Many old living rooms and dining rooms have dark-stained windows, and indeed, many of the beautiful casings, stools, aprons and inner-stops are made from oak – mostly red oak, but sometimes the even more opulent ray-flecked white oak. (Less common, but also often seen, are casings made of stained birch, which can be mistaken for mahogany.)
However, the sashes – the up and down moving wooden frames that surround the glass are normally not made of oak. Here in Minnesota, they are made of Northern White Pine.
The sashes were also stained dark to match the oak (or birch, or some other hardwood,) and because the sashes are the same color as the more visible casings, many people mistakenly believe their sashes are also made of oak. They are not. They are made of pine.
Why two different species? Resin-rich pine naturally resists moisture so it is ideal for exterior applications. (Sills, blind stops, exterior casings and drip caps also need to resist moisture and are therefore also made of pine.)
Hardwoods like oak and birch have the qualities of beauty and durability and are therefore appropriate for interior applications.
This is one way to hold a sash when working on the bottom of the upper meeting rail.
Even 40 grit ROS paper clogs on paint, so alternative abrasive media is preferable. These two angle grinder mounted discs don’t clog as quickly so in many respects they are the way to go.
The Strip Discs work well, but they are pricey and seem to disintegrate fairly quickly. They don’t chew up the wood quite as much as the Flap Discs but still need to be followed up with 80 or 100G paper.
The Flap Discs are more aggressive so a delicate touch is needed. They also don’t last too long but they are cheaper than the strip discs. More ROS sanding is needed with these – perhaps beginning with 60G.
A big disadvantage to using an angle grinder for paint removal is the lack of good dust collection. This means more cleanup and more protective equipment.
The master frame is made from extruded, heavy-gauge aluminum This keeps the window rigid so it doesn’t flex in the wind.
Corners are butted together – not mitered – so window stays square ensuring sashes won’t fall out.
U-channel expanders compensate for any deviation in house window squareness by sealing tight against out-of-square casings and blind stops.
Both U-channel expander and master frame are thick so window is a true flush mount system, not just an applied expander like other systems.
Glass is marine-glazed to ensure a waterproof seal.
Sashes edges are sealed with fin and pile weatherstripping on both inside and outside to halt wind infiltration and provide for greater thermal sealing. Sash channel is protected with metal so no exposed plastic parts can break off.
Sash pins and latches are made of metal to ensure durability. Protruding pegs make latches easier to operate.
Latch detents ensure sash can be opened incrementally and securely locked at bottom.
Panes and screens are easily removed from the inside for cleaning.
Weep holes slits allow for moisture drainage thereby protecting wooden sills from pooling water. Offset, hidden drain holes block outside wind gusts.
Baked enamel finish available in common historic colors of white, cream, and dark brown. These windows resemble original wooden storms/screens and are suitable for restoration applications, but they have much greater thermal effectiveness and don’t need regular maintenance or to be swapped out twice a year, which is inconvenient and potentially dangerous especially when working from heights on the upper level of a house.
Includes a ten-year warranty but will likely last much, much longer.