Mould / Discussions

How do you prevent walls from rotting in humid climates?

...mould, as other neighbors (a professional builder) who used plastic Vapour barrier have had mould show up in less than 2 years on his north wall. How can we avo...

Posted by Rose Alderson Nov. 5, 2018, 4:34 p.m. Wall assemblies - new construction 1 Responses

Why is there mold on particle board outside vapor barrier on new addition?

...mould on the exterior particple board. The are no leaks in the roof, or water running down the exterior walls. We wonder whether the mould is caused by condensa...

Posted by Christine ML June 7, 2020, 1:35 p.m. Wall assemblies - renovation 1 Responses

How to fix condensation on ceilings?

...mould growth on the plywood at the underside of the roof. We spent $20,000 in mould abatement, new aluminum soffits, extra shutes for ventilation, and all new i...

Posted by Jessica Sadler Nov. 13, 2019, 11:48 a.m. Walls and Roofs 1 Responses

What is the best way to Insulate a basement and floor joists that are embedded into the concrete?

...mould to see that the previous owners installed batt insulation directly onto the concrete wall and didnt have a vapour barrier. I've also noticed my joists are...

Posted by David Pereira April 28, 2020, 10:34 p.m. Foundation and basement improvements 2 Responses

How do I waterproof a foundation from the inside?

We have a self-adhesive membrane on the outside wall of our foundation but the water enters through the joint between the walls and the floor. How can I waterp...

Posted by Kurt Brenner Nov. 14, 2017, 9:47 a.m. Foundations and Basements 1 Responses

How should I insulate basement Walls in climate zone 5?

I live in climate zone 5 in USA and plan to frame basement walls roughly 3” away from concrete and then place mineral wool between the studs. I do not plan to ...

Posted by Chad Johnson March 25, 2019, 8:33 p.m. Basements improvements 1 Responses

How do you install a ground loop for an HRV?

...mould (or 'mold' for US readers) can form and introduce mould spores right into your ventilation system. There are some people that swear by ground loops and ...

Posted by Lee Watt July 10, 2018, 12:43 a.m. HRV and ERV 1 Responses

What causes moisture on a ceiling in winter?

I bought a duplex that was built in 1978 in Indiana. It gets moisture on ceiling so bad during winter when temps drop below 20 degrees that it will run down th...

Posted by Cheri Banet Jan. 23, 2020, 10:22 p.m. Wall assemblies - renovation 1 Responses

Does hydronic radiant cooling work?

Has hydronic radiant cooling advanced enough to be a viable, cost effective option for an average 2300 sq ft residential house? Hydronic radiant cooling can be...

Posted by dean c April 30, 2019, 8:01 p.m. Delivery: radiant, forced-air and decentralized 1 Responses

How do you insulate a crawlspace with dirt floor?

We have a cottage with a crawl space near Halliburton, Ontario,Canada. It has a solid block perimeter but has a dirt floor. Also, there is a very large rock un...

Posted by sal Bellicoso Oct. 30, 2019, 4:56 p.m. Crawl spaces 1 Responses

Is it normal that condensation forms on the windows of my new home?

I have a new house (self-built) on a concrete slab insulated with R22 rockwool and R3 panel insulation. The windows are double glazed wood and aluminum. I do n...

Posted by Kevin Newman April 19, 2017, 10:30 a.m. Windows and doors 1 Responses

What is the best way to Insulate the crawl space of an old home?

I have a 120 yr old home with a dirt crawl space that is completely dry, no Mold in the entire home, has new windows and new insulation in the attic. I have st...

Posted by Aj Jan. 21, 2020, 8:13 a.m. Crawl spaces 1 Responses

How do you insulate a crawlspace?

I live in Northern Ontario in a house converted from a cottage, it has a 20 'X 20' crawlspace with floor joists at about 24" on center. I put 6 mm polythene on...

Posted by Drew Weistend Nov. 14, 2017, 9:22 a.m. Crawl spaces 1 Responses

Is Condensation on Windows a bad sign?

Since the recent cold snap our double glazed windows are running with water, every morning it's all over the window sills, running down the wall - in the bathr...

Posted by Greg Olmstead Dec. 12, 2019, 6:21 a.m. Walls and Roofs 1 Responses

How do you build a mold-free basement in a new construction house?

I have a new construction project where one floor is subgrade. It has a cement wall on three sides that the contractor insured me was prepared to be mold resis...

Posted by Charmaine Herzig Feb. 10, 2020, 7:32 p.m. Basements improvements 3 Responses

What is the best way to insulate a crawlspace to keep humidity down and stop odors?

I have a crawlspace with 4' concrete walls and a cement floor, insulation between the floor joists and has 3 - vents to the outside. I am thinking of 1" foam b...

Posted by Dave Bell Oct. 24, 2019, 3:57 p.m. Crawl spaces 3 Responses

Is polyiso board or styrofoam best for insulating when finishing a basement in CO?

We have a concrete basement in decent condition that's about 20 years old in Boulder CO and having had mitigation installed for high radon levels we now want t...

Posted by Evan B. Nov. 21, 2019, 8 p.m. Basements improvements 1 Responses

How do you prevent mold in a finished basement?

We had a water leak in our basement earlier this year and when the contractors started pulling off damaged drywall we were disgusted to find that our basement ...

Posted by Brian Cole Nov. 22, 2019, 10:22 a.m. Basements improvements 1 Responses