DIY Doctor

Main navigation

Closed Fireplace - Closed and Hearth Removed

Postby matt2710 » Sun Nov 02, 2008 12:01 pm

Hello all,

Have used this excellent site for research, but this is my first post.

I have a room with one outside wall, and on this wall is a chimney breast which has been closed in the past, but no air brick. I removed the hearth entirely as the builders laid the toes of the floorboards onto the brick surround which didn't have a DPC. Well it did if you consider the floorboards were nailed down onto roofing felt!!

I have removed the hearth and there is now a void from underfloor, up the chimney breast, to an air brick whichis roughly between the my property and the upstairs flat. Also the chimney stack is removed and is capped, but I can't see form ground level if there is a vent.

My question is, should I fit a vent and grill in the room above the skirting to allow airflow as condensation gathers on the face of the chimney breast?

Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Sun Nov 02, 2008 11:43 am


Simply Build It

Postby Perry525 » Sun Nov 02, 2008 5:52 pm

The reason there is condensation on the brick wall is, that it is the coldest point in the room and all the water vapour in the room is condensing there.
I asume that you intend to join up the walls on either side to make a straight wall? When you do this you will have in effect a normal cavity wall and the inner wall will then be the same as elsewhere?

You do not mention if you have cavity walls?
Rank: Site Agent
Progress to next rank:
Posts: 734
Joined: Fri Jul 06, 2007 7:35 pm

Postby matt2710 » Mon Nov 03, 2008 11:44 am

Apologies, not cavity walls. Lath and plaster onto solid brick.

The left hand side of the chimney breast has a window in the wall, the other side is plastered.

The radiator is under the window, yet the right hand side gets considerably damp.

Would the blocked in fire place benefit from an air vent??

Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Sun Nov 02, 2008 11:43 am

Postby TheDoctor5 » Thu Jan 22, 2009 9:36 am

Last year 64% of the questions asked in our forum were answered within our DIY project pages at The project pages are now separated alphabetically and your answers are accompanied by diagrams and the ability to see, and buy, the tools and/or required to complete your project. Use our search box to look for your answer and save a great deal of time and money!
Posts: 1381
Joined: Tue Jan 20, 2009 9:17 am

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics