Concrete roofs

[ourmanflint]

There have been quite a few ICF builds on the UK Grand Designs show if anyone can get it

 

ICF Builds

[Yellowtail]

Our shop house has five floors of concrete planks, the top one doubles as the roof.

 

I think most shophouses are built like this and they seem to work out okay. 

[johng]

On 4/26/2021 at 6:58 AM, canopy said:

In Thailand people don't understand this and 2nd floor showers often leak down to the first floor

 

Example below

[KarenBravo]

Flat roofs in high rain areas always start to leak, eventually. They are generally used in areas of low rain-fall like North and East Africa and the ME. They also cause rooms below to become very hot.

Most countries that have high rainfall, or snow use steeply slanted roofs to shed rain and snow fast.

One of the reasons Thai style roofs are a good idea in this climate. Both for shedding rain and for the high volume of air for insulation.

Edited May 4, 2021 by KarenBravo

[canopy]

1 hour ago, KarenBravo said:

Flat roofs in high rain areas always start to leak, eventually

That would indicate poor design, common in Thailand.

 

1 hour ago, KarenBravo said:

[flat roofs] also cause rooms below to become very hot.

This also indicates poor design, again common in Thailand.

 

1 hour ago, KarenBravo said:

Most countries that have high rainfall, or snow use steeply slanted roofs to shed rain and snow fast.

For snow yes it can be a common approach. Steep roofs for rain? Thatching is the only type of roof I can think of that benefits from that. Modern shingles found in Thailand on the other hand do not even allow steep roofs.

 

[BritManToo]

My concrete roof is finished now ........ hope it doesn't leak!

 

[Yellowtail]

On 5/5/2021 at 10:57 AM, BritManToo said:

My concrete roof is finished now ........ hope it doesn't leak!

 

 

Looks great!

 

I think it funny the guys going on about how bad flat concreate rood are. I think they're great.

[HeijoshinCool]

On 5/4/2021 at 11:57 PM, BritManToo said:

My concrete roof is finished now ........ hope it doesn't leak!

 

.

 

Very nice! Thanks for posting.

[Don Chance]

On 5/6/2021 at 1:49 AM, Yellowtail said:

 

Looks great!

 

I think it funny the guys going on about how bad flat concreate rood are. I think they're great.

If they are if build properly.

First problem is that they absorb heat and making cooling cost higher. Concrete building generally are clammy and not very nice to live in.

Other problem is that concrete is a bit like sponge. Concrete it self takes a long time to completely dry out and harden.  Concrete absorbs water, humidity, moisture in the air or ground.

Concrete exterior surfaces should be treated with water proof coating, ie tar or blue seal. Concrete is not water proof. Tiles are also not water proof. There needs to be an underlayment underneath. As well treated annually with a sealant. Or else water will penetrate and do damage. Create MOLD.

If concrete roof collapse you will likely be killed.  So i would avoid building with concrete other than a prison cell or your basic foundations.

Edited May 19, 2021 by Don Chance