Have this problem only during heavy rain and hired some skylight workers to apply acrylic sealant on existing sealant on all the windows sill external and internal but it is still happen. Anyone experience this before and if you have any recommended contractor that can fix this once for all.



This post has been edited by echoesian: Jun 26 2017, 10:04 AM

You stay condo ah?

You have to apply the sealant outside instead of inside.

DIY cost you less than RM10. The sealant itself only around RM4.9

Fenestration leaks, quite common. Techniques used in building them are important esp where it sits. If there's no step down edge, unless a high quality waterproof sealant is applied on the outside, the water will eventually seep in on account of the weathering from the heat of the sun.

The workers applied the sealant both inside and outside. But they did not remove the old existing sealant, they just applied on top of the existing one, it looks ok but not sure it is effective enough. I stay at landed house, 3 storey it's hard for me to DIY unless I have scaffolding to access to the top floors.

Where is the area that the water seep in? Is it on the window sill? But the acrylic sealant already applied on all surrounding window sill. How do I solve this problem ?

From the look of it, the water leak is not direct from window sill.
It look more like water absorb through the wall from the crack of the sealant due to poor workmanship of the sealing.

How is externally look like? Have to see outside. Sometime water slip in from the aluminium, rubber and also from the base like "halcyon27" mentioned the base not angle properly.

I would think a good external paint will solve the problem..

It would prevent the water seepage into the wall and the window ledge would prevent water ponding..

This is a top angle from one of the window


Bottom side

The window concrete surrounding wall has been painted with waterproof liquid before painted with Dulux weathershield. It is also done with a ledge to avoid water ponding on the window sill.

If the wall-aluminium frame already properly seal, next possible is the rubber seal or the aluminum L join, and to proper apply silicon sealer have to remove the old sealer before apply. Is better to have one single piece rubber.

If on top of the glass have anymore space (wall), maybe can consider put a 2-3ft awning

Wrong thread

This post has been edited by nexona88: Jun 26 2017, 11:56 PM

I suspect its an installation problem..

if the weather proofing paint and silicon sealant at the window is proper there is no way water can leak inside..

There must be a gap somewhere or a spot where the paint or silicon is missing..

Admittedly, even my previous and current condo has been plagued by this issue. All I have researched is that it all boils down to how construction methods conform to correct building science where windows and walls join are concerned.

Seepage resistant construction and installation site preparation with proper sealing materials are crucial in that order. If the design is flawed, no amount of sealing will prevent seepage.

If there's any contact of anyone who can help reconstruct the windows and implement these but I don't know how much it costs. See here for sealants and joint site sealing material and page 20 onwards here on common joint site failures.

This post has been edited by halcyon27: Jun 27 2017, 06:35 PM

An external paint can prevent seepage?

My understanding..

An external paint is a water resistance/water proofing surface coating so i suppose it does prevent water from seeping into the surface.

You need to check exactly where it leak. When rain, check the leaking inside and outside. The leak might come from the aluminium frame corner joint.

By this way, you can find a solution to solve the leak.

When using silicon to seal the leak between windows and base, do not use normal silicone. Use the caulk type silicone. Normal silicone can't last long.

External paint is a weatherproof material, is not a water proofing material.
Same theory as you do not use a weather proof camera at swimming pool.

I agree..

However the application of the paint is for water seepage on a vertical outdoor wall.. which is a short period of water splash and open ventilation to air dry..

Not a swimming pool.. you will need a membrane layer for this type application ..

There is a big difference of applications in your examples..

Hello @echoesian,

If the leaks is from the aluminium joints, you may use our BM TDXP to seal the tiny joints.

Thanks