Seal shut and stop water coming in the bottom of unused garage door

jmp1971

Hi,
I use my garage as a gym so have no use for the main door. A builder was meant to seal the bottom. There is a fake wall inside, however I pull up my mats and there is water. His not sealed correctly and has placed the gutter drain onto the back of the garage door. I know this must be moved. How can I seal this gap from the inside to fill the gap and stop the water? 

DB1904

If there's a wall on the inside of the garage door the only way you can seal it from the inside is removing the wall. I'd wait until you've had a long dry period and silicone it from the outside.  

jmp1971

The wall has a gap under it, about 1.5 inches. It left room for underlay and gym mats to fit under. I can see the metal garage door. Could I use just sealant to fix this problem?

Grumpy_chap

jmp1971 said:

The wall has a gap under it, about 1.5 inches. 

How is the wall supported?

Quite possibly, the solution is to take the wall down and build a new wall, starting from the ground up.

jmp1971

It’s boards with insulation in between. It was a concrete apex garage. 

Mistral001

Use sealant close to source of watter ie. between bottom of door and concrete below.  

GDB2222

Can you still open the garage door a bit? If so, there are specific sealing strips for the purpose.

Ajmason42

Photos would help understand the issue 

markin

jmp1971 said:

The wall has a gap under it, about 1.5 inches. It left room for underlay and gym mats to fit under. I can see the metal garage door. Could I use just sealant to fix this problem?

Is it a  2x4 wall with an air gap, will a standard silicone nozzle be long enough? By my measurements of a nozzle with just the tip cut off so very slow to come out, it will only reach 8cm under a 25mm gap.

Silicone from the outside, Or silicone and screw on a rubber flap, 10cm should do if its downhill.

Or use a can of window door spray foam.

Alias_Omega

Its a free standing concrete garage.

Is the base level? Does the front fall away into some form of ramp? If not, you might need to put some form of drain / duct on the outside to prevent the water from reaching the garage.

Its very likely the silicone / fibreglass installed at any point will only retain the water, not prevent it from coming inside. 

The other alternative is to raise the floor within the garage, thus allowing the water to be free on the bottom and vent away.

Doozergirl

This.  You would be better of with an ACO drain removing the water just before it hits the threshold rather than trying to stem the tide.