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Basement Wall Cementing


Basement wall cementing and wall Parging involves applying a thin coat of a cement or polymeric mortar to concrete or masonry to refine the surface. Usually, a parge coat is up to a half inch in thickness. It's laid atop of wire lath, which is nailed over the old stone basement walls. This will give the wall strength. The intent is to create a joined surface by filling air voids, to level a surface, or to prep a surface for a protective coating. Parging with cement or stucco is a low-cost alternative to re pointing, and provides structural cohesiveness to masonry walls whose mortar has begun to fall apart. Parging with cement is a low-cost alternative to re-pointing, and provides structural cohesiveness to masonry walls whose mortar has begun to fall apart. Parging a brick,block,or stone foundation wall is an easy way to cover and strengthen, a wall that is susceptible to surface water. The thin parge coating is particularly useful for older stone and block foundations,which are held together with mortar.This process can be completed in one day.The parging process limits the number of hours of work, In a day, due to not installing wire lath on the walls. If parging a below grade foundation wall, It is wise to us an elastomeric wall coating, Over the Parging. I recommend a two coat process. The elastomeric coating will expand and contract with the movement of the cracks. It has crack bridging ability. Do not use a tar product,it will disintegrate within a few years. Leaving your foundation prone for leaking during the melting of the winter snow, and spring rains.

Whitewash Walls

We remember whitewash from tom sawyer's Aunt polly. It goes back to the 16th and 17th centuries. Whitewash has been applied to stone and brick walls, (stucco coated) buildings,wood siding,logs,plaster and adobe. Also Interior And Exterior of historical buildings, barns, Interior fireplaces. It's widespread use is a low cost material, and availability, to every one. it's non toxic to people and animals, and has no toxic fumes. But when mixing, use eye protection, and where rubber gloves. It's breathable, allowing damaging moisture vapor to escape. It also reflects light due to the calcite crystals, That form. That is why whitewash was applied to so many dimly lit interiors,of dark dingy old stone basement walls,farm houses etc. There are hundreds of whitewash recipe's that go back hundreds of years. Sahara Waterproofing has perfected its own whitewash mix. There is a mix for interiors, and a mix that will last for years on the exterior. You can use a stiff bristle brush, sponge rag, etc.

(Tom appeared on the sidewalk with a bucket of whitewash, and a long handeled brush. He surveyed the fence, and all gladness left him, and a deep melancholy settled down upon his spirit. Thirty yards of board fence nine feet high. poor tom LOL.)

Things You Should Do To Old Stone Basement Walls

Install Metal Lathe: Use Diamond-type corrosion resistant metal lath 27” wide by 96” long, 18 gauge, The wire “diamonds” in lath form pockets, which must be positioned upward to catch and hold the cement “scratch coat”, And finish coat. Apply the lath horizontally. When properly installed, the lath should feel fairly rough when running your hand up the surface. Nail the lath to stone walls, with a track fast gun 1 1/4 masonry nails and washers, or 1 1/4 stub masonry nails, nailed manually.

Basement Wall Coating - Thoroseal

Thoroseal modified with Acryl 60 and intergral acrylic polymer emulsion admixture, diluted with clean, potable water is used to fill, seal, waterproof and protect a variety of substrates including cast-in-place and precast concrete, brick,cinder block, common building and split-faced block, stucco, unglazed terra cotta, porous stone, gunite and other masonry substrates. It may be used on interior or exterior, above or below grade applications, such as mid, low and hi-rise buildings, parking garages, median barriers, bridges, water treatment plants, tunnels, silo exteriors, cooling towers, piers, retaining walls, locks, reservoirs, cisterns, basements, and foundations.

Thoroseal modified with Acryl 60 is used on vertical, overhead and non-traffic bearing horizontal surfaces where a waterproof, micro-porous seamless coating is required. It is hightly resistant to standing water, hydrostatic pressure and wind driven rain and will not soften even when in prolonged contact with standing water. It can be used on new construction or in restoration and renovation applications. Used as an alternative to mechanical finishing or rubbing of concrete, it provides a means to hide minor surface defects and blemishes in architectural concrete. Thoroseals serves as and ideal base coat for water based acrylic emulsion protective top coats such as Thorocoat, Thorosheen and Thorolastic.

Things You Should Not Do To Old Stone Basement Walls

Use Masonry glue and paint on,all four walls.especially over paint, and peeling and crumbling old stone, and dirt. It will eventually fall off within a couple of years. just imagine trying to paint over dirt. Hmmmm. just my thought.

 There are cases you can use the masonry glue. In spot patching. you have to dig out all the dirt, off the stones, and between the joints. And wash down thourly, to get all dirt off the stones. Fill in around stone aka pointing. then make a mix that consists of lime, Portland cement, and bar sand. And paint on glue over the stones.Or add in cement mix. I make my mix consistent every time.Not using shovels for the sand. If you do that,You do not get the consistent masonry mix. My mix will dry like concrete. and will last decades.

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Application

Whitewash is very caustic, it is hydraulic lime. It can burn your skin, and possibly blind you. It is very important when mixing, to wear a respirator, goggles and rubber gloves. The lime dust can cause nose, throat and lung irritation. Always tarp off the area that you are working in. Tape and cover area, with plastic that might get splashed. this way it will be easier to clean up after your project.​

Cinder Block Walls

Cinder Block Walls, also called concrete blocks. Concrete blocks, or cinder blocks,And are very porous, and expels moisture. which can weaken the paint. You should not paint over, painted cinder blocks. You must remove all paint with environmentally safe paint remover, or shot blasting.Proper preparation ensures an even paint application that will resist peeling and flaking. Call Sahara Waterproofing for the right kind of waterproof material for your walls.​


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