Quote Originally Posted by 2lits17 View Post
I'm looking for a contractor that do house repairs. I need to repair our firewall, after 3 years there's a lot of leaking that is coming out of our whole wall that is exposed to sun and rain from 3rd floor to ground floor.

yan problema sa mga bahay na gawa na nung binili, you will not know the quality of the materials. so after a few years pagawain na.

if anyone know any realiable, trusted and hinde taga mag presyo na contractor please PM me.
Allow me to share you the common sources of leaks & respective approaches we do for concrete firewalls:

1. Rotting gutters that rest on firewalls.
Solution:
A. Eliminate them by redesigning the roof to not relieve rain on the firewall side.
B. If A isn't possible, use 304Stainless gutters w/ TIG-welded, leak-tested. Avoid using Sealants & rivets on joints as they'll just be temporary relief.

2. Poor roof-wall joint flashings.
Solution:
A. Let the roof go over the top of the firewall, if possible.
B. Use 304SS TIG-welded seamless inverted J-shaped capping to cover the top exposed area of the firewall. Again, overlapping sheets w/ sealant won't give you permanent relief.

3. Waterproofing failure on the concrete firewall itself.
Concrete cracks with exposure to the elements, temp change & all. That's just how it is.
Cementitious, bituminous or elastomeric coatings do work but they'd need periodic re-stripping & reapplication every few years after. You won't want the recurring hassle & expense. They are short-term solutions like plaster on a wound that never heals.
Eliminate periodic maintenance. Do it right once....the 1st time is always ideal.
Solution:
Here's what we do(I wonder why I've yet to see anyone doing this).....Ask the neighbor where the wall divides permission for work access. Cover the exposed side of the firewall & cap the top entirely. Not w/ coatings but w/ Long-span Prepainted Roofing profile. With how substandard our construction materials have become, we normally go for 0.60mm thickness for metal roof profiles. Unlike condoms, thicker is better here.[emoji4]
A bit of overkill & an ounce of OCD prevention goes a looooong way.

And for those yet to build there homes or whatever, avoid this problem....Tell your designer you are allergic to Firewalls & Concrete Slab Roofs....That's another topic.

Hope this helps, sir. You need not a building contractor, but a good tinsmith (or 'stainless-smith' to be literal) who can custom shape & weld solutions. Best of luck!

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