Joined: Jun 2018 Posts: 517 Threads: 90
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To minimise damp and condensation in my new wooden garage, I am considering boarding it out and using foil backed bubble wrap between the wall and board. I shall do the same on the roof with some sort of rubber floor covering. Has anyone else done this and, if so, was it effective? There will still be air flow under the doors. I know that it will not be as effective as Kingspan or Rockwall.
Jamie.
Joined: Aug 2018 Posts: 190 Threads: 5
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Location: Dorset seaside
I have done mine with Kingspan (expensive but effective ) and painted the floor with Screw fix floor paint.
Joined: Aug 2017 Posts: 1,808 Threads: 99
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hi jamie,
ive done simular in my barns, i couldnt accept the prices of doing it properly.
i used polistyrene sheets in the walls, it keeps the drafts from between boards etc.
and gym matting from ebay for the floor.
i just ordered some more for the barn recon thread im doing.
but do remember any shed that is not heated, the temp will gradually drop with the outside temp. as you say you will still have the air flow under the door.
were insulation works well, is with just a very small heater. you will feel a large difference inside the garage.
tony
Joined: Aug 2017 Posts: 1,974 Threads: 90
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Location: Ripon
The advantage with Kingspan is ease of fitting and the reflective layer. Pricey but good. Condensation is always a major problem so do make sure you get a free movement of air where possible and necessary.
Joined: May 2018 Posts: 2,091 Threads: 109
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Location: Llandrindod Wells
Car type: 29 Special, 30 RK, 28 C Cab
Hi Jamie
We recently had a small leak in our house roof. The builder commented that our plastic felt wasn’t used any more due to condensation problems.
I think wherever you put an impermeable barrier there is the possibility of condensation. On a summerhouse I built some years ago I used “building paper” behind the joists, simple glass fibre loft insulation between and match board internal lining. Had no condensation problems.
It’s all down to dew points which is perhaps a bit complex for a simple shed. I’d avoid bubble wrap if I were you as it doesn’t provide a huge amount of insulation and provides an impermeable surface against which condensation can form.
Cheers
Howard
Joined: Aug 2017 Posts: 725 Threads: 38
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Location: Herefordshire
I've built high-end timber garages for a living for 35 years. They're great for classic and vintage cars, as properly constructed they should be very dry.
The critical thing is to allow the timber to breath. Don't line the building with anything impermeable.
My own preference is 50mm fibreglass insulation, with a 9/10mm ply lining - neither very expensive in the great scheme of things.
Joined: Jun 2018 Posts: 517 Threads: 90
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Thank you for all of the suggestions and advice. I shall have a proper think and look at the different suggestions before starting. I need to let the place dry a bit first, though. It had obviously been on the lorry over night and been rained on. The floor is quite damp, although the walls and ceiling seemed to have dried pretty much.
Regards,
Jamie.
Joined: Sep 2017 Posts: 175 Threads: 66
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I've used foil backed bubble wrap in my garage for the roof and it's brilliant, what do people use for heaters in the winter ?
Joined: Apr 2018 Posts: 82 Threads: 12
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Be careful if using polystyrene insulation near electrical cabling, it causes the PVC insulation to migrate over time, I have seen it where there are only bare conductors left after a number of years. (Also mice seem to like it!)
I used a mixture of leftover Kingspan type insulation from our kitchen extension and fibreglass insulation.