House Constuction [Merged]

[kagalingan]

Open the windows to curb Covid spread: experts

Open the windows to curb Covid spread: experts - Health - The Jakarta Post

Open the windows to curb COVID spread, say experts


Police officers look out the windows of a public housing tower, locked down in response to an outbreak of the coronavirus disease (COVID-19), in Melbourne, Australia, July 8, 2020. (REUTERS/Sandra Sanders). Usage: 0 (REUTERS/Sandra Sanders)

Kelly MacNamaraAgence France-Presse
Paris, France / Thu, April 15, 2021 / 09:45 am


PARIS — Opening windows and ventilating spaces should be at the heart of efforts to prevent the spread of COVID-19, a group of experts said Thursday, arguing that confusion over airborne transmission meant this simple measure was being overlooked.

Mounting evidence convinced many places to adopt mask-wearing recommendations and health authorities have for months said that crowded, badly ventilated indoor spaces are a particular risk.

The virus is most likely to spread through inhalation at close range rather than through contact with surfaces or at long range, said respiratory experts said in a commentary published in the BMJ medical journal.

But despite this, the role of aerosol transmission gets “only a cursory mention in some infection control guidelines.”

“People are much more likely to become infected in a room with windows that can’t be opened or lacking any ventilation system,” they said.

The authors, including Julian Tang from the University of Leicester and Linsey Marr from Virginia Tech, said part of the problem has been a lack of clarity in the definition of terms such as “droplet” and “airborne” when describing transmission.

“Essentially, if you can inhale particles — regardless of their size or name — you are breathing in aerosols,” they said.

“Although this can happen at long range, it is more likely when close to someone, as the aerosols between two people are much more concentrated at short range, rather like being close to someone who’s smoking.”

At the beginning of the pandemic, health authorities, including the World Health Organization (WHO), discounted the possibility that simply breathing could send infectious micro-droplets into the air.

But they did a U-turn as experts piled on pressure and evidence mounted.

The BMJ commentary said precautions like wearing masks, keeping one’s distance, and reducing crowding in indoor spaces would all help curb viral spread, whether it was through inhaled particles or direct contact with surfaces.

But it stressed that a crucial difference was “the need for added emphasis on ventilation because the tiniest suspended particles can remain airborne for hours, and these constitute an important route of transmission.”

In March, the WHO released a guidance document encouraging better ventilation in buildings.

It said that while “knowledge gaps” remain, the transmission of the new coronavirus SARS-CoV-2 that causes COVID-19 is particularly effective in crowded, confined indoor spaces where there is poor or no ventilation.

Bakit ang isang tree hugger behaviorist kagaya ko eh tinatalo ko dsikarte ng engineer architect interiior designer eh napakabasic nito. FLOW OF THE AIR!!!!!

Ang dami mali sa design ng mga bahay ngayon. Lalo na yung gated type salubong townhouse eh barado hangin.

Tsikoteers paano ba yan mga views tumutumpak na naman!!!!

Am I troll?????

[Dr.Kamiya]

Balik topic ulit sa cooling:
Whitest-ever paint could help cool heating Earth, study shows | Environment | The Guardian

The whitest-ever paint has been produced by academic researchers, with the aim of boosting the cooling of buildings and tackling the climate crisis.

The new paint reflects 98% of sunlight as well as radiating infrared heat through the atmosphere into space. In tests, it cooled surfaces by 4.5C below the ambient temperature, even in strong sunlight. The researchers said the paint could be on the market in one or two years.

Dunno why nawawala to sa isip ko pag dating sa bahay, but white = cool is such common sense sa cars it should have been obvious.

[BratPAQ]

Balik topic ulit sa cooling:
Whitest-ever paint could help cool heating Earth, study shows | Environment | The Guardian


Dunno why nawawala to sa isip ko pag dating sa bahay, but white = cool is such common sense sa cars it should have been obvious.

Whitest ever is not white paint? Parang bang white version ng vanta black?

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[Dr.Kamiya]

Whitest ever is not white paint? Parang bang white version ng vanta black?

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The big factor is it rejects UV which regular white paint still absorbs. This is what allows it to cool below ambient temp.

[dr. d]

The big factor is it rejects UV which regular white paint still absorbs. This is what allows it to cool below ambient temp.

my two concerns,
1. price; and
2. longevity.

[papi smith]

Problema nyan is village restrictions, here, we are allowed to choose from 6 colors only, bawal pa ang pareho magkatabi and white is not in the choices. With regards to roof, we are required to use asphalt shingles, wala ring white nito hehe

[dr. d]

Problema nyan is village restrictions, here, we are allowed to choose from 6 colors only, bawal pa ang pareho magkatabi and white is not in the choices. With regards to roof, we are required to use asphalt shingles, wala ring white nito hehe

... strange policy...
but what do i now.
i don't live in a protected enclave.

[CVT]

Problema nyan is village restrictions, here, we are allowed to choose from 6 colors only, bawal pa ang pareho magkatabi and white is not in the choices. With regards to roof, we are required to use asphalt shingles, wala ring white nito hehe

Wow! Sobrang restriction naman bro - requiring asphalt shingles only for the roofing?

[papi smith]

Yes Sir CVT, in fact, may lower roof ako sa likod, hindi naman kita sa kalsada, pero shingles pa rin, sa gate pa lang di na makakalusot ang long span. Ung kulay ang malupit, kasi the only color my wife likes is the same as our neighbors, yun lang ang di nasunod sa gusto nya [emoji38]

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[dr. d]

now, my interest is piqued.
can you pm me that village, po?

[Papajamba]

Problema nyan is village restrictions, here, we are allowed to choose from 6 colors only, bawal pa ang pareho magkatabi and white is not in the choices. With regards to roof, we are required to use asphalt shingles, wala ring white nito hehe

Gusto ko rin sana asphalt shingles kasi maganda tingnan but nung nalaman ko na poor performance pala sya sa hot climates, metal long span na lang pinalagay namin.


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[travajante]

Gusto ko rin sana asphalt shingles kasi maganda tingnan but nung nalaman ko na poor performance pala sya sa hot climates, metal long span na lang pinalagay namin.


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Shingles poor in the tropics? Where did you hear that, sir? They don't corrode & when installed to factory specs, they hold the factory material warranty assigned to that particular variant, 20/30/50years....
I've seen metal roofs suffer way more typhoon damage than properly applied asphalt shingles. These are the reasons why top tropical resorts specify them.
Again, key here is to strictly follow the minimum roof slope, the proper underlay material & thickness, the proper moisture barrier, & the correct proportion of ridge ventilation. Improper install, cost/short-cutting may have given this type of roofing the false negative impression.
Amongst the available notable brands we've tried, IKO from North America has been the most consistent. Guess, them being the lone vertical roofing & waterproofing conglomerate got its pluses. Even IKO's granules are produced in-house. Owens & Certainteed outsource their raw materials from 3M & other companies. Some of their lines come from different plants, too. Consistency of batches over time come into play when the roofing will require sectional repairs or overlay.
Where metal roofs have the advantage over shingles? The latter requires a high minimum slope of 15°. Shingles can't do flat roofs. And, where you have a secondary & lower shingled roof, avoid it used as a relay to heavy water volume from roof valleys above them to avoid visible wear patches long term. Those said valleys above lower roofs, we normally apply selective sectional welded stainless gutters.
Roofing material choice(shingles/tiles/metal) is usually dictated by application, design intention & cost. When properly done, all these can perform to expectations.


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[Papajamba]

Shingles poor in the tropics? Where did you hear that, sir? They don't corrode & when installed to factory specs, they hold the factory material warranty assigned to that particular variant, 20/30/50years....
I've seen metal roofs suffer way more typhoon damage than properly applied asphalt shingles. These are the reasons why top tropical resorts specify them.
Again, key here is to strictly follow the minimum roof slope, the proper underlay material & thickness, the proper moisture barrier, & the correct proportion of ridge ventilation. Improper install, cost/short-cutting may have given this type of roofing the false negative impression.
Amongst the available notable brands we've tried, IKO from North America has been the most consistent. Guess, them being the lone vertical roofing & waterproofing conglomerate got its pluses. Even IKO's granules are produced in-house. Owens & Certainteed outsource their raw materials from 3M & other companies. Some of their lines come from different plants, too. Consistency of batches over time come into play when the roofing will require sectional repairs or overlay.
Where metal roofs have the advantage over shingles? The latter requires a high minimum slope of 15°. Shingles can't do flat roofs. And, where you have a secondary & lower shingled roof, avoid it used as a relay to heavy water volume from roof valleys above them to avoid visible wear patches long term. Those said valleys above lower roofs, we normally apply selective sectional welded stainless gutters.
Roofing material choice(shingles/tiles/metal) is usually dictated by application, design intention & cost. When properly done, all these can perform to expectations.


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Our previous architect told us that asphalt shingles hold more heat than GI sheets which reflect some of the heat, so went with that. We also have hidden roofs and just a small area can be seen so roof aesthetics were a small factor.
Sana pala ikaw na lang contractor namin hehe
Good thing youre here in the boards to give excellent advices![emoji1360]


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[travajante]

Our previous architect told us that asphalt shingles hold more heat than GI sheets which reflect some of the heat, so went with that. We also have hidden roofs and just a small area can be seen so roof aesthetics were a small factor.
Sana pala ikaw na lang contractor namin hehe
Good thing youre here in the boards to give excellent advices![emoji1360]


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No argument re heat retention & how colors & materials play a role in heat reflectivity. That's where the compensating components come in. Insulation & roof venting.
The various types of roofing have their respective pluses & minuses. Terracotta would've been ideal & great here, but are often shunned due to the cost of having them above our heads. And neither can clay do flat roofs. The added costs don't stop at roof quotes....Being in the tropics w/ a ton of rainfall, these need an added layer of metal undersheathing to get em watertight. Plus, the much higher density of clay requires beefier structural components that would continue down to the foundation.
Where susceptibility to corrosion isn't a factor, a good insulated thicker gauged metal roofing provides an ideal balance of function & cost. Now, pretty....that's what the designers are paid to do.[emoji4]
Me, just blessed to have had chances here & there to touch & test 1st hand them materials I personally can't afford. Every project provides valuable lessons w/ time's aid. I humbly deem sharing a pledge & duty to spare anyone from redundant, costly & proven mistakes.[emoji120]

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[WallyWest]

Yung pang waterproof ba ng swimming pool ok ipang waterproof sa firewall? And what's it called?

May nakausap kasi ako regarding sa pagpapa-waterproof ng isang firewall namin. He recommended something that's supposedly used for swimming pools. Costs 5k per 4-gallon bucket but he couldn't remember what it's called.

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[travajante]

Yung pang waterproof ba ng swimming pool ok ipang waterproof sa firewall? And what's it called?

May nakausap kasi ako regarding sa pagpapa-waterproof ng isang firewall namin. He recommended something that's supposedly used for swimming pools. Costs 5k per 4-gallon bucket but he couldn't remember what it's called.

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Check w/ Sika, they've a number of options. Crack Isolation Membrane(viscous liquid form), & Cementitious waterproofing among them. Unlike pool conditions where concrete won't be dehydrated nor be subjected to constant significant thermal fluctualtions due to them holding water, firewalls will require periodic attention/reapplication.
Should you want a permanent solution where possible, go for longspan prepainted roof sheets installed vertically onto your firewall. Make sure to overlay a good flashing layer to cover the area where the wall meets the roof.

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[boybi]

Check w/ Sika, they've a number of options. Crack Isolation Membrane(viscous liquid form), & Cementitious waterproofing among them. Unlike pool conditions where concrete won't be dehydrated nor be subjected to constant significant thermal fluctualtions due to them holding water, firewalls will require periodic attention/reapplication.
Should you want a permanent solution where possible, go for longspan prepainted roof sheets installed vertically onto your firewall. Make sure to overlay a good flashing layer to cover the area where the wall meets the roof.

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Is there an aesthetically better way of permanently waterproofing walls?

[travajante]

Is there an aesthetically better way of permanently waterproofing walls?

Yup, depends on the look you're after. Opaque Graphicote Glass or Aluminum Cladding are a couple & are pricier, but INFERIOR to longspan ribbed metal roofing for the application. Why? Those 2 rely on sealants which have lifespans shorter than the material they seal.
If you prefer retaining the look of concrete/masonry, there's a nonDIY system...EIFS. Pleko, Dryvit, Parex, LaHabra are some of the brands.


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[shadow]

Yup, depends on the look you're after. Opaque Graphicote Glass or Aluminum Cladding are a couple & are pricier, but INFERIOR to longspan ribbed metal roofing for the application. Why? Those 2 rely on sealants which have lifespans shorter than the material they seal.
If you prefer retaining the look of concrete/masonry, there's a nonDIY system...EIFS. Pleko, Dryvit, Parex, LaHabra are some of the brands.


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Pangit yun roofing gamitin kasi magmukhang warehouse.


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[viper888]

Yup, depends on the look you're after. Opaque Graphicote Glass or Aluminum Cladding are a couple & are pricier, but INFERIOR to longspan ribbed metal roofing for the application. Why? Those 2 rely on sealants which have lifespans shorter than the material they seal.
If you prefer retaining the look of concrete/masonry, there's a nonDIY system...EIFS. Pleko, Dryvit, Parex, LaHabra are some of the brands.


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An advantage of using long span for walls is one contractor will do the roof flashing along with the walls and roof. He can also do the waterproofing. Less pointing fingers in case of issues. I believe the long span roof flashing also requires sealants such as Sikasil G8.

But it will look out of place in residential applications. Actually ACP will also look out of place.

What we do for new construction is use an admixture for the plaster such as Sika 1. We also use it for walls without ledges above.


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