Profile Metal Roof Condensation

Profile Metal Roof Condensation

Author
Discussion

orbit123

Original Poster:

240 posts

191 months

Tuesday 26th September 2017
quotequote all
I'm in middle of building a large log store. It's going to have a box profile metal roof, open front and slatted timbers on the sides.

I see a suggestion to use a dripstop material on the underside of metal roof sheets to stop drips from condensation but the local supplier (cheapest delivery!) says they don't do that and suggest an insulated sheet to stop condensation.

As this is a log store the underside of the roof is open to the elements - I can't really see much point in an insulated sheet? The top and bottom will be much the same temperature when cold?

The idea of the dripstop material is to hold any water until the day warms a bit and it evaporates - my roof should have the wind blowing under it to some extent though so not sure if this is needed?

Any ideas on what is best - insulated, material underneath or nothing at all?

Thanks.

Lotobear

6,232 posts

127 months

Tuesday 26th September 2017
quotequote all
you can get sheet with a fleece condensation control layer on the underside but your structure is unheated and open at the sides so condensation will almost certainly not be an issue in use.

clockworks

5,292 posts

144 months

Tuesday 26th September 2017
quotequote all
Not sure that condensation or dew won't be a problem. We have a nice metal roof outside at work (petrol station forecourt canopy), and the amount of water that drips off it onto the customers in the morning is crazy.

Why not just use wood and some roofing felt for the log store roof?

sparkythecat

7,898 posts

254 months

Tuesday 26th September 2017
quotequote all
In the open air, with plenty of air circulation , you shouldn't have a problem.

Lotobear

6,232 posts

127 months

Tuesday 26th September 2017
quotequote all
I suppose you might get a transient issue after a cold or frosty night due to the thermal mass of the metal until the temperatures equalise but for a log store I really don't think you have anything to be concerned about

Eddieslofart

1,328 posts

82 months

Wednesday 27th September 2017
quotequote all
Lotobear said:
I suppose you might get a transient issue after a cold or frosty night due to the thermal mass of the metal until the temperatures equalise but for a log store I really don't think you have anything to be concerned about
This.

Eddieslofart

1,328 posts

82 months

Wednesday 27th September 2017
quotequote all
Lotobear said:
I suppose you might get a transient issue after a cold or frosty night due to the thermal mass of the metal until the temperatures equalise but for a log store I really don't think you have anything to be concerned about
This.