Corrugated tin on domestic dwelling installation?

[redcoo235]

Hi, looking for some advice. About to reroof a building which connects on to our farm house. buildings are currently slated but have terrible nail sick and many of sarking boards are slipping. Trusses are in good nick. Was wanting to strip slates and reroof with plain galvanised tin 0.7mm. My concern is with condensation building on tin and how to get rid of it.

Should I resark the roof and but a breather paper down? Have looked at tyvek metal roof paper which drains water down to the gutters but not recommended for flexible metal roofing, more suited to flat sheet metal ie zinc, stainless steel etc.

Or do i but vapour backed drip stop tin and just fit purlins to the original joists? The building will have a 100mm kit built inside the walls with a insulated ceiling so structure will have a "cold roof" design.

Realise tin not everyones cup of tea but i like the look of it with veluxes fitted in it for windows, and had prices for re-slating and just not affordable for what we want to do.

Any advice greatly appreciated. Cheers, John

 

[Courier]

Metal Roofing Sheets & Cladding UK Manufacturer

High quality manufactured Metal Roofing Sheets, Corrugated Sheeting and Steel Roof Sheet supplies. Stocking roof accessories, fixings, Z Purlins & gutters.

phoenixsteels.com

Might be some good tips on this and other NZ / Australian roofing websites where Corrugated Iron / Wriggly Tin is the norm...

 

[steveR]

Hi, looking for some advice. About to reroof a building which connects on to our farm house. buildings are currently slated but have terrible nail sick and many of sarking boards are slipping. Trusses are in good nick. Was wanting to strip slates and reroof with plain galvanised tin 0.7mm. My concern is with condensation building on tin and how to get rid of it.

Should I resark the roof and but a breather paper down? Have looked at tyvek metal roof paper which drains water down to the gutters but not recommended for flexible metal roofing, more suited to flat sheet metal ie zinc, stainless steel etc.

Or do i but vapour backed drip stop tin and just fit purlins to the original joists? The building will have a 100mm kit built inside the walls with a insulated ceiling so structure will have a "cold roof" design.

Realise tin not everyones cup of tea but i like the look of it with veluxes fitted in it for windows, and had prices for re-slating and just not affordable for what we want to do.

Any advice greatly appreciated. Cheers, John

I built a house in the early 90s and put Eternit coloured fibre cement sheets on the roof. So same sort of look...

Roof was a sandwich.

Roof Sheets
Tyvek
Plywood deck (on some of the roof area for convenience)
150mm Rockwool
Breathable membrane again
Plasterboard

Looked at steel at the time, and a local roof/cladding specialist advised that insulated steel was the best, as as it reduced noise a bit as well. Agree a cold roof is easier to deal with!!

 

[MD @Minshall Buildings]

I built a house in the early 90s and put Eternit coloured fibre cement sheets on the roof. So same sort of look...

Roof was a sandwich.

Roof Sheets
Tyvek
Plywood deck (on some of the roof area for convenience)
150mm Rockwool
Breathable membrane again
Plasterboard

Looked at steel at the time, and a local roof/cladding specialist advised that insulated steel was the best, as as it reduced noise a bit as well. Agree a cold roof is easier to deal with!!

My only comment would be also be noise if opting for a steel roof sheet of any type. Under heavy rain they can be very noisy indeed if not well insulated below!

 

[Courier]

My only comment would be also be noise if opting for a steel roof sheet of any type. Under heavy rain they can be very noisy indeed if not well insulated below!

Having lived in a Corrugated Iron roofed dwelling house in NZ for a good while and through a few atrocious rainstorms I can confirm that they do not need to be any noisier than any other roof...

 

[Exfarmer]

I stayed in the jam factory inHobart. Tasmania and can definitely say that corrugated iron is not good for sleeping under during a storm!

 

[Forever Fendt]

Free air flow and movement above the insulation and below the roof will be key