Q: I have an 8-year-old pressured-treated deck that has had a significant amount of wood decay mostly in the framing lumber, but also in some of the decking. The deck is about 5 feet off the ground. What is the normal life expectancy of treated decking? We used ACQ lumber for the framing and MCA-treated decking. -- Sam A: Up till the early 2,000s, most pressure-treated … [Read more...] about How Long Will Treated Wood Deck Last?
Insects & Wood Decay
How To Prevent Woodpeckers From Damaging House
Q: We have a number of woodpecker holes in our wood fascia and corner boards and are looking for suggestions for how keep them away. The activity seems to be mostly in the spring when we often hear a loud rat-a-tat sound in the mornings. We’ve even caught sight of them in the morning. They seem to be downy or hairy woodpeckers, not the large pileated type. -- DH A: … [Read more...] about How To Prevent Woodpeckers From Damaging House
Vented Vs. Unvented Crawlspaces
Q: What are the best practices for a vented crawlspace? I bought a townhome last Nov. that has a vented crawlspace with a sump pump. There is a vapor barrier on the ground. There is a truss floor system that has faced batts that hang below the subfloor (the facing does not touch the subfloor), the rim joist was sealed with spray foam at the top and bottom and filled with … [Read more...] about Vented Vs. Unvented Crawlspaces
How To Protect Foam Insulation on Foundation?
Q: The foundation on my 1980s-era house is insulated on the exterior with sheets of foam board. Several inches of foundation are exposed above grade, where the foam is protected by aluminum flashing. The foam and flashing are unsightly. Would it risk termites or other problems to raise up the ground level with soil or river rock to cover up the foam? Are there better … [Read more...] about How To Protect Foam Insulation on Foundation?
How To Diagnose & Repair Rotted Framing?
Q: What is the cause and cure for wood rot in an exterior wall? I recently noticed that the corner of my house has rotting studs from the bottom up. The exterior sheathing is rotting as well. This area was never with siding due to being approximately 6 inches from a garage wall. What is the best way to repair the wall and to prevent future problems? The house was built eight … [Read more...] about How To Diagnose & Repair Rotted Framing?
Magnesium-Oxide Wallboard & Sheathing
Q: Magnesium-oxide board (ExtremeGreen board) seems to be a ideal building material, but Wikipedia and other sources say it has a problem of attracting condensation due to its salt content. Can you offer any advice? -- Keith B. A: Magnesium-oxide building products – sheathing, wallboard, siding, and other products such as SIPs – are very new in the U.S. so there is little … [Read more...] about Magnesium-Oxide Wallboard & Sheathing
How Durable is Mahogany Decking?
John asks: My local lumberyard stocks mahogany decking at a good price. How durable is this compared to other hardwoods? How would you recommend finishing? Steve Bliss, of BuildingAdvisor.com, responds: Most wood decking sold in the U.S. as “mahogany” is actually dark red meranti or, in some cases, red balau. Meranti and balau are in the same family as lauan, also called … [Read more...] about How Durable is Mahogany Decking?
Getting Rid Of Carpenter Ants?
Jonathan writes: I have been finding little piles of wood shavings on my backyard deck, along the bottom of the exterior wall of the house (see photo). Does this look like a sign of carpenter ants or termites? I suspect ants as I sometimes see large, black ants in the house. What's the best way to get rid of carpenter ants? Steve Bliss, of BuildingAdvisor.com, responds: … [Read more...] about Getting Rid Of Carpenter Ants?