half on & half off!) 'cos they didn't supply enough of them - and there were numerous pressings without the necessary holes punched.....

Replacing it is on my 'to do' list.... Having said that - it was cheap - but if I'd know how tacky is was going to be I'd have saved my money and done the job properly... once....

Adrian

Reply to
Adrian

Ah - that's interesting - thanks..... My project is just a little sort of 'lean-to' on the end of a 12' x 24' timber shed / studio. It'll cover up the rather ugly/exposed well-head & associated electrickery, and give me somewhere to store the heavyweight market stall equipment & the ride-on mower - thus releasing some space in the other (Yardmaster) tin shed so there's somewhere to work and store 'stuff'. Ain't life complicated ?

Did the magic coating just peel off ? Stanley knife across the sheeting & then tug ?

Thanks Adrian

Reply to
Adrian

All possibilities, I guess.... but we don;t get snow out here.....

Part of the new structure will be over our drinking water wellhead (when we've had a good dose of rain the water actually overflows up the well-shaft of its own accord ) - but I was going to arrange some kind of semi-sealed arrangement round there and add some air-vents in the side of the lean-to to try and reduce the opportunities for condensation..

Adrian

Reply to
Adrian

I've done a couple of garages using insulated box section steel sheets, and been very happy with the results. These are the things you see being used for new builds on industrial estates and the like. Kingspan is one well-known brand, but there are several more. They come in various thicknesses of both steel and insulation, two or three outside finish materials, and many colours. Some types clip together, but most are fastened with Tek screws through the valleys. You might have trouble managing 33ft sheets, but if it slopes the other way you're laughing. End joints are OK, but need to be over a purlin and well sealed. If the roof is reasonably accurate (no big hollows), you could perhaps use a slightly lower pitch than the makers recommend, say down to 3-4 degrees, particularly if you've only got side laps, and you seal them. As with all roof work, correct detailing of verges and eaves is vital.

Keep an eye on ebay for sheets, as there seem to be a number of suppliers who pick up surplus sheets from big contracts, but beware of "from" prices - colours and thicknesses may be mixed, and lengths may not be what you're after.

Not the cheapest solution, but you'll have a warm and drip-free garage.

Reply to
Kevin Poole

No it was stuck on very well. We had some gun wash (low quality cellulose thinners) to hand so it was - score with Stanley knife, slap on some thinners with a paintbrush, and it just slid off. I would definitely use the same stuff again on a roof. We do get snow/frost here (north Scotland) but snow soon slides of a tin roof with any pitch and as soon as the sun gets to the frost it melts. As I say, I've never seen any drips of damp patches.

Neil

Reply to
Neil

Just to throw in another option, I used Onduline for a shed roof recently and have been impressed. I laid it over OSB board. I was going to felt but the cost for Onduline was no greater than the materials for three layers of felt and the installation effort was minimal in comparison.

Rob

Reply to
robgraham

Worth a look for all sorts of roofing stuff

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Reply to
The Medway Handyman

Thanks - just what I was after - also realistic delivery charges!

Reply to
Buzby

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