Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Concrete, Stone & Masonry

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-26-2012, 09:13 PM   #1
Newbie
 
Join Date: Oct 2012
Posts: 3
Share |
Default

Installing Vent Holes in Old Brick Walls


I bought a house two years earlier. After about 10 months, I noticed some mold growing on some portions of exterior walls. I have removed the drywall/plaster from one of the wall and noticed that the wall is actually build with a layer of bricks outside and a layer of blocks inside with no building wrap. There was a rough plaster on inner side of blocks on which a felt and furring strips were laid to put the drywall on. I noticed various wet spots on plaster. I have sealed all cracks from outside and insulated the wall from inside. Now I am afraid, that if some water again trapped inside the wall, it may not dry and there may be another mold problem.

What I want to do: I want to drill 3/4 inch holes at an angle from outside in the mortor joints, through to the face of blocks (i.e. drill holes in outer layer of bricks) install perforated pipes with some grating material so that bugs may not enter but the water may drain and air may circulate. I want to install these holes every 4 feet. I just want comments that whether this idea work

mskhanca is offline   Reply With Quote
Old 10-27-2012, 06:55 AM   #2
Member
 
Join Date: Jun 2009
Location: Somerset, England
Posts: 680
Default

Installing Vent Holes in Old Brick Walls


mskhanca,
Is there a cavity between the brick and block of 2-3 inches, or is it a solid wall? Do you live in a damp climate?
Is the damp at the top or bottom of the walls?
Can you put on a few photos of the inside and outside walls?

stuart45 is offline   Reply With Quote
The Following User Says Thank You to stuart45 For This Useful Post:
mskhanca (10-31-2012)
Old 10-31-2012, 11:09 AM   #3
Newbie
 
Join Date: Oct 2012
Posts: 3
Default

Installing Vent Holes in Old Brick Walls


Quote:
Originally Posted by stuart45 View Post
mskhanca,
Is there a cavity between the brick and block of 2-3 inches, or is it a solid wall? Do you live in a damp climate?
Is the damp at the top or bottom of the walls?
Can you put on a few photos of the inside and outside walls?
There is no cavity as such. The houses at that time were build with block walls instead of lumber framing (i.e instead of lumber framing, blocks walls were erected and roofing etc was then installed) After completion of roof, Brick wall was constructed outside the block wall. I don't have photos but it is simply a layer of blocks and layer of bricks. There may be a cavity in mils not in inches

Thanks
mskhanca is offline   Reply With Quote
Old 10-31-2012, 05:36 PM   #4
Member
 
Join Date: Jun 2009
Location: Somerset, England
Posts: 680
Default

Installing Vent Holes in Old Brick Walls


There are quite a few houses here with that kind of construction, although the brickwork and blockwork were usually put up together.
I am guessing you live in Canada calling it lumber and using the metric system.
The idea with a solid 9 inch wall is that the moisture will only penetrate about 4 or 5 inches before the heat from inside makes it evaporate back out.
However gaps between the brick and block can allow water to penetrate, especially if the brick pointing is poor and you get a lot of driving rain. This type of wall isn't used on housing now.
Condensation also is a big cause of mould.
stuart45 is offline   Reply With Quote
Old 10-31-2012, 07:54 PM   #5
Newbie
 
Join Date: Oct 2012
Posts: 3
Default

Installing Vent Holes in Old Brick Walls


Quote:
Originally Posted by stuart45 View Post
There are quite a few houses here with that kind of construction, although the brickwork and blockwork were usually put up together.
I am guessing you live in Canada calling it lumber and using the metric system.
The idea with a solid 9 inch wall is that the moisture will only penetrate about 4 or 5 inches before the heat from inside makes it evaporate back out.
However gaps between the brick and block can allow water to penetrate, especially if the brick pointing is poor and you get a lot of driving rain. This type of wall isn't used on housing now.
Condensation also is a big cause of mould.
Yes, I live in Canada. I know that these type of houses are not constructed now. The mold problem is due to condensation and may be due to water penetrated through cracks
mskhanca is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mobile Home walls - with holes... LilTuffGirl Painting 1 12-26-2011 04:17 AM
white triangle lines on both side walls around my brick chimney. peter101 Roofing/Siding 11 10-11-2011 08:20 AM
framing around exterior brick walls HollyHill Carpentry 2 04-18-2011 01:25 AM
Installing vent in glass block window jasoncw Building & Construction 6 09-27-2009 10:57 AM
Keeping Water out of the Top of Brick Walls o2barockstar Roofing/Siding 4 02-18-2008 02:50 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.