Monday, December 10, 2012

A greenhouse skylight repair...

The first big storm of the season always brings with it the liklihood of a few leaks in the greenhouse.
The ravine was rushing with rain runoff.
 

These skylight panels are laminated triple glazed. They're heavy.
They're held in place by the combination of a bead of sticky butyl glazing tape (between the panel glass and the aluminum channel the panels are bedded in) and the compression of rubber-lined batten strips which are screwed into the aluminum channel between panels. 
As solar energy waxes and wanes throughout the year, the expansion and contraction of dissimilar materials brings gravity into play, the sticky glazing bead loses its bond, and the screws loosen up. Slowly the panels begin to sag and a gap develops along the top edge where they slip out from under the top batten.
 

After mopping up the marble floor and wood window sills inside, I attempt (successfully, it turned out) a temporary repair with a roll of aluminum flashing, seen above.
 
 The far panel has slipped down about 3 or 4 inches.
 

I waited for better weather to tackle a more permanent solution.
 

Scaffold plank in place and batten strips removed, I began pulling up each panel and repositioning it on new glazing tape after cleaning both sides of the panel and the aluminum bed where the tape adheres.

An earlier 'expedient' repair last year with roofer's leakstop tape, visible in the photo above, has given way to gravity.
 

 
The aluminum channel at the bottom is cleaned and siliconed into place, held with duct tape until the silicone cures. The batten strips are re-fastened and screwed down as tightly as possible. Stainless steel screws into aluminum channel means threads easily stripped out the softer aluminum.
 
The south facing slope and the stone parapet make for a lot of heat. That's my theory of why this particular roof section has needed this kind of attention repeatedly.

Wednesday, November 28, 2012

Monday, November 12, 2012

Wednesday, October 17, 2012

A bird in the hand

A flock of these fluttered around the courtyard the other day. This one saw
his reflection in a glass door and was stunned to find out it wasn't a
rival. He recovered and rejoined the fray.

Thursday, October 11, 2012

Saturday, September 29, 2012

Termites in the attic

 
3 hotspots, one in each building, received a treatment to dissuade
termites and wood-boring beetles.





Here, the roof sheathing, seen in the attic above the great room fireplace,
shows the area affected.
George from Terminix, call Undercover Boss.

Tuesday, September 25, 2012

Thursday, August 23, 2012

Saturday, August 18, 2012

Tuesday, August 7, 2012

Wednesday, May 16, 2012